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Home My WebLink AboutDRB140164_42DF -5 si_1400534160.pdfManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420010-01 Printed in U.S.A. Form 42-5SI Pg 1 1-14 Replaces: 42-4SI Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,2 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 PRE-INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42 Unpack and Inspect Units . . . . . . . . . . . . . . . . . . . . . . . . 4 Protect Units From Damage . . . . . . . . . . . . . . . . . . . . . . 4 Prepare Jobsite for Unit Installation. . . . . . . . . . . . . . 4 Identify and Prepare Units. . . . . . . . . . . . . . . . . . . . . . . . 4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-79 Step 1 — Place Units in Position . . . . . . . . . . . . . . . . 42• 42C UNITS• 42V UNITS• 42D UNITS• 42S UNITS Step 2 — Make Piping Connections . . . . . . . . . . . . . 53• VALVE PACKAGES• 42C,D,V DRAIN CONNECTIONS• 42C,D,V WATER SUPPLY/RETURN CONNECTIONS• 42C,D,V STEAM CONNECTIONS• 42C,D,V DIRECT EXPANSION (DX) REFRIGERANT PIPING• TEST AND INSULATE Step 3 — Make Electrical Connections . . . . . . . . . . 66• FACTORY-INSTALLED OPTIONS• STANDARD WIRING PACKAGES Step 4 — Make Duct Connections . . . . . . . . . . . . . . . 77 Step 5 — Frame and Finish Unit. . . . . . . . . . . . . . . . . 77 Step 6 — Cut Out Openings for Grilles and Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Step 7 — Make Final Preparations. . . . . . . . . . . . . . . 77 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79-81 Cooling/Heating System. . . . . . . . . . . . . . . . . . . . . . . . . 80 Air System Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Water System Balancing . . . . . . . . . . . . . . . . . . . . . . . . 80 Water Treatment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Controls Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81,82 Excessive Condensation on Unit. . . . . . . . . . . . . . . . 81 To Clean Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Check Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Fan Motor Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Clean Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Clean Electric Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Clean or Replace Air Filters . . . . . . . . . . . . . . . . . . . . . 81 Electrical Wiring and Controls . . . . . . . . . . . . . . . . . . 82 Valves and Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Page APPENDIX A — POTENTIOMETER ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 APPENDIX B — EVO/ECM 4-SPEED ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 START-UP CHECKLIST FOR 42C,D,S,V SERIES FAN COIL AIR CONDITIONERS. . . . . . . . .CL-1, CL-2 SAFETY CONSIDERATIONS Installation of this unit can be hazardous due to electrical com-ponents and equipment location (such as a ceiling or elevatedstructure). Only trained, qualified installers and servicemechanics should install and service this equipment. When installing this unit, observe precautions in the literature,labels attached to the equipment, and any other safety precau-tions that apply.• Follow all safety codes.• Wear safety glasses and work gloves. Never wear bulkyor loose fitting clothing when working on any mechani-cal equipment. Gloves should be worn for proper protec-tion against heat and other possible injuries. Safetyglasses or goggles should always be worn when drilling,cutting, or working with chemicals such as refrigerantsor lubricants.• Use care in handling and installing this unit.• Never pressurize any equipment beyond specified testpressures. Always pressure test with an inert fluid or gassuch as clear water or dry nitrogen to avoid possibledamage or injury in the event of a leak or componentfailure during testing. Always protect adjacent flamma-ble material when welding or soldering. Use a suitableheat-shield material to contain sparks or drops of solder.Have a fire extinguisher readily available. INTRODUCTION Carrier fan coil units represent a prudent investment offer-ing trouble-free operation and long service with proper installa-tion, operation, and regular maintenance. Your equipment isinitially protected under the manufacturer’s standard warranty;however, this warranty is provided under the condition that thesteps outlined in this manual for initial inspection, proper in-stallation, regular periodic maintenance, and everyday opera-tion of the equipment be followed in detail. This manual shouldbe fully reviewed in advance before initial installation, start-up,and any maintenance. Should any questions arise, please WARNING ELECTRIC SHOCK HAZARD. To avoid the possibilityof electrical shock, open and tag all service switches beforeinstalling this equipment. 42C,D,S,V Series Fan Coil Air Conditioners 2 contact your local sales representative or the factory BEFOREproceeding. This document contains general installation instructions forthe 42C,D,S,V unit fan coils. Refer to the unit wiring diagraminstalled on the blower housing or specific manufacturer litera-ture for any other type of factory-mounted controls. See drawings for unit configurations, dimensions, clearances,and pipe connections. Refer to unit wiring label for all electricalconnections; follow NEC (National Electrical Code) and localcodes. PHYSICAL DATA Component weight data, shipping weights, and filter data ofthe 42C,D,S,V units are provided in Tables 1-4. Table 1 — Physical Data — 42C Series Units *Calculate Operating Weight of Unit: Shipping Weight + Coil Water Weight x Number of Coil Rows. †Filter size if located in return-air plenum. UNIT SIZE 42C 02 03 04 06 08 10 12 NOMINAL AIRFLOW (cfm)200 300 400 600 800 1000 1200 SHIPPING WEIGHT (lb)* 42CA 36 39 49 59 64 95 107 42CE 55 60 70 82 95 135 154 42CG 98 118 126 168 176 215 245 42CK 115 120 135 150 155 227 241 COIL WATER WEIGHT (Approx lb per row of coil) 42CA, CE, CG, CK 0.7 0.8 1.0 1.4 1.7 2.3 2.7 COILS FPI 10 fins/inch Coil Face Area (sq ft)0.8 1.1 1.4 1.9 2.3 3.2 3.7 MOTOR (qty) 42C Series 111 1 122 BLOWER (qty) 42CA, CE, CG, CK 112 2 244 FILTERS Nominal Size (in.) (1-in. thick) 42CA NA NA NA NA NA NA NA 42CE†10 x 18 10 x 22 10 x 28 10 x 33 10 x 40 10 x 54 10 x 62 42CG Bottom Return 10 x 231/2 10 x 28 10 x 32 1/2 10 x 37 10 x 41 10 x 54 1/2 10 x 63 Rear Return 8 x 231/2 8 x 28 8 x 32 1/2 8 x 37 8 x 41 8 x 54 1/2 8 x 63 42CK Bottom Return 10 x 28 10 x 28 10 x 33 10 x 45 10 x 45 10 x 62 10 x 62 Rear Return 7 x 21 7 x 21 7 x 27 7 x 38 7 x 38 7 x 52 7 x 52 Qty 111 1 111 SUPPLY DUCT COLLAR 1-in. PIPING CONNECTIONS (Sweat) (in. OD) Coil Outlet and Inlet 5/8 Drain Connection 7/8 Tell-Tale Drain 5/8 3 Table 2 — Physical Data — 42V Series Units *Calculate Operating Weight of Unit: Shipping Weight + Coil Water Weight x Number Of Coil Rows. †Available in sizes 02-06. Table 3 — Physical Data — 42D Series Units *Calculate Operating Weight of Unit: Shipping Weight + Coil Water Weight x Number of Coil Rows. UNIT SIZE 42V 01 02 03 04 06 08 10 12 NOMINAL AIRFLOW (cfm)150 200 300 400 600 800 1000 1200 SHIPPING WEIGHT (lb)* 42VA — 42 47 57 77 79 108 127 42VB — 63 68 82 99 101 133 154 42VC — 50 60 72 110 — — — 42VE — 72 100 108 154 — — — 42VF — 64 69 83 100 102 135 156 42VG 40 — 74 — — — — — COIL WATER WEIGHT (Approx lb per row of coil) 42VA, VB, VC†, VF — 0.7 0.8 1.0 1.4 1.7 2.3 2.7 42VE — 0.9 1.2 1.6 2.3 — — — 42VG 0.4 — 1.0 — — — — — COILS FPI (42VA, VB, VF)12 fins/inch FPI (42VC, VE, VG)10 fins/inch Coil Face Area (sq ft)0.8 0.8 1.1 1.4 1.9 2.3 3.2 3.7 MOTOR (qty) 42VA, VB, VF —111 1122 42VC, VE —1 1 1 2 — — — 42VG 1— 2 — — — — — BLOWER (qty) 42VA, VB, VF —112 2244 42VC, VE —2 2 2 4 — — — 42VG 1— 2 — — — — — FILTERS Nominal Size (in.) (1-in. thick) 42VA, VB, VF —73/4 x 213/4 73/4 x 213/4 73/4 x 313/4 73/4 x 413/4 73/4 x 433/4 73/4 x 573/4 73/4 x 653/4 42VC, VE —7 x 213/4 7 x 263/4 7 x 343/4 7 x 483/4 ——— 42VG 10 x 141/2 — 10 x 28 — — — — — Qty 1111 1111 SUPPLY DUCT COLLAR 1-in. PIPING CONNECTIONS (Sweat) (in.) Coil Outlet and Inlet 5/8 OD Drain Connection 3/4 MPT UNIT SIZE 42D 0608101214161820 NOMINAL AIRFLOW (cfm)600 800 1000 1200 1400 1600 1800 2000 SHIPPING WEIGHT (lb)* 42DA 64 79 90 108 119 124 141 151 42DC 94 107 150 169 174 178 195 220 42DD 135 145 155 180 190 200 215 230 42DE 150 160 170 195 205 215 230 235 42DF 157 167 177 202 215 225 240 255 COIL WATER WEIGHT (Approx lb per row of coil)1.31.61.92.32.73.03.43.7 COILS FPI 10 fins/inch Coil Face Area (sq ft)1.62.12.53.03.54.14.65.0 MOTOR (qty)11122222 BLOWER (qty)11122222 FILTERS Nominal Size (in.) (1-in. thick) 42DA NA 42DC 14 x 21 14 x 26 14 x 30 14 x 35 14 x 40 14 x 45 14 x 50 14 x 54 42DD (Front Return)123/4 x 21 12 3/4 x 26 12 3/4 x 30 12 3/4 x 35 12 3/4 x 40 12 3/4 x 45 12 3/4 x 50 12 3/4 x 54 (Bottom Return)123/4 x 20 12 3/4 x 25 12 3/4 x 29 12 3/4 x 34 12 3/4 x 39 12 3/4 x 44 12 3/4 x 49 12 3/4 x 53 42DE 14 x 143/4 14 x 193/4 14 x 233/4 14 x 283/4 14 x 333/4 14 x 383/4 14 x 433/4 14 x 473/4 42DF 14 x 14 14 x 20 14 x 24 14 x 28 14 x 34 14 x 38 14 x 44 14 x 48 Qty 1 SUPPLY DUCT COLLAR 1-in. PIPING CONNECTIONS Coil Inlet/Outlet (in. OD) 1 and 2 Row 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 3 Row 5/8 5/8 7/8 7/8 7/8 7/8 7/8 7/8 4 Row 7/8 7/8 7/8 7/8 7/8 11/8 11/8 11/8 5 Row 7/8 7/8 7/8 7/8 11/8 11/8 11/8 11/8 6 Row 7/8 7/8 7/8 7/8 11/8 11/8 11/8 11/8 8 Row 11/8 11/8 11/8 11/8 15/8 15/8 15/8 15/8 4 Table 4 — Physical Data — 42S Series Units *Calculate Operating Weight of Unit: Shipping Weight + Coil Water Weight x Number of Coil Rows. †42SJ units require two filters. PRE-INSTALLATION Unpack and Inspect Units — All units are carefullyinspected at the factory throughout the manufacturing processunder a strict detailed quality assurance program, and, wherepossible, ALL major components and sub-assemblies are care-fully tested for proper operation and verified for full compli-ance with factory standards. Operational testing of some cus-tomer-furnished components such as electronic control valvesand digital controllers may be a possible exception. Each unit is carefully packaged for shipment to avoid dam-age during normal transit and handling. Equipment should al-ways be stored in a dry place, and in the proper orientation asmarked on the carton. All shipments are made F.O.B. factoryand are the responsibility of the receiving party to inspect theequipment upon arrival. Any obvious damage to the cartonand/or its contents should be recorded on the bill of lading anda claim should be filed with the transportation company, andCarrier should be advised. After determining the condition ofthe carton exterior, carefully remove each unit from the cartonand inspect for hidden damage. At this time, check to makesure that “furnished only” items such as thermostats, grilles etc.are accounted for whether packaged separately or shipped at alater date. Any hidden damage should be recorded and imme-diately reported to the transportation company, a claim shouldbe filed with the transportation company, and Carrier should benotified. In the event a claim for shipping damage is filed, theunit, shipping carton, and all packing must be retained forphysical inspection by the transportation company. All equip-ment should be stored in the factory shipping carton with inter-nal packing in place until installation. At the time of receipt, the equipment type and arrangementshould be verified against the order documents. Should anydiscrepancy be found, the local sales representative should benotified immediately so that proper action may be taken.Should any questions arise concerning warranty repairs, thefactory must be notified BEFORE any corrective action is tak-en. Where local repairs or alterations can be accomplished, thefactory must be fully informed of the extent and expected costof those repairs before work is begun. Where factory opera-tions are required, the factory must be contacted for authoriza-tion to return equipment and a Return Authorization Numberwill be issued. Unauthorized return shipments of equipmentand shipments not marked with an authorization number willbe refused. In addition, any claims for unauthorized expenseswill not be accepted by the manufacturer. Protect Units from Damage — All equipment is de-signed and fabricated with robust materials and presents a rugged appearance. Still, great care must be taken to assurethat no force or pressure is applied to the coil, piping, or drainstub-outs during handling. Depending on the options and ac-cessories, some units may contain delicate components thatmay be damaged by improper handling. All units shall be han-dled by the chassis or as close as possible to the unit mountingpoint locations. In the case of a full cabinet unit, the unit mustbe handled by the exterior casing. This is acceptable providedthe unit is maintained in an upright position, and no force is ap-plied that may damage internal components or paintedsurfaces. The equipment must always be properly supported. Tempo-rary supports used during installation or service must be ade-quate to hold the equipment securely. Equipment should al-ways be stored in the proper orientation as marked on the car-ton. To maintain warranty, protect units against hostileenvironment (such as rain, snow, or extreme temperatures),theft, vandalism, and debris on jobsite. Equipment covered inthis manual is not suitable for outdoor installations. Do not al-low foreign material to fall into drain pan. Prevent dust and de-bris from being deposited on motor, fan wheels and cooling/heating coils. Failure to do so may have serious adverse effectson unit operation, and in the case of the motor and blower as-sembly, may result in immediate or premature failure. Manu-facturer's warranty is void if foreign material is allowed to bedeposited on the motor or blower wheels of any unit. Someunits and/or job conditions may require some form of tempo-rary covering during construction. Prepare Jobsite for Unit Installation — To savetime and to reduce the possibility of costly errors, set up a com-plete sample installation in a typical room at jobsite. Check allcritical dimensions such as pipe, wire, and duct connectionrequirements. Refer to job drawings and product dimensiondrawings as required (see Fig. 1-38). Instruct all trades in theirpart of the installation. Identify and Prepare Units — Be sure power require-ments match available power source. Refer to unit nameplateand wiring diagram. 1. Check all tags on unit to determine if shipping screws areto be removed. Remove screws as directed. 2. Rotate the fan wheel by hand to ensure that the fan isunrestricted and can rotate freely. Check for shippingdamage and fan obstructions. Adjust blower motor asrequired. 3. Perform "Dry Fit" of valve assembly that may be shippedunattached to unit coil assembly. Should any questionsarise on fit up please contact your local representative. UNIT SIZE 42S 03 04 06 08 10 12 14 16 20 NOMINAL AIRFLOW (cfm)300 400 600 800 1000 1200 1400 1600 2000 SHIPPING WEIGHT (lb)* 42SGA,SGM,SU 180 225 240 260 280 305 — — — 42SH 202 247 262 286 311 336 — — — 42SJ 360 450 480 520 560 610 — — — 42SGS 162 203 216 234 252 275 — — — 42SM ——————390390390 COIL WATER WEIGHT (Approx lb per row of coil)1.79 2.63 3.45 4.09 4.09 4.39 COILS FPI 14 fins/inch BLOWER (qty) 42SGA,SH,SU,SGM,SGS,SM 11111111 1 42SJ 222222——— FILTERS Nominal Size (in.) (1-in. thick)121/2 x 241/4 161/4 x 263/4 201/2 x 291/4 241/2 x 291/2 261/2 x 291/2 Qty 1† PIPING CONNECTIONS Inlet (in. OD)1/2, unless larger size valve package is selected 5 Fig. 1 — 42CA Furred-In Horizontal Unit Dimensions LEGEND 1—Junction Box (remote mount) 2—Flexible Metal Conduit 3—Drain Conn, 7/8-in. OD 4 —Tell-Tale Drain Conn, 5/8-in. OD (optional) 5—Drip Lip (optional, shipped loose) 6—Hanger Slots (4), Rubber Grommet has 3/8-in. Diameter Hole 7—Supply Duct Collar, 1-in. 8—Air Vent, 1/8-in. MPT 9—Return Conn, 5/8-in. OD 10—Supply Conn, 5/8-in. OD *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)AA’BD’E FGH Blower Motor 02 200 21 1/4 311/4 16 13 18 1/4 61/4 83/4 193/4 1 1 0.83 36 03 300 25 1/4 361/4 20 14 22 1/4 61/4 83/4 233/4 1 1 1.08 39 04 400 31 1/4 431/4 26 15 28 1/4 61/4 83/4 293/4 2 1 1.35 49 06 600 36 1/4 431/4 31 10 33 1/4 71/2 10 34 3/4 2 1 1.88 59 08 800 43 1/4 571/4 38 17 40 1/4 71/2 10 41 3/4 2 1 2.31 64 10 1000 57 1/4 651/4 52 11 54 1/4 71/2 10 55 3/4 4 2 3.16 95 12 1200 65 1/4 751/4 60 13 62 1/4 71/2 10 63 3/4 4 2 3.65 107 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Overall unit dimension increases by 4 in. with optional electric heat. 5. Not shown: 3-speed fan switch; wall plate; closed cell foam on main drain pan. 6. Units have galvanized finish. 7. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 8. Dimensions shown in inches (mm). a42-4099.eps 6 Fig. 2 — 42CA Furred-In Horizontal Unit with Electric Heat Dimensions LEGEND 1—Junction Box (remote mount) 2—Flexible Metal Conduit 3 —Strip Heater High Limit 4 —Electric Strip Heater Element 5 —Tell-Tale Drain Conn, 5/8-in. OD (optional) 6—Drain Conn, 7/8-in. OD 7—Drip Lip (optional, shipped loose) 8—Supply Duct Collar, 1-in. 9—Air Vent, 1/8-in. MPT 10—Return Conn, 5/8-in. OD 11—Supply Conn, 5/8-in. OD 12—Hanger Slots (4), Rubber Grommet has 3/8-in. Diameter Hole NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Overall unit dimension increases by 4 in. with optional electric heat. 5. Not shown: 3-speed fan switch; wall plate; closed cell foam on main drain pan. 6. Units have galvanized finish. 7. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 8. Dimensions shown in inches (mm). *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)AA’BD’E FGHBlower Motor 02 200 21 1/4 311/4 16 13 18 1/4 61/4 83/4 193/4 1 1 0.83 38 03 300 25 1/4 361/4 20 14 22 1/4 61/4 83/4 233/4 1 1 1.08 41 04 400 31 1/4 431/4 26 15 28 1/4 61/4 83/4 293/4 2 1 1.35 51 06 600 36 1/4 431/4 31 10 33 1/4 71/2 10 34 3/4 2 1 1.88 61 08 800 43 1/4 571/4 38 17 40 1/4 71/2 10 41 3/4 2 1 2.31 66 10 1000 57 1/4 651/4 52 11 54 1/4 71/2 10 55 3/4 4 2 3.16 97 12 1200 65 1/4 751/4 60 13 62 1/4 71/2 10 63 3/4 4 2 3.65 109 a42-4100.eps 7 Fig. 3 — 42CE Furred-In Horizontal Unit with Plenum Dimensions NOTES: 1. Right hand unit with standard 3-row coil shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Unit available with bottom or rear return air. 5. Overall dimension increases by 4 in. with optional electric heat. 6. Not shown: 3-speed fan switch; wall plate; 1/2-in. fiberglass insulation on inside of plenum, closed cell foam on main drain pan. 7. Units have galvanized finish. 8. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 9. Dimensions shown in inches (mm). LEGEND 1—Junction Box, 4 in. x 4 in. 2—Flexible Metal Conduit 3—Mounting Bracket 4—Drain Conn, 7/8-in. OD 5—Tell-Tale Drain Conn, 5/8-in. OD (optional) 6—Drip Lip (optional, shipped loose) 7—Filter 8—Return Duct Collar, 1-in. 9—Filter Access Panel 10 —Access Panel 11 —Supply Duct Collar, 1-in. 12 —Air Vent, 1/8-in. MPT 13 —Return Conn, 5/8-in. OD 14 —Supply Conn, 5/8-in. OD 15 —Hanger Slots (4), Rubber Grommet has 3/8-in. Diameter Hole *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb) RETURN AIR DUCT (inches)AA’BCD’EFGHBlower Motor 02 200 21 1/4 311/4 16 18 1/4 13 19 3/4 61/4 83/4 153/8 1 1 0.83 55 10 1/2 x 181/4 03 300 25 1/4 361/4 20 22 1/4 14 23 3/4 61/4 83/4 193/8 1 1 1.08 60 10 1/2 x 221/4 04 400 31 1/4 431/4 26 28 1/4 15 29 3/4 61/4 83/4 253/8 2 1 1.35 70 10 1/2 x 281/4 06 600 36 1/4 431/4 31 33 1/4 10 34 3/4 71/2 10 30 3/8 2 1 1.88 82 10 1/2 x 331/4 08 800 43 1/4 571/4 38 40 1/4 17 41 3/4 71/2 10 37 3/8 2 1 2.31 95 10 1/2 x 401/4 10 1000 57 1/4 651/4 52 54 1/4 11 55 3/4 71/2 10 51 3/8 4 2 3.16 135 10 1/2 x 541/4 12 1200 65 1/4 751/4 60 62 1/4 13 63 3/4 71/2 10 59 3/8 4 2 3.65 154 10 1/2 x 621/4 a42-4101 8 Fig. 4 — 42CE Furred-In Horizontal Unit with Plenum and Electric Heat Dimensions NOTES: 1. Right hand unit with standard 3-row coil shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Unit available with bottom or rear return air. 5. Overall dimension increases by 4 in. with optional electric heat. 6. Not shown: 3-speed fan switch; wall plate; 1/2-in. fiberglass insulation on inside of plenum, closed cell foam on main drain pan. 7. Units have galvanized finish. 8. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 9. Dimensions shown in inches (mm). LEGEND 1—Junction Box, 4 in. x 4 in. 2—Flexible Metal Conduit 3—Mounting Bracket 4—Electric Strip Heater Element 5—Drain Conn, 7/8-in. OD 6—Strip Heater High Limit 7—Tell-Tale Drain Conn, 5/8-in. OD (optional) 8—Drip Lip (optional, shipped loose) 9—Filter 10 —Return Duct Collar, 1-in. 11 —Filter Access Panel 12 —Access Panel 13 —Supply Duct Collar, 1-in. 14 —Air Vent, 1/8-in. MPT 15 —Return Conn, 5/8-in. OD 16 —Supply Conn, 5/8-in. OD 17 —Hanger Slots (4), Rubber Grommet has 3/8-in. Diameter Hole *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb) RETURN AIR DUCTAA’BCD’EFGHBlower Motor 02 200 21 1/4 311/4 16 18 1/4 13 19 3/4 61/4 83/4 153/8 1 1 0.83 57 10 1/2 x 181/4 03 300 25 1/4 361/4 20 22 1/4 14 23 3/4 61/4 83/4 193/8 1 1 1.08 62 10 1/2 x 221/4 04 400 31 1/4 431/4 26 28 1/4 15 29 3/4 61/4 83/4 253/8 2 1 1.35 72 10 1/2 x 281/4 06 600 36 1/4 431/4 31 33 1/4 10 34 3/4 71/2 10 30 3/8 2 1 1.88 84 10 1/2 x 331/4 08 800 43 1/4 571/4 38 40 1/4 17 41 3/4 71/2 10 37 3/8 2 1 2.31 97 10 1/2 x 401/4 10 1000 57 1/4 651/4 52 54 1/4 11 55 3/4 71/2 10 51 3/8 4 2 3.16 137 10 1/2 x 541/4 12 1200 65 1/4 751/4 60 62 1/4 13 63 3/4 71/2 10 59 3/8 4 2 3.65 156 10 1/2 x 621/4 A42-4102 9 Fig. 5 — 42CG Horizontal Cabinet Unit Dimensions LEGEND 1—Junction Box, 4 in. x 4 in. 2—Optional Return Air Location 3—Drip Lip (optional, shipped loose) 4—Mounting Holes (4), Rubber Grommets have 3/8-in. Diameter Hole 5—Electrical Knockout, 7/8-in. Diameter 6—Return Knockout, 1-in. Diameter 7—Supply Knockout, 11/2-in. Diameter 8—Drain Knockout, 11/2-in. Diameter 9—Supply, Return Connections, 5/8-in. OD 10 —Drain Connection, 7/8-in. OD 11 —Optional Valve Package (inside cabinet) 12 —Filter 13 —Standard Stamped-Return Air Grille 14 —Removable Hinged Access Panel 15 —Supply Grille, Stamped, Standard *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ABCEFGBlower Motor 02 200 38 17 1/8 107/16 34 5 3/4 11 1 1 0.83 98 03 300 42 21 1/2 101/4 38 5 3/4 11 1 1 1.08 118 04 400 48 25 7/8 111/16 44 5 3/4 11 2 1 1.35 126 06 600 53 34 5/8 93/16 49 6 3/4 12 2 1 1.88 168 08 800 60 39 10 1/2 56 6 3/4 12 2 1 2.31 176 10 1000 74 52 1/8 1015/16 70 6 3/4 12 4 2 3.16 215 12 1200 82 60 7/8 109/16 78 6 3/4 12 4 2 3.65 245 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Refer to supply and return connections above for coil stub-out locations. 5. Not shown: optional drip lip, 3-speed fan switch; wall plate; 1/2-in. fiber- glass insulation on inside of casing, closed cell foam on main drain pan. 6. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 7. Valve package is factory-installed inside the cabinet when ordered with the unit (based on component size). 8. Dimensions shown in inches (mm). A42-4105 10 Fig. 6 — 42CG Horizontal Cabinet with Electric Heat Dimensions LEGEND 1—Junction Box, 4 in. x 4 in. 2—Optional Stamped Rear Return Grille 3—Drip Lip (optional, shipped loose) 4—Electric Strip Heater Element 5—Mounting Holes (4), Rubber Grommets have 3/8-in. Diameter Hole 6—Electrical Knockout, 7/8-in. Diameter 7—Return Knockout, 1-in. Diameter 8—Supply Knockout, 11/2-in. Diameter 9—Drain Knockout, 11/2-in. Diameter 10 —Drain Connection, 7/8-in. OD 11 —Valve Package (optional, inside cabinet) 12 —Filter 13 —Standard Stamped-Return Air Grille 14 —Removable Hinged Access Panel 15 —Supply, Return Connections, 5/8-in. OD 16 —Supply Grille, Stamped, Standard NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Refer to supply and return connections above for coil stub-out locations. 5. Not shown: 3-speed fan switch; wall plate; 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 6. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 7. Valve package is factory-installed inside the cabinet when ordered with the unit (based on component size). 8. Dimensions shown in inches (mm). *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ABCEFGBlower Motor 02 200 38 17 1/8 107/16 34 5 3/4 11 1 1 0.83 98 03 300 42 21 1/2 101/4 38 5 3/4 11 1 1 1.08 118 04 400 48 25 7/8 111/16 44 5 3/4 11 2 1 1.35 126 06 600 53 34 5/8 93/16 49 6 3/4 12 2 1 1.88 168 08 800 60 39 10 1/2 56 6 3/4 12 2 1 2.31 176 10 1000 74 52 1/8 1015/16 70 6 3/4 12 4 2 3.16 215 12 1200 82 60 7/8 109/16 78 6 3/4 12 4 2 3.65 245 A42-4106 11 Fig. 7 — 42CK Horizontal Cabinet Unit with Telescopic Access Panel, Front Supply, and Bottom Return Dimensions *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT BOTTOM RETURN FILTER SIZE (in.) UNIT WEIGHT* (lb)ABCDEFBlowerMotor 02 200 35 16 12 3/4 37 32 6 1 1 10 x 23 1/2 115 03 300 35 20 8 3/4 37 32 6 1 1 10 x 28 120 04 400 41 26 8 3/4 43 38 6 2 1 10 x 32 1/2 135 06 600 53 31 15 3/4 55 50 7 2 1 10 x 37 150 08 800 53 38 8 3/4 55 50 7 2 1 10 x 41 155 10 1000 75 52 16 3/4 77 72 7 4 2 10 x 54 1/2 227 12 1200 75 60 8 3/4 77 72 7 4 2 10 x 63 241 LEGEND 1 —Junction Box 2 —L-shape Drip Lip (optional, shipped loose) 3 —Chilled/Hot Water Supply and Return Connection 4 —Resilient Mounting Grommets with 3/8-in. Diameter Hole (typically 4) 5 —Electrical Knockout, 7/8-in. Diameter 6 —Drain Knockout, 11/2-in. Diameter 7 —Stamped Return Air Grille and 1-in. Filter 8 —Condensate Drain Connection, 7/8-in. OD 9 —Hinged Bottom Return Air Panel 10 —Supply Duct Collar, 1-in. OD A42-4149 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ± 1/4 inches. 4. Bottom panel is Arctic White polyester powder coat paint. 7 8 9 10 65 4 3 2 1 D 12 Fig. 8 — 42CK Horizontal Cabinet Unit with Telescopic Access Panel, Front Supply, Bottom Return, and Heater Dimensions 12 11 10 913 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. 4. Bottom panel is Arctic White polyester powder coat paint. *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT BOTTOM RETURN FILTER SIZE (in.) UNIT WEIGHT* (lb)ABCDEFBlowerMotor 02 200 35 16 12 3/4 37 32 6 1 1 10 x 23 1/2 117 03 300 35 20 8 3/4 37 32 6 1 1 10 x 28 122 04 400 41 26 8 3/4 43 38 6 2 1 10 x 32 1/2 137 06 600 53 31 15 3/4 55 50 7 2 1 10 x 37 152 08 800 53 38 8 3/4 55 50 7 2 1 10 x 41 157 10 1000 75 52 16 3/4 77 72 7 4 2 10 x 54 1/2 229 12 1200 75 60 8 3/4 77 72 7 4 2 10 x 63 243 a42-4150 LEGEND 1 —Contactor Box 2 —Strip Heater High Limit 3 —Electric Strip Heater Element 4 —L-shape Drip Lip (optional, shipped loose) 5 —Chilled/Hot Water Supply and Return Connection 6 —Resilient Mounting Grommets with 3/8-in. Diameter Hole (typically 4) 7 —Electrical Knockout, 7/8-in. Diameter 8 —Drain Knockout, 11/2-in. Diameter 9 —Stamped Return Air Grille and 1-in. Filter 10 —Condensate Drain Connection, 7/8-in. OD 11 —Hinged Bottom Return Air Panel 12 —Supply Duct Collar, 1-in. OD 13 —Drain Pan 13 Fig. 9 — 42CK Horizontal Cabinet Unit with Telescopic Access Panel, Front Supply, and Rear Return Dimensions *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT REAR RETURN FILTER SIZE (in.) UNIT WEIGHT* (lb)ABCDEFBlowerMotor 02 200 35 16 12 3/4 37 32 6 1 1 7 x 21 115 03 300 35 20 8 3/4 37 32 6 1 1 7 x 21 120 04 400 41 26 8 3/4 43 38 6 2 1 7 x 27 135 06 600 53 31 15 3/4 55 50 7 2 1 7 x 38 150 08 800 53 38 8 3/4 55 50 7 2 1 7 x 38 155 10 1000 75 52 16 3/4 77 72 7 4 2 7 x 52 227 12 1200 75 60 8 3/4 77 72 7 4 2 7 x 52 241 a42-4151 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. 4. Bottom panel is Arctic White polyester powder coat paint. LEGEND 1 —Junction Box 2 —1-in. Ducted Rear Return and 1-in. Filter 3 —L-shape Drip Lip (optional, shipped loose) 4 —Chilled/Hot Water Supply and Return Connection 5 —Resilient Mounting Grommets with 3/8-in. Diameter Hole (typically 4) 6 —Electrical Knockout, 7/8-in. Diameter 7 —Drain Knockout, 11/2-in. Diameter 8 —1-in. Ducted Rear Return and 1-in. Filter 9 —Condensate Drain Connection, 7/8-in. OD 10 —Hinged Bottom Return Air Panel 11 —Supply Duct Collar, 1-in. OD 8 9 10 11 76 5 4 3 21 14 Fig. 10 — 42CK Horizontal Cabinet Unit with Telescopic Access Panel, Front Supply, Rear Return, and Heater Dimensions NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. 4. Bottom panel is Arctic White polyester powder coat paint. *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT REAR RETURN FILTER SIZE (in.) UNIT WEIGHT* (lb)ABCDEFBlowerMotor 02 200 35 16 12 3/4 37 32 6 1 1 7 x 21 117 03 300 35 20 8 3/4 37 32 6 1 1 7 x 21 122 04 400 41 26 8 3/4 43 38 6 2 1 7 x 27 137 06 600 53 31 15 3/4 55 50 7 2 1 7 x 38 152 08 800 53 38 8 3/4 55 50 7 2 1 7 x 38 157 10 1000 75 52 16 3/4 77 72 7 4 2 7 x 52 229 12 1200 75 60 8 3/4 77 72 7 4 2 7 x 52 243 a42-4152 LEGEND 1 —Contactor Box 2 —Strip Heater High Limit 3 —Electric Strip Heater Element 4 —1-in. Ducted Rear Return and 1-in. Filter 5 —L-shape Drip Lip (optional, shipped loose) 6 —Chilled/Hot Water Supply and Return Connection 7 —Resilient Mounting Grommets with 3/8-in. Diameter Hole (typically 4) 8 —Electrical Knockout, 7/8-in. Diameter 9 —Drain Knockout,11/2-in. Diameter 10 —1-in. Ducted Rear Return and 1-in. Filter 11 —Condensate Drain Connection, 7/8-in. OD 12 —Hinged Bottom Return Air Panel 13 —Supply Duct Collar, 1-in. OD 14 —Drain Pan 14 15 Fig. 11 — 42CK Horizontal Cabinet Unit with Telescopic Access Panel Dimensions LEGEND 1—Junction Box, 4 in. x 4 in. 2—Drip Lip (optional, shipped loose) 3—Mounting Holes (4), Rubber Grommets have 3/8-in. Diameter Hole 4—Piping Knockout, 11/2-in. Diameter 5—Electrical Knockout, 7/8-in. Diameter 6—Drain Knockout, 11/2-in. Diameter 7—Supply Duct Collar 8—Return Connection, 5/8-in. OD 9—Optional Rear Return. Consult factory for collar dimensions 10 —Drain, 7/8-in. OD 11 —Stamped Bottom Return Air Grille 12 —Filter 13 —Stamped Air Supply Grille 14 —Hinged Bottom Access Panel 15 —Supply Connection, 5/8-in. OD *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ADEBlower Motor 02 200 35 37 32 1 1 0.83 115 03 300 35 37 32 1 1 1.08 120 04 400 41 43 38 2 1 1.35 135 06 600 53 55 50 2 1 1.88 150 08 800 53 55 50 2 1 2.31 155 10 1000 75 77 72 4 2 3.16 227 12 1200 75 77 72 4 2 3.65 241 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Bottom access panel has an Arctic White baked finish. 4. Refer to supply and return connections above for coil stub-out locations. 5. Not shown: 3-speed fan switch; wall plate; 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 6. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 7. Valve package is factory-installed inside the cabinet when ordered with the unit (based on component size). 8. Bottom return or bottom supply is an ETO (engineering to order) request. 9. Dimensions shown in inches (mm). A42-4107 16 Fig. 12 — 42CK Horizontal Cabinet with Telescopic Access Panel and Electric Heat Dimensions LEGEND 1—Junction Box, 4 in. x 4 in. 2—Strip Heater High Limit 3—Electric Strip Heater Element 4—Drip Lip (optional, shipped loose) 5—Mounting Holes (4), Rubber Grommets have 3/8-in. Diameter Hole 6—Piping Knockout, 11/2-in. Diameter 7—Electrical Knockout, 7/8-in. Diameter 8—Drain Knockout, 11/2-in. Diameter 9—Supply Duct Collar 10 —Optional Rear Return. Consult factory for collar dimensions. 11 —Drain, 7/8-in. OD 12 —Stamped Bottom Return Air Grille 13 —Filter 14 —Stamped Air Supply Grille 15 —Hinged Bottom Access Panel 16 —Supply Connection, 5/8-in. OD 17 —Return Connection, 5/8-in. OD NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-inch. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Bottom access panel has an Arctic White baked finish. 4. Refer to supply and return connections above for coil stub-out locations. 5. Not shown: 3-speed fan switch; wall plate; 1/2-in. fiberglass insulation on inside of casing; closed cell foam on main drain pan. 6. For optional coil connections, view 42CA-203-1 using the Fan Coil Builder. 7. Valve package is factory-installed inside the cabinet when ordered with the unit (based on component size). 8. Bottom return or bottom supply is an ETO (engineering to order) request. 9. Dimensions shown in inches (mm). *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ADEBlowerMotor 02 200 35 37 32 1 1 0.83 117 03 300 35 37 32 1 1 1.08 122 04 400 41 43 38 2 1 1.35 137 06 600 53 55 50 2 1 1.88 152 08 800 53 55 50 2 1 2.31 157 10 1000 75 77 72 4 2 3.16 229 12 1200 75 77 72 4 2 3.65 243 A42-4108 17 Fig. 13 — 42VA Furred-In Vertical Unit Dimensions FRONT VIEW *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDBlowerMotor 02 243/16 22 23 16 1 1 42 03 243/16 22 23 18 1 1 47 04 343/16 32 33 26 2 1 57 06 443/16 42 43 36 2 1 77 08 463/16 44 45 38 2 1 79 10 603/16 58 59 52 4 2 108 12 683/16 66 67 60 4 2 127 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. a42-4381 18 Fig. 14 — 42VA Furred-In Unit with Electric Heat Dimensions a42-4382 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDBlowerMotor 02 243/16 22 23 16 1 1 42 03 243/16 22 23 18 1 1 47 04 343/16 32 33 26 2 1 57 06 443/16 42 43 36 2 1 77 08 463/16 44 45 38 2 1 79 10 603/16 58 59 52 4 2 108 12 683/16 66 67 60 4 2 127 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. 19 Fig. 15 — 42VB Vertical Cabinet Unit Dimensions a42-4383 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDEBlowerMotor 02 41 22 23 17 1/4 31/8 1163 03 41 22 23 17 1/4 31/8 1168 04 51 32 33 26 3 3/4 2182 06 61 42 43 39 2 1/4 2199 08 63 44 45 39 3 1/4 2 1 101 10 77 58 59 52 1/8 35/8 4 2 133 12 85 66 67 61 3 1/4 4 2 154 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. 20 Fig. 16 — 42VB Vertical Cabinet Unit with Electric Heater Dimensions a42-4384 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDEBlowerMotor 02 41 22 23 17 1/4 31/8 1163 03 41 22 23 17 1/4 31/8 1168 04 51 32 33 26 3 3/4 2182 06 61 42 43 39 2 1/4 2199 08 63 44 45 39 3 1/4 2 1 101 10 77 58 59 52 1/8 35/8 4 2 133 12 85 66 67 61 3 1/4 4 2 154 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. 21 Fig. 17 — 42VF Vertical Cabinet Unit with Slant Top Dimensions *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDEBlowerMotor 02 41 22 23 17 1/4 31/8 1164 03 41 22 23 17 1/4 31/8 1169 04 51 32 33 26 3 3/4 2183 06 61 42 43 39 2 1/4 2 1 100 08 63 44 45 39 3 1/4 2 1 102 10 77 58 59 52 1/8 35/8 4 2 135 12 85 66 67 61 3 1/4 4 2 156 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. a42-4385 22 Fig. 18 — 42VF Vertical Cabinet Unit with Slant Top and Electric Heater Dimensions *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDEBlowerMotor 02 41 22 23 17 1/4 31/8 1164 03 41 22 23 17 1/4 31/8 1169 04 51 32 33 26 3 3/4 2183 06 61 42 43 39 2 1/4 2 1 100 08 63 44 45 39 3 1/4 2 1 102 10 77 58 59 52 1/8 35/8 4 2 135 12 85 66 67 61 3 1/4 4 2 156 NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Dimensions shown in inches (mm). All dimensions are ±1/4 inches. a42-4386 23 Fig. 19 — 42VC Furred-In Lowboy Unit Dimensions LEGEND 1—Optional Unit Mounted Control Box 2—Drain Pan, Auxiliary, Shipped Loose 3—Supply Conn, 5/8-in. OD 4—Drain, 3/4-in. MPT 5—Return Conn, 5/8-in. OD 6—Air Vent, 1/8-in. MPT 7—Discharge Opening 8—Filter *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ABCBlowerMotor 02 200232217211.18 50 03 300282722211.53 60 04 400363530212.08 72 06 600 50 49 44 4 2 3.06 110 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-inch. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Standard 2-row coil shown. 4. Optional unit-mounted switch box and controls, when specified, are installed on opposite side from cooling connections. 5. Height increases by 2 in. with electric heat. 6. Not shown: 3-speed fan switch, 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 7. Units have galvanized finish. 8. For optional coil connections, view 42VC-203-1 using the Fan Coil Builder. 9. Dimensions shown in inches (mm).A42-4112 14-3/8 (368) 24 Fig. 20 — 42VC Furred-In Lowboy Unit with Electric Heat Dimensions LEGEND 1—Unit-Mounted Control Box (Optional) 2—Drain Pan, Auxiliary, Shipped Loose 3—Air Vent, 1/8-in. MPT 4—Supply Conn, 5/8-in. OD 5—Drain, 3/4-in. MPT 6—Return Conn, 5/8-in. OD 7—Filter 8—Electrical Sheath Heater Element 9—Discharge Opening *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ABCBlowerMotor 02 200 23 22 17 2 1 1.18 50 03 300 28 27 22 2 1 1.53 60 04 400 36 35 30 2 1 2.08 72 06 600 50 49 44 4 2 3.06 110 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-inch. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Standard 2-row coil shown. 4. Optional unit-mounted switch box and controls, when specified, are installed on opposite side from cooling connections. 5. Height increases by 2 in. with electric heat. 6. Not shown: 3-speed fan switch, 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 7. Units have galvanized finish. 8. For optional coil connections, view 42VC-203-1 using the Fan Coil Builder. 9. Dimensions shown in inches (mm).A42-4113 25 Fig. 21 — 42VE Cabinet Lowboy Unit Dimensions *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ABCDBlowerMotor 02 200 41 22 33/4 17 2 1 1.18 72 03 300 46 27 4211/2 2 1 1.53 100 04 400 54 35 35/8 301/4 2 1 2.08 108 06 600 68 49 41/16 433/8 4 2 3.06 154 LEGEND 1—Fan Switch, 3-Speed, behind Access Door 2—Front Panel Fastener 3—Stamped Supply Grille 4—Supply Conn, 5/8-in. OD 5—Return Conn, 5/8-in. OD 6—Stamped Return Grille 7—Filter 8—Air Vent, 1/8-in. MPT 9—Optional Valve Package (inside cabinet) 10 —Drain Pan, Auxiliary, with 3/4-in. MPT Drain Connection 11 —Return Air Grille NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-inch. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Height increases by 2 in. with electric heat. 5. Standard 2-row coil shown. 6. Not shown: 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 7. For optional coil connections, view 42VC-203-1 using the Fan Coil Builder. 8. Valve package is factory-installed inside the cabinet when ordered with the unit (based on component size). 9. Dimensions shown in inches (mm). A42-4114 14-3/8(368) 26 Fig. 22 — 42VE Cabinet Lowboy Unit with Electric Heat Dimensions *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT FACE AREA (sq ft) UNIT WEIGHT* (lb)ABCDBlowerMotor 02 200 41 22 3 3/4 17 2 1 1.18 72 03 300 46 27 4 21 1/2 2 1 1.53 100 04 400 54 35 3 5/8 301/4 2 1 2.08 108 06 600 68 49 4 1/16 433/8 4 2 3.06 154 LEGEND 1—Fan Switch, 3-Speed, behind Access Door 2—Electrical Sheath Heater Element 3—Stamped Supply Grille 4—Supply Conn, 5/8-in. OD 5—Return Conn, 5/8-in. OD 6—Stamped Return Grille 7—Filter 8—Air Vent, 1/8-in. MPT 9—Front Panel Fastener 10 —Optional Valve Package (inside cabinet) 11 —Drain Pan, Auxiliary, with 3/4-in. MPT Drain Connection 12 —Return Air Grille NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-inch. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Height increases by 2 in. with electric heat. 5. Standard 2-row coil shown. 6. Not shown: 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 7. For optional coil connections, view 42VC-203-1 using the Fan Coil Builder. 8. Valve package is factory-installed inside the cabinet when ordered with the unit (based on component size). 9. Dimensions shown in inches (mm).A42-4115 27 Fig. 23 — 42VG Furred-In Wall Unit Dimensions LEGEND 1—Supply Conn, 5/8-in. OD 2—Air Vent, 1/8-in. MPT 3—Filter 4—Return Air Grille, Stamped 5—Stamped Supply Grille 6—Return Conn, 5/8-in. OD 7—Removable Front Panel 8—Drain Conn, 7/8-in. OD 9—Auxiliary Drain Pan 10 —Valve Compartment 11 —Junction Box NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-inch. 2. Front panel has an Arctic White baked finish. 3. Standard 2-row coil shown. 4. Unit size 01 has one motor, one blower; size 03 has 2 motors, 2 blowers. 5. Unit has 1/2-in. flanges for mounting to wall surface. 6. Front panel hooks at top of unit, swing down and snap in at bottom against a spring clip. 7. Not shown: 3-speed fan switch, wall plate, 1/2-in. fiberglass insula- tion on inside of casing, closed cell foam on main drain pan. 8. Dimensions shown in inches (mm). *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (Cfm) DIMENSIONS (in.) QTY/UNIT UNIT WEIGHT* (lb)ABCDEBlowerMotor 01 150 25 3/4 153/4 14 1 1/2 123/4 1140 03 300 39 3/4 293/4 28 1 15/16 257/8 2274 A42-4116 28 Fig. 24 — 42DA Furred-In Ceiling Unit with Electric Heat Dimensions UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in. ± 1/8) QTY/UNIT UNIT WEIGHT* (lb)AA’BD’EHBlowerMotor 06 600 23 32 14 13 1/2 17 18 1/2 11 64 08 800 28 37 19 13 1/2 22 23 1/2 11 79 10 1000 32 42 23 14 1/2 26 27 1/2 11 90 12 1200 37 47 28 14 1/2 31 32 1/2 2 2 108 14 1400 42 52 33 14 1/2 36 37 1/2 2 2 119 16 1600 47 56 38 13 1/2 41 42 1/2 2 2 124 18 1800 52 62 43 14 1/2 46 47 1/2 2 2 141 20 2000 56 66 47 14 1/2 50 51 1/2 2 2 151 LEGEND 1—Motor Junction Box 2—Motor-Blower Assembly 3—Electric Strip Heater Element (optional) 4—Auxiliary Drip Lip (optional, shipped loose) 5—Tell-Tale Drain (optional) 6—Drain Connection, 7/8-in. OD 7—Air Vent, 1/8-in. MPT 8—Supply Connection 9—Supply Duct Collar, 1 in. 10 —Return Connection 11 —Mounting Holes (four, 3/4-in. diameter) have Rubber Grommets with 3/8-in. holes. a42-4120 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8 inch. 2. Sizes 06, 08 and 10 have one motor, one blower; sizes 12 through 20 have 2 motors, 2 blowers. 3. Standard 4-row coil shown. Other coil option dimensional data available on request. 4. For optional coil connections, view 42DA-203-1 using the Fan Coil Builder. 5. Fan switch, wall plate not shown. 6. Galvanized finish provided as standard. 7. Dimensions are in inches (mm). 29 Fig. 25 — 42DC Furred-In Ceiling Unit with Plenum and Electric Heat Dimensions UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in. ± 1/8) QTY/UNIT UNIT WEIGHT* (lb)A A’ B D’ E F G H Blower Motor 06 600 23 32 14 13 1/2 17 21 25 1/4 181/2 11 94 08 800 28 37 19 13 1/2 22 26 30 1/4 231/2 1 1 107 10 1000 32 42 23 14 1/2 26 30 34 1/4 271/2 1 1 150 12 1200 37 47 28 14 1/2 31 35 39 1/4 321/2 2 2 169 14 1400 42 52 33 14 1/2 36 40 44 1/4 371/2 2 2 174 16 1600 47 56 38 13 1/2 41 45 49 1/4 421/2 2 2 178 18 1800 52 62 43 14 1/2 46 50 54 1/4 471/2 2 2 195 20 2000 56 66 47 14 1/2 50 54 58 1/4 511/2 2 2 220 LEGEND 1—Motor Junction Box Opposite Piping 2—Insulated Return Air Plenum 3—Mounting Clips (shipped loose) 4—Electrical Strip Heater Element (optional) 5—Auxiliary Drip Lip (shipped loose) with 3/8-in. Hole 6—Tell-Tale Drain (optional) 7—Drain Connection, 7/8-in. OD 8—Filter Retainer Angle 9—Access Panel 10 —Return Duct Collar, 21/2 in. 11 —Air Vent, 1/8-in. MPT 12 —Return Connection 13 —Filter, 1-in. 14 —Supply Duct Collar, 1 in. 15 —Supply Connection 16 —Mounting Holes (four, 3/4-in. diameter) with Rubber Grommet A42-4121 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8 inch. 2. Sizes 06, 08 and 10 have one motor, one blower. Sizes 12 through 20 have 2 motors, 2 blowers. 3. Filter and filter rack are standard. 4. Standard 4-row coil shown. Other coil option dimensional data available on request. 5. For optional coil connections, view 42DA-203-1 using the Fan Coil Builder. 6. Fan switch, wall plate not shown. 7. Galvanized finish provided as standard. 8. Dimensions are in inches (mm). 30 Fig. 26 — 42DD Vertical Unit with Full Casing and Electric Heat Dimensions UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in. ± 1/8) QTY/UNIT UNIT WEIGHT* (lb)ABCBlower Motor 06 600 23 21 15 1 1 135 08 800 28 26 20 1 1 145 10 1000 32 30 24 1 1 155 12 1200 37 35 29 2 2 180 14 1400 42 40 34 2 2 190 16 1600 47 45 39 2 2 200 18 1800 52 50 44 2 2 215 20 2000 56 54 48 2 2 230 LEGEND 1—Motor Junction Box 2—Air Vent, 1/8-in. MPT 3—Return Connection 4—Optional 6-in. Legs 5—Bottom Return (optional) 6—Return Air Opening 7—Supply Connection 8—Drain Connection, 7/8-in. OD 9—Front Access Panel 10 —Filter, Throwaway 11 —Electric Strip Heater Element (optional) 12 —Supply Duct Connection, 1-in. A42-4122 SEE NOTE 8 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8 inch. 2. Standard 4-row coil shown. Other coil option dimensional data available on request. 3. Sizes 06, 08 and 10 have one motor, one blower. Sizes 12 through 20 have 2 motors, 2 blowers. 4. Supply and return connections terminate within unit when valves are factory installed. 5. For optional coil connections, view 42DD-203-1 using the Fan Coil Builder. 6. Fan switch and wall plate are not shown. 7. Galvanized finish provided as standard. 8. Units with internal factory valve packages have external connections located in triangular section above coil. 9. Consult Carrier for ducted front return air and external filter rack with 1-in. duct collar and throwaway filters. 10. Units with electric heat require additional access on the side of unit for servicing contactor box. 11. With bottom return, access to filter is through the front access panel. 12. Dimensions are in inches (mm). 31 Fig. 27 — 42DE Ceiling Unit with Full Casing and Electric Heat Dimensions UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in. ± 1/8) QTY/UNIT UNIT WEIGHT* (lb)ABCDBlower Motor 06 600 31 15 15 26 1 1 150 08 800 36 20 20 31 1 1 160 10 1000 40 24 24 35 1 1 170 12 1200 45 29 29 40 2 2 195 14 1400 50 34 34 45 2 2 205 16 1600 55 39 39 50 2 2 215 18 1800 60 44 44 55 2 2 230 20 2000 64 48 48 59 2 2 235 LEGEND 1—Motor Junction Box 2—Unit Mounting Channel (2), 14-gage; 4 Mounting Slots, 1/2-in. x 2-in. 3—Auxiliary Drip Lip (optional, shipped loose) 4—Side Access Panels 5—Electrical Strip Heater Element (optional) 6—Supply Air Duct Connection, 1 in. 7—Manual Air Vent 8—Filter, Throwaway, 1-in. 9—Return Air Duct Connection, 21/2 in. 10 —Drain, 7/8-in. OD 11 —Bottom Access Panel 12 —Drain Pan 13 —Coil Inlet, Copper Sweat Connection 14 —Coil Outlet, Copper Sweat Connection A42-4123 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Coil stub-out location data available on request. 3. Unit fabricated of galvanized steel. 4. Internal parts fabricated of galvanized steel. 5. Sizes 06, 08 and 10 have one motor, one blower. Sizes 12 through 20 have 2 motors, 2 blowers. 6. Units must have drain line pitched and trapped externally. 7. For optional coil connections, view 42DA-203-1 using the Fan Coil Builder. 8. Fan switch, wall plate not shown. 9. Galvanized finished provided as standard. 10. Dimensions are in inches (mm). 32 Fig. 28 — 42DF Exposed Ceiling Unit with Supply and Return Grille and Electric Heat Dimensions UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in. ± 1/8)QTY/UNITUNIT WEIGHT* (lb)ABCDEBlowerMotor 06 600 31 13 1/2 14 26 8 1/2 1 1 150 08 800 36 18 1/2 20 31 8 1 1 160 10 1000 40 22 1/2 24 35 8 1 1 170 12 1200 45 27 1/2 28 40 8 1/2 2 2 195 14 1400 50 32 1/2 34 45 8 2 2 205 16 1600 55 37 1/2 38 50 8 1/2 2 2 215 18 1800 60 42 1/2 44 55 8 2 2 230 20 2000 64 46 1/2 48 59 8 2 2 235 LEGEND 1—Junction Box 2—Return Air Grille, Hinged, Bar Type, with Filter Frame (Anodized Aluminum Only) 3—Unit Mounting Channel (2), 14-gage; 4 Mounting Slots, 1/2 in. x 2-in. 4—Auxiliary Drip Lip 5—Electric Strip Heater Element (optional) 6—Coil Inlet, Copper Sweat Connection 7—Coil Outlet, Copper Sweat Connection 8—Manual Air Vent 9—Filter, Throwaway 10 —Bottom Access Panel 11 —Drain, 7/8-in. OD 12 —Drain Pan Insulated with Styrofoam 13 —Side Access Panel (2) 14 —Supply Air Grille (Double Deflection) A42-4124 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Coil stub-out connection data available on request. 3. Units fabricated of galvanized steel with an Arctic White baked finish. 4. Internal parts fabricated of galvanized steel. 5. Sizes 06, 08 and 10 have one motor, one blower. Sizes 12 through 20 have 2 motors, 2 blowers. 6. Units must have drain line pitched and trapped externally. 7. Stamped supply and return grilles are not available. 8. Bottom return air is not available. 9. For optional coil connections, view 42DA-203-1 using the Fan Coil Builder. 10. Fan switch and wall plate are not shown. 11. Dimensions are in inches (mm). 33 Fig. 29 — 42SG Furred-In Stack Dimensions 24 †Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in.)UNIT WEIGHT† (lb) Single Supply Double Supply Top Supply EGH IABA BCD 03 300 14 8 14 6 14 10 17 11/2 11/2 14 180 04 400 14 12 14 6 14 10 17 11/2 11/2 14 225 06 600 18 10 18 6 16 12 20 1 2 18 240 08 800 18 12 18 6 16 12 20 1 2 18 260 10 1000 — — 22 8 18 16 24 1 3 22 280 12 1200 — — 22 8 18 16 24 1 3 22 305 A42-4125 LEGEND CR —Cold Water Return CS —Cold Water Supply D—Drain HR —Hot Water Return HS —Hot Water Supply R—Return S—Supply **Factory-Installed.††Field-Installed. ITEM DESCRIPTION QTY 1 Electrical Knockouts 1 2 3-in. Expanded Section 3/5 3 Strip Heater (Optional) 1 4 Limit Switch**†† (Optional) 1 5 1/2-in. Isolation Ball Valves**2/4 6 Flexible Drain Tube/P-Trap 1 7 Coil 1/2-in. OD Copper Tube 1 8 Filter, Throwaway, 1-in.** 1 9 Return Air Opening 1 10 Air Vent, Manual 1 11 Molex Connector for Field-Installed Stat 1 12 Control Box 1 13 Knockout (For Optional Remote Mounting) 2 14 Riser, Supply and Return (Copper) 2/4 15 Riser, Drain (Copper) 1 16 Drain Pan 1 17 Acoustical Bypass Panel 1 18 Blower 1 19 Motor, 3-Speed, PSC, with Quick Connect 1 20 Access Panel (Control Box) 1 21 Control Opening (Surface Mount Stat) 1 22 Duct Collar, 1/2-in. Extension (Typical)1/2/3 23 Supply Air Opening(s) 1/2/3 24 Top Supply Collar 1-in Extension (Optional)1 *Drawing provided for reference only. Dimensions may vary with options ordered. NOTES: 1. Units are fabricated of galvanized steel with a 16-gage galvanized fan deck. 2. All risers are insulated with ( 1/2-in. or 3/4-in. thick) closed cell insulation. 3. Thermostats shipped loose for field connection. 4. Risers are piped to coil with valves as specified. 5. Blower, motor, valves, coil, and filter are accessible through the return air opening. 6. Unit and control box are insulated. 7. Riser length = [(floor to floor) +2 in.], maximum riser length = 119 inches. 8. Maximum riser size is 2 1/2-in. diameter. If larger sizes are required, please consult the factory. 9. Expansion loops in hot water heating circuits as required. 10. A 9-in. x 2 1/4-in. slot is provided in the inside back panel for coil connection penetration to permit expansion and contraction of risers. Care must be taken to position the risers so that coil connection is at center of slot. 11. Drawing is pictorial (see unit arrangements for actual supply and return air orientation). 12. All dimensions are in inches. 34 Fig. 30 — 42SH Cabinet Dimensions 23 22 21 20 19 †Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in.)UNIT WEIGHT† (lb) Single Supply Double Supply CDEFGABAB 03 300 14 8 14 6 17 22 3/8 21/2 221/8 143/4 202 04 400 14 12 14 8 17 22 3/8 21/2 221/8 143/4 247 06 600 14 12 14 8 20 25 3/8 21/2 265/8 173/4 262 08 800 14 16 14 10 20 25 3/8 21/2 265/8 173/4 286 10 1000 18 16 14 12 24 29 3/8 21/2 311/8 173/4 311 12 1200 18 16 14 12 24 29 3/8 21/2 311/8 173/4 336 *Drawing provided for reference only. Dimensions may vary with options ordered. NOTES: 1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck, painted with Arctic White. 2. Risers are piped to coil with valves as specified. 3. Blower, motor, valves, coil, and filter are accessible through the return air opening. 4. Unit and control box are insulated. 5. Riser length = [(floor to floor) +2 in.], maximum riser length = 119 inches. 6. Maximum riser size is 21/2-in. diameter. If larger sizes are required, please consult the factory. 7. Expansion loops in hot water heating circuits as required. 8. A 9-in. x 21/4-in. slot is provided in the inside back panel for coil connection penetration to permit expansion and contraction of risers. Care must be taken to position the risers so that coil connection is at center of slot. 9. Drawing is pictorial (see unit arrangements for actual supply and return air orientation). 10. 42SHA available in front return only. 11. All dimensions are in inches.a42-4303 **Factory-Installed. ††Field-Installed. ITEM DESCRIPTION QTY 1 Full Riser Chase 1 2 Electrical Knockouts 1 3 3-in. Expansion Section 3/5 4 Strip Heater (Optional) 1 5 Limit Switch**†† (Optional) 1 6 1/2-in. Isolation Ball Valves**2/4 7 Flexible Drain Tube/P-Trap 1 8 Drain Pan 1 9 Coil 1/2-in. OD Tube 1 10 Filter, Throwaway, 1-in.** 1 11 Air Vent, Manual 1 12 Control Box 1 13 Cabinet Camloc® Fasteners 2 14 3-Speed Switch (Optional)1 15 Electrical Access Panel 1 16 Riser, Supply and Return (Copper) 2/4 17 Riser, Drain (Copper) 1 18 Return Air Panel 1 19 Motor, 3-Speed, PSC 1 20 Blower 1 21 Thermostat (Optional) 1 22 Hinged Control Access Door 1 23 Double Deflection Steel Core Grille Assembly 1 LEGEND CR —Cold Water ReturnCS —Cold Water SupplyD—DrainHR —Hot Water ReturnHS —Hot Water SupplyR—ReturnS—Supply 35 Fig. 31 — 42SJ Back-to-Back Furred-In Stack Dimensions 26 †Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in.)UNIT WEIGHT† (lb) Single Supply Double Supply Top Supply EGHI JABABCD 03 300 14 8 14 6 14 10 17 11/2 11/2 14 395/8 360 04 400 14 12 14 6 14 10 17 11/2 11/2 14 395/8 450 06 600 18 10 18 6 16 12 20 1 2 18 455/8 480 08 800 18 12 18 6 16 12 20 1 2 18 455/8 520 10 1000 ——22 81816241 322535/8 560 12 1200 ——22 81816241 322535/8 610 *Drawing provided for reference only. Dimensions may vary with options ordered.NOTES:1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck.2. All risers are insulated with closed cell insulation.3. Thermostats shipped loose for field connection.4. Risers are piped to coil with valves as specified.5. Blower, motor, valves, coil, and filter are accessible through the return air opening.6. Unit and control box are insulated.7. Riser length = [(floor to floor) +2 in.], maximum riser length = 119 inches.8. Maximum riser size is 2 1/2-in. diameter. If larger sizes are required, please consult the factory.9. Expansion loops in hot water heating circuits as required.10. A 9-in. x 2 1/4-in. slot is provided in the inside back panel for coil connection penetration to permit expansionand contraction of risers. Care must be taken to position the risers so that coil connection is at center of slot.11. Drawing is pictorial (see unit arrangements for actual supply and return air orientation).12. All dimensions are in inches. **Factory-Installed. ††Field-Installed. ITEM DESCRIPTION QTY 1 Electrical Knockouts 6 2 Gypsum Board, 5/8-in. Type “X” 1 3 3-in. Expanded Section 3/5 4 Strip Heater**(Optional) 2 5 Limit Switch**†† (Optional) 2 6 1/2-in. Isolation Ball Valves** 4/8 7 Thermafiber Insulation 2 8 Flexible Drain Tube/P-Trap 2 9 Coil 1/2-in. OD Copper Tube 2 10 Filter, Throwaway, 1-in.** 2 11 Return Air Opening 2 12 Air Vent, Manual 2 13 Knockout (For Optional Remote Mounting) 2 14 Molex Connector for Field Installed Stat 2 15 Control Box 2 16 Riser, Drain (Copper) 1 17 Riser, Supply and Return (Copper) 2/4 18 Drain Pan 2 19 Return Air Blockoff Panel (Optional)1 20 Blower 2 21 Motor, 3-Speed, PSC, with Quick Connect 2 22 Access Panel (Control Box) 2 23 Control Opening (Surface Mount Stat) 2 24 Duct Collar, 1/2-in. Extension (Typical)1/2/3 25 Supply Air Opening(s) 1/2/3 26 Top Supply Duct Collar, 1-in. Extension (Optional)1 LEGEND CR—Cold Water Return CS —Cold Water Supply D—Drain HR—Hot Water Return HS —Hot Water Supply R—Return S—Supply A42-4304 36 Fig. 32 — 42SGM Furred-In Master Stack Dimensions 24 †Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE NOM AIRFLOW (cfm) DIMENSIONS (in.)UNIT WEIGHT† (lb) Single Supply Double Supply Top Supply EGH IABA BCD 03 300 14 8 14 6 14 10 17 11/2 11/2 14 180 04 400 14 12 14 6 14 10 17 11/2 11/2 14 225 06 600 181018 61612201 218 240 08 800 181218 61612201 218 260 10 1000 ——22 81816241 322 280 12 1200 ——22 81816241 322 305 A42-4128 **Factory-Installed. ††Field-Installed. ITEM DESCRIPTION QTY 1 Electrical Knockouts 1 2 3-in. Expanded Section 3/5 3 Strip Heater** (Optional) 1 4 Limit Switch**†† (Optional) 1 5 1/2-in. Isolation Ball Valves** 2/4 6 Flexible Drain Tube/P-Trap 1 7 Coil 1/2-in. OD Copper Tube 1 8 Filter, Throwaway, 1-in.** 1 9 Return Air Opening 1 10 Air Vent, Manual 1 11 Knockout (For Optional Remote Mounting) 2 12 Molex Connector for Field-Installed Thermo- stat 1 13 Control Box 1 14 Riser, Supply and Return (Copper) 2/4 15 Riser, Drain (Copper) 1 16 Drain Pan 1 17 Acoustical Bypass Panel 1 18 Blower 1 19 Motor, 3-Speed, PSC, with Quick Connect 1 20 Access Panel (Control Box) 1 21 Control Opening (Surface Mount Thermostat) 1 22 Duct Collar, 1/2-in. Extension (Typical)1/2/3 23 Supply Air Opening(s) 1/2/3 24 Top Supply Duct Collar, 1-in. Extension (Optional)1 LEGEND CR—Cold Water ReturnCS —Cold Water SupplyD—DrainHR—Hot Water ReturnHS —Hot Water SupplyR—ReturnS—Supply *Drawing provided for reference only. Dimensions may vary with options ordered. NOTES: 1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck. 2. All risers are insulated with closed cell insulation. 3. Thermostats shipped loose for field connection. 4. Risers are piped to coil with valves as specified. 5. Blower, motor, valves, coil, and filter are accessible through the return air opening. 6. Unit and control box are insulated. 7. Riser length = [(floor to floor) +2 in.], maximum riser length = 119 inches. 8. Maximum riser size is 21/2-in. diameter. If larger sizes are required, please consult the factory. 9. Expansion loops in hot water heating circuits as required. 10. A 9-in. x 21/4-in. slot is provided in the inside back panel for coil connection penetration to permit expansion and contraction of risers. Care must be taken to position the risers so that coil connection is at center of slot. 11. Drawing is pictorial (see unit arrangements for actual supply and return air orientation). 12. All dimensions are in inches. 37 Fig. 33 — 42SGS Furred-In Slave Stack Dimensions 23 *Drawing provided for reference only. Dimensions may vary with options ordered. NOTES: 1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck. 2. All risers are insulated with closed cell insulation. 3. Thermostats shipped loose for field connection. 4. Risers are piped to coil with valves as specified. 5. Blower, motor, valves, coil, and filter are accessible through the return air opening. 6. Unit and control box are insulated. 7. Riser length = [(floor to floor) +2 in.], maximum riser length = 119 inches. 8. Maximum riser size is 21/2-in. diameter. If larger sizes are required, please consult the factory. 9. Expansion loops in hot water heating circuits as required. 10. A 9-in. x 21/4-in. slot is provided in the inside back panel for coil connection penetration to permit expansion and contraction of risers. Care must be taken to position the risers so that coil connection is at center of slot. 11. Drawing is pictorial (see unit arrangements for actual supply and return air orientation). 12. All dimensions are in inches. †Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNITSIZE NOM AIRFLOW (cfm) DIMENSIONS (in.)UNIT WEIGHT† (lb)Single Supply Double Supply Top Supply EGH IABABCD 03 300 14 8 14 6 14 10 17 1 1/2 11/2 14 162 04 400 14 12 14 6 14 10 17 1 1/2 11/2 14 203 06 600 18 10 18 6 16 12 20 1 2 18 216 08 800 18 12 18 6 16 12 20 1 2 18 234 10 1000 — — 22 8 18 16 24 1 3 22 252 12 1200 — — 22 8 18 16 24 1 3 22 275 A42-4129 **Factory-Installed. ††Field-Installed. ITEM DESCRIPTION QTY 1 Electrical Knockouts 1 2 Strip Heater** (Optional) 1 3 Limit Switch**†† (Optional) 1 4 1/2-in. Isolation Ball Valves** 2/4 5 Coil Stub Outs 2/4 6 Shipping Brace 2/4 7 Flexible Drain Tube/P-Trap 1 8 Coil 1/2-in. OD Copper Tube 1 9 Filter, Throwaway, 1-in.** 1 10 Return Air Opening 1 11 Air Vent, Manual 1 12 Knockout (For Optional Remote Mounting) 2 13 Molex Connector for Field-Installed Stat 1 14 Control Box 1 15 Drain Pan 1 16 Return Air Blockoff Panel (Optional) 1 17 Blower 1 18 Motor, 3-Speed, PSC, with Quick Connect 1 19 Access Panel (Control Box) 1 20 Control Opening (Surface Mount Thermo- stat)1 21 Duct Collar, 1/2-in. Extension (Typical)1/2/3 22 Supply Air Opening(s) 1/2/3 23 Top Supply Duct Collar 1-in. Extension (Optional)1 LEGEND CR—Cold Water Return CS —Cold Water Supply D—Drain HR—Hot Water Return HS —Hot Water Supply R—Return S—Supply 38 Fig. 34 — 42SU Universal Furred-In Stack Dimensions 8(203) 51(1295) I E 19 8 14 23 15 22 10 11 9 3 5 2 E 63 (1600) 21 12 13 17 7 6 16 A B F 39(991) 5(127) 1-1/4(32) 4(102) 88(2235) H R H S C R C S D 1-1/4(32) HCH HR CR CSHS D 3-5/8(92) 3-5/8(92) 3(76)3(76) 4 1-1/4(32) 20 18 1 DETAIL SIDE VIEWTOP VIEW FRONT VIEW SIDE VIEW *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE UNIT WEIGHT* (lb) DIMENSIONS (in.) FILTER SIZE (in.)Side Supply Top Supply AB Size CD Size EFHI 03 180 14 12 14 x 12 14 10 14 x 10 17 3 11/2 14 121/2 x 241/4 x 104225 06 240 18 12 18 x 12 16 12 16 x 12 20 1 2 18 161/4 x 263/4 x 108260 10 280 22 16 22 x 16 18 16 18 x 16 24 1 3 22 201/2 x 291/4 x 112305 NOTES: 1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck. 2. Thermostats shipped loose for field connection. 3. Blower, motor, valves, coil, and filter are accessible through the return air opening. 4. Unit and control box are insulated with 1/2-in. (13 mm) coated fiberglass insulation. 5. All risers will ship separately from units. Riser dimensions are measured from centerline of knockout. 6. Drain knockouts on three sides of cabinet. 7. Flex hoses ship with unit. 8. Thread fittings on both ends of flex hoses must be field tightened and leak tested. 9. Return air panel not shown. 10. All dimensions are in inches (mm). LEGEND CR —Cold Water Return CS —Cold Water Supply D—Drain HR —Hot Water Return HS —Hot Water Supply PSC —Permanent Split Capacitor SWT —Sweat Item Description Qty 1 Float Switch (Optional) 1 2 Drain Pan 1 3 Flexible Drain Tube/P-Trap 1 4 Drain Knockout (3 Sides)1 each side 5 Blower 1 6 Riser Knockouts (3 Sides) 2/4 7 1/2 in. Flare Adaptor (SWT x 37.5) 2/4 8 Coil, 1/2 in. OD Copper Tube 1 9 1 in. Throwaway Filter (Factory Installed)1 10 Manual Air Vent 1 11 Return Air Opening 1 12 Knockout (For Optional Thermostat Remote Mounting)3 13 Molex Connector for Field-Installed Thermostat 1 14 Control Box 1 15 Duct Collar Extension (1/2 in. Side, 1 in. Top)1/2/3 16 Outside Air Knockout (On Each Side Panel)1 17 Electrical Knockouts (Near Each Side)1 18 Service Switch (Optional) 1 19 Motor, 3-Speed, PSC, with Quick Connect 1 20 Access Panel for Motor and Blower Assembly 1 21 Access Panel (Control Box) 1 22 Control Opening Knockout (Surface Mount Thermostat)1 23 Supply Air Openings (4 Sides and Top, Stitch Cut)1/2/3 a42-4305 39 Fig. 35 — 42SU Universal Furred-In Stack with Heater Dimensions 6 5 8 (203) 51(1295) I E 21 10 16 25 17 24 12 13 11 3 7 2 E 63 (1600) 23 14 15 19 9 8 18 A B F 39 (991) 5 (127) 1-1/4 (32) 4 (102) 88 (2235) H R H S C R C S D 1-1/4 (32) HCH HR CR CSHS D 3-5/8 (92) 3-5/8 (92) 3 (76)3 (76) 4 1-1/4 (32) 1 22 20 TOP VIEW FRONT VIEW SIDE VIEW DETAIL SIDE VIEW *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. UNIT SIZE UNIT WEIGHT* (lb) DIMENSIONS (in.)FILTER SIZE (in.)Side Supply Top Supply AB Size CD Size EFHI 03 182 14 12 14 x 12 14 10 14 x 10 17 3 11/2 14 121/2 x 241/4 x 104227 06 242 18 12 18 x 12 16 12 16 x 12 20 1 2 18 161/4 x 263/4 x 108262 10 282 22 16 22 x 16 18 16 18 x 16 24 1 3 22 201/2 x 291/4 x 112307 NOTES: 1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck. 2. Thermostats shipped loose for field connection. 3. Blower, motor, valves, coil, and filter are accessible through the return air opening. 4. Unit and control box are insulated with 1/2-in. (13 mm) coated fiberglass insulation. 5. All risers will ship separately from units. Riser dimensions are measured from centerline of knockout. 6. Drain knockouts on three sides of cabinet. 7. Flex hoses ship with unit. 8. Thread fittings on both ends of flex hoses must be field tightened and leak tested. 9. Return air panel not shown. 10. All dimensions are in inches (mm). LEGEND CR —Cold Water Return CS —Cold Water Supply D—Drain HR —Hot Water Return HS —Hot Water Supply PSC —Permanent Split Capacitor SWT —Sweat Item Description Qty 1 Float Switch (Optional) 1 2 Drain Pan 1 3 Flexible Drain Tube/P-Trap 1 4 Drain Knockout (3 Sides)1 each side 5 Limit Switch (Factory Installed) 1 6 Strip Heater 1 7 Blower 1 8 Riser Knockouts (3 Sides) 2/4 9 1/2 in. Flare Adaptor (SWT x 37.5) 2/4 10 Coil, 1/2 in. OD Copper Tube 1 11 1 in. Throwaway Filter (Factory Installed)1 12 Manual Air Vent 1 13 Return Air Opening 1 14 Knockout (For Optional Thermostat Remote Mounting)3 15 Molex Connector for Field-Installed Thermostat 1 16 Control Box 1 17 Duct Collar Extension (1/2 in. Side, 1 in. Top)1/2/3 18 Outside Air Knockout (On Each Side Panel)1 19 Electrical Knockouts (Near Each Side)1 20 Service Switch (Optional) 1 21 Motor, 3-Speed, PSC, with Quick Connect 1 22 Access Panel for Motor and Blower Assembly 1 23 Access Panel (Control Box) 1 24 Control Opening Knockout (Surface Mount Thermostat)1 25 Supply Air Openings (4 Sides and Top, Stitch Cut)1/2/3 a42-4306 40 Fig. 36 — 42SM Mega Furred-In Stack Dimensions 30 (762) 28(711) SWT X 37.5 FLARE ADAPTER ACOUSTICAL SERVICE ACCESS PANEL FLEXIBLE DRAIN TUBE/P-TRAP FILTER RISER KNOCKOUTS (OPTIONAL) RETURN AIR PANEL DRAIN PAN SUPPLY AIR OPENING CONTROL BOX COIL MOTOR/BLOWER, 3 SPEED, PSC, HIGH STATIC 24 (610) 5 (127) 66* (1676) 59(1499) 39(991) SUPPLY TOP DUCT COLLAR, 1"(25) (OPTIONAL) INTERLOCKING DISCONNECT SWITCH ELECTRICALKNOCKOUTS 5 (127) 3 (76) 3 (76) DHS CR 1-1/4 (32) 3 (76) 11(280) 24(610) 3 (76) 3 (76) 3-5/8(92)3-5/8 (92)DHS CSCRHR 1-1/4 (32) 3(76) 11(280) 24(610) SUPPLY PLENUM (OPTIONAL) 22 (559) 4 22 (559)4 (102)4 (102) 4-3/4 (121) 16 (406) 4-3/4 (121) 16 (406) 1 (25)22 (559)1 (25) 4-PIPE 2-PIPE NOTES: 1. Unit measurements on drawings are shown in inches (millimeters). 2. Units are fabricated of galvanized steel with a 16 gage galvanized fan deck. 3. Blower, motor, valves, coil, and filter are accessible through the return air opening. 4. Unit and control box are insulated with 1/2-in. (13 mm) coated fiberglass insulation. 5. Maximum riser size is 2 1/2-in. (64 mm) diameter. If larger sizes are required, please consult the factory. 6. This drawing is pictorial. (See unit arrangements for actual supply and return air orientation.) 7. Riser length = [floor to floor + 2-in. (51 mm)]. Maximum riser length is 119-in. (3023 mm). 8. Unit shipping weight is approximately 390 lb (176 kg). LEGEND CR —Cold Water Return CS —Cold Water Supply D—Drain HR —Hot Water Return HS —Hot Water Supply PSC —Permanent Split Capacitor SWT—Sweat 41 Fig. 37 — Return-Air Wall Panels for Furred-In Units — Panels with No Frame Dimensions PANEL NO. 2 WITHOUT DOOR 61.1 A PANEL NO. 1 FOR 42SU 52.5 A PANEL NO. 1 FOR 42SM 60.5 A PANEL DIMENSIONS (in.) NOTE: Dimensions in inches. PANEL NO. UNIT UNIT SIZE A 1 42SG,SJ, SU 03, 04 15.5 06, 08 19.5 10, 12 23.5 42SM 14,16,20 29.5 2 42SG,SJ 03, 04 15.5 06, 08 19.5 10, 12 23.5 3 42SG,SJ 03, 04 15.2 06, 08 19.2 10, 12 23.2 PANEL NO. 1 55.5 A a42-4167 PANEL NO. 2 61.1 A a42-4169 PANEL NO. 3 55.3 A A42-4173 A42-4272 A42-4274 A42-4275 42 Fig. 38 — Return-Air Wall Panels for Furred-In Units — Panels with Frame Dimensions INSTALLATION Step 1 — Place Units in Position 42C UNITS 1. Select the unit location. Allow adequate space for free aircirculation, service clearances, piping and electricalconnections, and any necessary ductwork. For specificunit dimensions, refer to Fig. 1-12. Allow clearances ac-cording to local and national electric codes. 2. Make sure ceiling is able to support the weight of the unit.See Table 1 for nominal unit weight. 3. Ensure bottom panel has been removed from 42CG, CKunits with mounting holes. When unit is lifted, access tothe 0.375-in. mounting holes is through the bottom of the unit. Hanger rods and fasteners and other required hard-ware must be field-supplied. 4. Move unit into position. Ensure unit is level or pitchedtowards drain to ensure proper drainage and operation.Pitch of suspended unit can change after coil is filled;recheck after filling coil. 5. Mounting unit: a. Use rods and fasteners to suspend the unit at thefactory-provided mounting holes with rubbergrommets on the top of the unit on 42CG, CKunits. Reach into unit and attach unit to the ceilingusing the 0.375-in. mounting holes (4) in toppanel; do not use any other locations. PANEL NO. 5 WITH CONTROL DOOR 60.4 A PANEL NO. 4 54.7 A PANEL NO. 4 FOR 42SU 51.7 A PANEL AND FRAME DIMENSIONS (in.) NOTE: Dimensions in inches. PANEL NO. UNIT UNIT SIZE A 4 42SG,SJ, SU 03, 04 15.1 06, 08 19.1 10, 12 23.1 5 42SG,SJ 03, 04 15.1 06, 08 19.1 10, 12 23.1 A42-4168 A42-4276 A42-4277 PANEL NO. 5 WITHOUT DOOR 60.4 A A42-4273 43 b. Use rods and fasteners to suspend the unit at thefactory-provided 0.375-in. hanger slots (4) withrubber grommets on the top of the unit on the42CA and CE units. NOTE: The four mounting holes and hanger slotswith rubber grommets are NOT for balancing unit. 6. The 42CA units without plenums and 42CE with bottominlet may be installed in noncombustible areas only. NOTE: The installation of horizontal concealed units mustmeet the requirements of the National Fire Protection Associa-tion (NFPA) Standard 90A or 90B concerning the use of con-cealed ceiling space as return-air plenums. 42V UNITS — While the manufacturer is not involved in thedesign and selection of support methods and components, itshall be noted that unacceptable system operating characteris-tics and/or performance may result from improper or inade-quate unit structural support. 1. Select the unit location. Allow adequate space for free aircirculation, service clearances, piping and electricalconnections, and any necessary ductwork. For specificunit dimensions, refer to Fig. 13-23. Allow clearances ac-cording to local and national electric codes. See Fig. 39for minimum clearance recommendations. 2. Make sure the floor is able to support the weight of theunit. See Table 2 for nominal unit weight. Vertical unitsare designed to be floor mounted or otherwise supportedfrom below, and bolted to the wall or floor structurethrough the mounting holes provided in the chassis.These units may be wall hung only when originally or-dered from the factory for wall mount applications. 3. Ensure wall behind unit is smooth and plumb; ifnecessary, install furring strips on walls with irregularsurfaces or mullions. Furring strips must be positionedbehind mounting holes in unit (42VA, VB, VF units). Fasteners, furring strips, and other seals (if required) mustbe field-supplied. 4. Remove all wall and floor moldings from behind the unit. 5. Ensure 42VA top panel (under window application) and42VB, VF front panel has been removed from unit toobtain access to the four 0.75-in. mounting holes. Hangerrods and fasteners and other required hardware must befield-supplied. 6. Move unit into position. Ensure unit is level or pitchedtowards drain to ensure proper drainage and operation.Pitch of suspended unit can change after coil is filled;recheck after filling coil. 7. Adjust 42VA, VB, VC, VE, VF units leveling legs so unitis level. Unit must be level for proper operation andcondensate drainage. 8. Mounting unit: The type of mounting device is a matter of choice, how-ever, the mounting point shall always be that provided inthe chassis or cabinet. a. Use rods and fasteners to suspend the unit at thefactory-provided mounting holes with rubbergrommets on the top of the unit on 42VA, VB, VFunits. Reach into unit and attach unit to the wallusing the 0.375-in. mounting holes (4) in toppanel; do not use any other locations. The fourmounting holes and hanger slots with rubbergrommets are NOT for balancing unit. b. On 42VG unit ensure unit is placed snug withinthe wall. c. On 42VC, VE unit ensure unit is placed flushagainst the wall. NOTE: For any unit without a return-air duct connection,applicable installation codes may limit unit to installation insingle-story residence only. 12" 30" Minimum per building code SIDE VIEW FRONT VIEW ½" Minimum ½" Minimum Level Unit ±¼" Fig. 39 — Clearance Recommendations 44 42D UNITS 1. Select the unit location. Allow adequate space for free aircirculation, service clearances, piping and electrical con-nections, and any necessary ductwork. For specific unitdimensions, refer to the submittal drawings. Allow clear-ances according to the local and national electrical codes. 2. Be sure either the ceiling (42DA, DC, DE, and DF units)or floor (42DD unit) is able to support the weight of theunit. See Table 3 for nominal unit weight. 3. Move unit into position. Ensure unit is level or pitchedtowards drain to ensure proper drainage and operation.See Fig. 24-28. Pitch of suspended unit can change aftercoil is filled; recheck after filling coil. 4. Mounting units to the ceiling: a. When unit is lifted, access to the 0.375-in. mount-ing holes is on the top panel of the unit. Hangerrods and fasteners and other required hardwaremust be field-supplied. b. Use rods and fasteners to suspend the unit at thefactory-provided mounting holes with rubbergrommets on the top of the unit. Attach unit to theceiling using the 0.375-in mounting holes (4) intop panel; do not use any other locations. c. Use the rods and fasteners to suspend the unit atthe factory-provided 0.375-in. hanger slots (4)with the rubber grommets on the top of the unit onthe 42DA, DC, DE, and DF units. NOTE: The four mounting holes and hanger slotswith rubber grommets are NOT for balancing unit. d. Models 42DA and 42DC with bottom inlet may beinstalled in noncombustible return spaces only. 5. Mounting units on the floor: a. Ensure wall behind the unit is smooth and plumb;if necessary, install furring strips on walls withirregular surfaces or mullions. Furring strips mustbe positioned behind mounting holes on 42DDunits. Fasteners, furring strips, and other seals (ifrequired) must be field-supplied. b. If the unit has leveling legs, adjust them correctlyto level the unit. 6. Protect units from damage caused by jobsite debris. Donot allow foreign material to fall in unit drain pan.Prevent dust and debris from being deposited on motor orfan wheels. 42S UNITS — A factory tag is on top of each unit. Tag statesriser tier number, floor, room number if furnished and supply-air arrangement. Check unit for any other labels that apply toinstallation. Units should not be installed at locations otherthan that marked on the unit identification tag. If no specificdetail is shown on tag for unit location then determine configu-ration for the Universal unit based on information within thismanual. Should any questions arise regarding unit configura-tion, contact the sales representative or the factory BEFOREproceeding. Remove unit from pallet and take directly toassigned space for installation. While all equipment isdesigned and fabricated with sturdy materials and may presenta rugged appearance, great care must be taken to assure that noforce or pressure be applied to the coil, risers or piping duringhandling. Never use the riser to lift the unit. To maintain thestraight and square cabinet alignment, avoid lifting or support-ing the cabinet only at the top and bottom. For specific unitdimensions refer to Fig. 29-33. While the manufacturer does not become involved in thedesign and selection of support methods and components, itshould be noted that unacceptable system operating character-istics and/or performance may result from improper or inade-quate unit structural support. Due to variations in building construction, floor plans, and unit configurations, each installa-tion is different. The actual step-by-step method of installationmay vary from unit to unit. However, the risers should bemoved as little as possible to avoid damage to the unit and in-ternal components. 42SG, SH, and SJ Units 1. Begin on lowest floor and progress upward, floor byfloor, to top. 2. Examine drain line (Fig. 34 and 35). Be sure both endsare in place and that it forms a trap. Avoid pinching drainline. 3. Tip unit over riser hole in building floor. As unit isrighted, align riser with unit below. NOTE: The unit must be lowered into the space takingcare to properly align the risers to engage the riser swagedsection on the unit below. The riser should never be bentor pushed together to be passed through the floor slot andshould never be lifted up or pulled down to meet the riseron the floor below or above. 4. Install isolator pads beneath the four corners of unit ifapplicable. 5. Before anchoring the equipment in place, the unit must beleveled and the cabinet must be squared and brought intoline with any adjacent or included walls. The unit may beanchored in place by bolting directly through the unitfloor or attaching to the cabinet in some location that willnot interfere with drywall or other items such as the sup-ply grille, thermostat, or return access panel. When at-taching to the unit cabinet, care must be taken to not pen-etrate the cabinet in locations that may damage internalcomponents or wiring. The mounting technique is a mat-ter of choice; however, the unit should always be an-chored securely to prevent movement during constructionand riser expansion and contraction. On certain units,shipping screws or braces must be removed after the unitis installed. Be sure to check all tags on the unit to deter-mine which, if any, of these devices need to be removed. 6. If installing a 42SJ unit, follow Steps a-h. For 42SG and42SH units, continue to Step 7. NOTE: The 42SJ back-to-back fan coils have been de-signed to serve two separate rooms. These products areclassified by Underwriters Laboratories Inc. for use inpenetration firestop systems, control number 27WL whenordered with 1-hr rated chase. See UL Fire ResistanceDirectory for more information. Figure 40 shows the42SJ unit with standard risers and with Siamese risers. a. Lay out the control lines for the drywall track andstuds in the floor and ceiling (see Fig. 41). NOTE: Tracking may be installed now or after theunit is set. b. Position the 42SJ fan coil assembly between tworooms with the unit drywall separation spottedover the wall control lines. 42SJB 42SJA 42SJB 42SJA Fig. 40 — 42SJ Unit with Standard and Siamese Risers 45 c. If not already installed, install the floor and ceilingtracks up to and over the 42SJ fan coil unit. d. Position the vertical studs and fasten into each ofthe stud pockets formed into the chase side panels(see Fig. 41). NOTE: The studs may be mechanically fastenedto the 42SJ fan coil. Care should be taken, how-ever, not to penetrate the supply or return waterrisers or internal piping. Given the levelness of thefloor and/or the fan coil assembly, some shimmingmay be necessary. e. Assemble the specified wall construction up toand over the top of the fan coil unit (see Fig. 42). f. With the fire-wall separation being complete, thedrywall skin on the surface of the individual fancoils can be applied. Drywall can be applieddirectly to the surface, or, if necessary, studdingmay be installed on the corners for vertical control(see Fig. 42). g. For ease of installation of the access panel, applydrywall on the return air side directly to the sur-face of the unit (see Fig. 42). When applying thewall board directly to the unit cabinet, it may benecessary to shim the wall board in some areas toachieve the desired finished wall surface. h. After all drywalling and painting is complete,install thermostats, supply air grilles and return airpanels. 7. Attach unit risers: NOTE: Submittals and product literature detailing unitoperation, controls, and connections should be thorough-ly reviewed BEFORE beginning the connection and test-ing of risers and piping. The supply and return connec-tions are marked on the coil stub-outs and the valve pack-age with an “S” meaning supply or inlet and “R” meaningreturn or outlet indicating flow direction to and from thecoil. Blue letters mark the chilled water connections andred letters mark the hot water connections. a. Each riser has a 3-in. swaged portion at top andsufficient extension at bottom for an insertedlength of approximately 2-inches. This unit-to-unit joint is NOT intended for full bottoming inthe joint, but allows for variations in floor-to-floordimensions and for correct riser positioning. If job requires that unit risers be supplementedwith between-the-floor extensions, pieces may befield-supplied or factory-supplied. If factory-supplied, insulation is also provided. b. Level unit to ensure proper coil operation andcondensate drainage. Proper riser installation andvertical positioning in the unit provides for a unitpiping run-out to the service valves which are cen-tered in the access slots and level or sloping downslightly away from the riser. This prevents con-densation from running back to the riser and pos-sible damage from dripping at the bottom of ariser column. Each job has specific requirements,and satisfying those requirements is the responsi-bility of the installer. After units are positionedand riser centered in pipe chase, make unit plumbin two directions, using unit frame as a reference. c. Anchor unit to building. Use bolts or lag screwsthrough holes provided in unit frame. d. After all units in a stack are anchored, make unit-to-unit riser joints. First, center each coil-to-riserline within the expansion slot in the unit backpanel. Each riser joint must be in verticalalignment with at least 1-in. penetration into theswaged joint. This condition is met if floor-to-floor dimension is as specified and coil-to-riserlines are properly centered. Wide variations infloor-to-floor dimensions may necessitate cuttingoff or extending individual risers. Such modifica-tions are the full responsibility of the installingcontractor. e. Before making the riser joints, the riser insulationmust be pulled back away from the joint and pro-tected from heat during the brazing process. Theriser joint filler material must be selected to with-stand the total operating pressure (both static andpumping head) to which the system will be sub-jected. Low temperature lead alloy solders such as“50/50” and “60/40” are normally not suitable. INSTALL WALL STUD INTO POCKET FORMED BY CHASE SIDE PANEL CHASE SIDE PANEL DRYWALL TRACK AND STUD CONTROL LINES INSTALL STUDS FROM TOP OF UNIT TO CEILING (4 CORNERS) Fig. 41 — 42SJ Wall Board Installation WALL STUDS INSTALL WALL GYPSUM BOARD (TO WALL AND OVER TOP OF UNIT) INSTALL GYPSUM BOARD TO UNIT SIDES INSTALL GYPSUM BOARD TO FACE OF UNIT WITH CUT OUTS FOR SUPPLY, RETURN AND THERMOSTAT Fig. 42 — 42SJ Unit Installation CAUTION Toxic residues and loose particles resulting from manufac-turing and field piping techniques such as joint compounds,soldering flux, and metal shavings may be present in theunit and the piping system. Special consideration must begiven to system cleanliness when connecting to solar,domestic or potable water systems. Failure to heed thiswarning could result in equipment damage. 46 8. Anchor risers as required: a. Do not fasten risers rigidly within each unit.Risers must be free to move within pipe chasein response to normal vertical expansion andcontraction. The unit internal piping is designed toaccommodate a total riser vertical movement of ± 3/4 in., due to thermal expansion and/or contrac- tion, when positioned properly at the jobsite. b. Built-in risers must be anchored at some pointto building structure. Unit design accommodates up to 11/2-in. expansion and contraction in riser assemblies when positioned properly at the job-site. Risers must be anchored to the building struc-ture to limit expansion and contraction movement to a maximum of 11/2 inches. Riser anchoring and expansion compensation is not included in the fac-tory-supplied unit and must be field provided.While some special riser features are availablefrom the factory, riser end caps, air vents, and/orflushing loops are normally provided on the job bythe installer. 9. Test the system for leaks after the connections are com-pleted. When testing with air or some other gas, it mightbe necessary to tighten stem packing nuts on some valvesto maintain air pressure in the riser. Pressure testing riserswith water should be done with the unit service valvesclosed to prevent flushing debris into the unit valve pack-ages. This will also allow risers to be drained down aftertesting in the winter to avoid freeze-up problems. In theevent that leaking or defective components are discov-ered, the sales representative must be notified before anyrepairs are attempted. All leaks should be repaired beforeproceeding with the installation. 10. After system integrity has been established, pull the riserinsulation back into place over the joint and glue or sealto prevent sweating and heat loss or gain. Internal chilledwater piping and valves are located over the drain panand need not be insulated. 11. If required, fireproof where necessary. Any fireproofingrequirements where risers or piping penetrate floors orwalls are the responsibility of the installer. This workshould be done only after all pressure testing is complet-ed. The fireproofing method used must accommodatepipe expansion and contraction and the piping must beprotected from abrasion and chemical attack. The pipe in-sulation also must be maintained to prevent sweating andmust be protected from wear or erosion at the joint be-tween the insulation and the fireproofing material. 42 SU Units — The unique design of the universal stack fancoil unit allows for field configuration for each unit. Air dis-charge, riser, drain, and outside air knockouts have been strate-gically located on each unit. Risers, shown with unit, are forreference only. All risers are factory fabricated and shippedloose for field installation. It is important that you identify all of the unit feature loca-tions and which knockouts you intend to use before proceedingwith the installation. See Fig. 43-47. Also, it must be deter-mined whether your application requires a Mating Unit (prima-ry/secondary) and its configuration. Consult your local salesrepresentative or the factory for further details on primary/sec-ondary arrangements. Potential 42SU Unit Configurations Risers: Three Locations — The pre-installed supply, return,and drain risers (2-pipe or 4-pipe applications) can be orientedon any of three sides of the unit (see Fig. 43). NOTE: Risers cannot be installed on the return air side of thecabinet. Unit orientation is determined based on the location of therisers in the building. The riser side of the universal stack unitalways determines the rear of the unit. See Fig. 44. Return Air: Single Location — The return air/access panelmay then be oriented on the left, right, or front of the unit. Supply Air: Five Locations (4 sides and top) includes stitcheddesign for 1/2-in. duct flanges. Outside Air: Two Locations — Either side adjacent to thereturn air opening. NOTE: Outside air opening may be used on a side if risers areconfigured on that same side. Supply, Return, and Drain Riser Installation 1. Three sides of each universal stack unit have four supplyand return riser knockouts along the center and one drainknockout near the lower part of the unit (see Fig. 45).Identify whether your application uses a 2-pipe or 4-pipeconfiguration. a. Two-pipe configurations typically use the twoinner riser knockouts. b. Four-pipe configurations will use all four riserknockouts. IMPORTANT: Chilled water and hot water risers shouldnever be piped to drain down into the condensate riser.Extensive water damage can occur due to drain over-flow. Drain chilled and hot water risers to a remote loca-tion away from the unit such as sink, room or floordrains. 42SU CABINET RETURN AIR HRCRDHSCSHRCRDHSCSHR CRDHS CS D CRHS CSHRRDS HR = HOT WATER RETURN HS = HOT WATER SUPPLY D = DRAIN CR = COLD WATER RETURN CS = COLD WATER SUPPLY R = RETURN D = DRAIN S = SUPPLY 2- or 4-PIPE Fig. 43 — 42SU Unit Configuration a42-4283 REAR (RISER SIDE) 42SU CABINET RIGHT FRONT LEFT Fig. 44 — 42SU Unit Orientation a42-4284 47 2. Locate and mark the riser and drain knockouts that applyto your particular unit application, ensuring proper orien-tation of the return air opening in room. 3. Insert a flat head screw driver into knockout slot shown inFig. 46. 4. Pry screw driver back and forth until knockout tabs breakaway from the unit. 5. Discard knockout. Be careful of sharp edges. 6. Use a sharp retractable knife (see Fig. 47) and verticallycut the insulation down the center of the riser and drainknockouts the full length of the knockout. 7. Use adhesive or glue to re-attach insulation that haspulled away from the unit during knockout removalprocess. Double Riser Swag Installation 1. The riser carton should contain: a. 2-pipe application: 1 supply riser with threaded ball valve stub-out 1 return riser with threaded ball valve stub-out 1 drain riser with copper stub-out b. 4-pipe application: 2 supply riser with threaded ball valve stub-out 2 return riser with threaded ball valve stub-out 1 drain riser with copper stub-out 2. Measure the building’s floor-to-floor height and refer toTable 5 for correct field supplied riser extension lengthrequired. Table 5 — Recommended Extension Length 3. Before cutting riser extensions, make sure the piece ofriser you are going to cut to make the extension matchesthe riser diameter that was ordered with unit. All transi-tion pieces like riser reducers are field supplied andfield installed. 4. Cut riser extensions using the recommended length fromTable 5. 5. Identify and orient each unit riser so the installer knowswhich end is the top and which is the bottom. Use Fig. 48and Table 6 for reference. SIDE SUPPLY AIR KNOCKOUT (1 PER SIDE) RISER KNOCKOUTS (4 PER SIDE, EXCEPT ON RETURN AIR SIDE) DRAIN KNOCKOUT (1 PER SIDE, EXCEPT ON RETURN AIR SIDE) OUTSIDE AIR KNOCKOUT (2 SIDES ONLY, ADJACENT TO RETURN AIR OPENING) SIDE VIEW RETURN AIR OPTIONAL ELECTRICAL KNOCKOUTS a42-4285 TOP SUPPLY AIR KNOCKOUT TOP VIEW ELECTRICAL KNOCKOUTS a42-4286 Fig. 45 — Locate 42SU Unit Knockouts FLOOR-TO-FLOOR DIMENSION (in.) EXTENSION LENGTH REQUIRED (in.) 102 26 104 28 106 30 KNOCKOUT SLOT KNOCKOUT TAB KNOCKOUT KNOCKOUT TAB DRAIN KNOCKOUT SUPPLY AND RETURN a42-4309 Fig. 46 — Remove 42SU Unit Knockouts DRAIN INSULATION CUT LINESUPPLY AND RETURN INSULATION CUT LINE a424287 Fig. 47 — 42SU Unit Knockout Insulation Removal 48 Table 6 — Unit Riser Orientation 6. Insert cut riser extensions into the bottom swages of therisers to a penetration depth of 2-inches. 7. Invert the riser with extension to allow for an easier braze.Make the braze joint according to local building codespecifications. 8. Identify and orient the brazed risers so that they willmatch the riser locations for the installed unit. Use Fig. 49for reference. 9. Insert brazed extension/riser into the building’s floorblock-out hole in the order specified in Fig. 48. Insert ex-tension into swage of unit below, approximately 2-inches. 10. Verify the floor to riser stub-out and/or ball valve assem-bly dimension. For a return and supply riser, this dimen-sion should be 39-inches. For a drain riser, this dimensionshould be 5-inches. (See Table 6.) 11. Verify riser stub-out is correctly aligned so that stub-outwill penetrate through the riser knockout slot of the unit. 12. Secure the riser positions for final braze. 13. Make sure braze joint between riser and cut extension ac-cording to local building code specifications. 14. Repeat steps 2 through 13 for each floor as you move upthe riser column. 15. Once all risers have been installed, the installer must per-form a leak test for each riser column. 16. Once the riser column has passed its leak test inspection,each riser extension should be properly insulated. No ex-posed copper should be allowed for the riser columns. 17. Install the unit drain P-trap per unit instructions. 18. Prepare the unit for assembly per unit instructions. 19. Attach and install hose kits and P-trap to the unit per unitinstructions. Submittals and product literature detailing unit operation,controls, and connections should be thoroughly reviewed BE-FORE beginning the connection and testing of risers andpiping. To assure optimal unit performance, the supply connec-tion(s) are marked on the unit’s coil with an “S” meaning sup-ply or inlet and “R” meaning return or outlet indicating flow di-rection to and from the coil. Blue letters mark the chilled waterconnections and red letters mark the hot water connections. The unit’s internal piping is designed to accommodate a to-tal riser vertical movement of ±1½ in., due to thermal expan-sion and/or contraction, when positioned properly at the job-site. Risers must be anchored to the building structure to limitexpansion and contraction movement to a maximum of 3 inch-es. Riser anchoring and expansion compensation is not includ-ed in the unit and must be provided. Riser end caps, air vents,and/or flushing loops must be provided at the jobsite by theinstaller. Proper field riser installation and vertical positioning in theunit should have a pipe run-out to the service valves which arecentered in the knockout access slots and that slope downslightly away from the riser (see Fig. 48). This prevents con-densation from running back to the riser and possible damagefrom dripping at the bottom of a riser column. Each job hasspecific requirements and satisfying those requirements is theresponsibility of the installer. Riser to Unit Installation — Before making the riser joints,the riser insulation must be pulled back away from the joint andprotected from heat during the brazing process. Each riser jointmust be in vertical alignment. Variations in floor-to-floor di-mensions may require field work such as cutting off or extend-ing the risers. This operation is the responsibility of the install-er. The riser joint filler material must be selected to withstandthe total operating pressure (both static and pumping head) to RISER TYPE TOP SWAGE TO RISER STUB-OUT (in.) BOTTOM SWAGE TO RISER STUB-OUT (in.) STUB-OUT HIGHT - AFF (Above Finished Floor) Supply and Return Riser 26.75 53 39 Drain Riser 60.75 19 5 19 60.75 53 26.75 SUPPLY/ RETURN TOP DRAIN TOP Fig. 48 — Riser Extension 42SU CABINET RETURN AIR R D S DHR HS CR CS R = Return D = Drain S = Supply HR = Hot Water Return HS = Hot Water Supply S = Supply CR = Cold Water Return CS = Cold Water Supply Fig. 49 — Brazed Riser Orientation CAUTION Toxic residues and loose particles resulting from manufac-turing and field piping techniques such as joint compounds,soldering flux, and metal shavings may be present in theunit and the piping system. Special consideration must begiven to system cleanliness when connecting to solar,domestic or potable water systems. 49 which the system will be subjected. Low temperature lead al-loy solders such as “50/50” and “60/40” are normally not suit-able. Riser to Drain Installation 1. After the applicable supply, return, and drain knockoutshave been removed, carefully position the unit so that theriser ball valves penetrate into the unit through the riserknockouts making sure the insulation penetrates into theunit as shown in Fig. 50-53. 2. Before anchoring the equipment in place, the unit must beleveled and the cabinet must be plumb and squared. Theunit may be anchored in place by bolting directly throughthe unit floor or attaching to the cabinet in some locationthat will not interfere with drywall or other items such asthe supply grille, thermostat, or return access panel.When attaching to the unit cabinet, care must be taken tonot penetrate the cabinet in locations that may damage in-ternal components or wiring. The mounting technique is amatter of choice; however, the unit should always be an-chored securely to prevent movement during constructionand riser expansion and contraction. After anchoring theunit, it is then ready for the various service connectionssuch as riser connections and electrical. 3. The plastic flare caps on the end of the riser ball valvesshould be removed and discarded. 4. All universal stack units use reinforced braided stainlesssteel flexible hose kits for piping between field-installedrisers and unit water coils as shown in Fig. 51. The hosekit design has threaded connections on each end. Thehose kits allow for riser fluctuations due to thermalexpansion. 5. Use a wrench to tighten the swivel connections. Use abackup wrench to hold the riser ball valve stationary toprevent it from bending or twisting during installation asshown in Fig. 52. Be careful to not over tighten swivelconnections. 6. Locate the unit’s coil fitting. 7. The plastic flare caps on the end of the coil fitting shouldbe removed and discarded. 8. Use a wrench to tighten the swivel connections. The baf-fle acts as a secondary wrench. Be careful to not overtighten swivel connections. 9. Locate the p-trap drain and rubber hose factory installedto the drain pan connection in the bottom of the unit asshown in Fig. 53. 10. Push the rubber drain hose over the riser drain stubout. Becareful not to bend the drain stubout. 11. Adjust the hose clamp over the riser stubout and rubberhose to hold in place as shown in Fig. 53. 12. Test for leaks. Any and all leaks should be repaired beforeproceeding with installation. When testing with air orsome other gas, it might be necessary to tighten stempacking nuts on some valves to maintain air pressure inthe riser. Pressure testing risers with water should be donewith the unit service valves closed to prevent flushing FLARE CAP BALL VALVE RISER STUBOUT INSULATION THREADED FLARE FITTING UNIT INSULATIONOUTER CABINET RISER KNOCKOUT SLOT a42 4288 Fig. 50 — 42SU Unit Riser to Unit Installation Setup FLEXIBLE HOSE KIT RISER BALLVALVE RISER STUBOUT INSULATION CONNECTION POINT TO ANY FACTORY FURNISHED AND INSTALLED COMPONENTS. COIL BAFFLE Fig. 51 — 42SU Unit Riser to Unit Installation a42-4289 CAUTION Hose connection torque requirements are 350 in. lb +10/–0 in. lb to prevent leaks. CAUTION Hose connection torque requirements are 350 in. lb +10/–0 in. lb to prevent leaks. BACK-UP WRENCH BALL VALVE WRENCH SWIVEL CONNECTION Fig. 52 — 42SU Unit Riser to Unit Installation (Tighten Swivel Connections) a42-4290 DRAIN PAN DRAIN CLAMP CLAMP RISER KNOCKOUT UNIT INSULATION P-TRAP UNIT WALL RISER RISER STUBOUT a42-4291 Fig. 53 — 42SU Unit Riser to Drain Installation 50 debris into the unit valve packages. This will also allowrisers to be drained down after testing in the winter toavoid freeze-up problems. In the event that leaking or de-fective components are discovered, the sales representa-tive must be notified BEFORE any repairs are attempted.All leaks should be repaired before proceeding with theunit installation. 13. After system integrity has been established, the riser insu-lation must be pulled back into place over the joint andglued or sealed to prevent sweating and heat loss or gain.All of the risers including the riser stubouts should beproperly covered with insulation. Internally mountedchilled water piping and valves are located over the drainpan and need not be insulated. Any fireproofing requirements where risers or piping pene-trate floors or walls are the responsibility of the installer. Thiswork should be done only after all pressure testing is complet-ed. The fireproofing method used must accommodate pipe ex-pansion and contraction and the piping must be protected fromabrasion and chemical attack. The pipe insulation also must bemaintained to prevent sweating and must be protected fromwear or erosion at the joint between the insulation and the fire-proofing material. When no risers are ordered for the universal stack unit, it isthe responsibility of the installer to make sure that an isolationball valve is installed between each supply and return pipingconnection to the unit. Flare fittings are factory provided to al-low connection between the ball valves and the hoses. Supply Air Installation — Each side of the unit has one sup-ply air knockout as well as a supply air knockout on the top ofthe unit (see Fig. 45). 1. Determine which supply air opening/openings are re-quired for your application. NOTE: The supply air opening on the riser side of theunit should not be used. 2. Use a sharp retractable knife to trim insulation using cen-ter knockout slot/trim line as pattern (see Fig. 54). 3. Use a sharp standard needle nose pliers and grab knock-out tab (see Fig. 54). 4. Twist or pry pliers back and forth until knockout tabbreaks away from unit. 5. Repeat for all supply air tabs until all have been broken. 6. Discard center knockout piece. Be careful of sharp edges. 7. Use a sharp retractable knife to trim any excess insulationusing knockout hole as pattern. 8. Use duct pliers (hand seamers) to fold duct flange out ofthe unit 90 degrees for each side of the supply air openingalong duct break (see Fig. 54). The 90-degree flanges cannow be used as drywall stops to prevent coverage of dis-charge opening (see Fig. 55). 9. Use adhesive or glue to re-attach insulation that haspulled away from the unit during knockout removalprocess. 10. For ducted applications tape should be applied along andaround all of the supply air opening knockouts to preventair leakage. All installations should be made in compliance with all gov-erning codes and ordinances. Compliance with all codes is theresponsibility of the installing contractor. 42 SM Units — The unique design of the mega stack fan coilunit allows for field configuration of each unit. Risers, shownwith unit, are for reference only. All risers are factory fabricat-ed and shipped loose for field installation. It is important that you identify all of the unit feature loca-tions before proceeding with the installation, see Fig. 36. Also,it must be determined whether your application requires a mat-ing unit (primary/secondary) and its configurations. Consultyour local sales representative or the factory for further detailson primary/secondary arrangements. Unit orientation is determined based on the location of therisers in the building. Risers can only be installed on the rearside of the unit and always determine the rear of the mega stackunit. The return air is always on the front (see Fig. 56). Supply, Return, and Drain Risers KNOCKOUT TAB (10 PLACES) DUCT BREAK (4 PLACES) KNOCKOUT TAB TRIM LINE a42-4291 Fig. 54 — 42SU Unit Supply Air Installation CAUTION Toxic residues and loose particles resulting from manufac-turing and field piping techniques such as joint compounds,soldering flux, and metal shavings may be present in theunit and the piping system. Special consideration must begiven to system cleanliness when connecting to solar,domestic or potable water systems. UNIT WALL UNIT INSULATION 90° DUCT FLANGE Fig. 55 — 42SU Supply Air Installation a42-4293 RETURN AIR 42SM CABINET HR CRDHS CS HR = HOT WATER RETURN HS = HOT WATER SUPPLY D = DRAIN CR = COLD WATER RETURN CS = COLD WATER SUPPLY D CRHS CSHR R = RETURN D = DRAIN S = SUPPLY R D S 2- or 4-PIPE RIGHTLEFT REAR FRONT Fig. 56 — 42SM Unit Installation a42-4294 51 Submittals and product literature detailing unit operation,controls, and connections should be thoroughly reviewed BE-FORE beginning the connection and testing of risers andpiping. The supply and return connections are marked on the coilstubouts and the valve package depending on your configura-tion. “CS” means cold water supply, “CR” means cold waterreturn, “HS” means hot water supply, and “HR” means hot wa-ter return to indicate flow direction to and from the coil. Blueletters mark the chilled water connections and red letters markthe hot water connections. The unit internal piping is designed to accommodate a totalriser vertical movement of ±11/2 in., due to thermal expansionand/or contraction, when positioned properly at the jobsite.Risers must be anchored to the building structure to limit riserexpansion and contraction movement to a maximum of 3 inch-es. Riser anchoring and expansion compensation is not includ-ed in the factory-supplied unit and must be field provided.While some special riser features are available from the factory,riser end caps, air vents, and/or flushing loops are normallyprovided on the job by the installer. Riser to Unit Installation — Proper riser installation and verti-cal positioning in the unit provides for a unit piping run-out tothe service valves which are centered in the access slots andlevel or sloping down slightly away from the riser. This pre-vents condensation from running back to the riser and possibledamage from dripping at the bottom of a riser column. Eachjob has specific requirements and satisfying those requirementsis the responsibility of the installer. Riser to Drain Installation 1. Carefully position the unit so that the riser ball valvespenetrate into the unit through the riser slot making surethe insulation penetrates into the unit as shown in Fig. 57and 58. 2. Before anchoring the equipment in place, the unit must beleveled and the cabinet must be plumb and squared. Theunit may be anchored in place by bolting directly throughthe unit’s floor or attaching to the building walls throughthe cabinet walls in some location that will not interferewith drywall or other items such as the supply grille, ther-mostat, or return access panel. When attaching sheetrockto the unit cabinet, care must be taken to not penetrate thecabinet in locations that may damage internal compo-nents or wiring. The mounting technique is a matter ofchoice; however, the unit should always be anchored se-curely to the building to prevent movement during con-struction and riser expansion and contraction. After an-choring the unit, it is then ready for the various serviceconnections such as riser connections and electrical. 3. The plastic flare caps on the end of the riser ball valvesshould be removed and discarded. 4. All mega stack units use reinforced braided stainless steelflexible hose kits for piping between field installed risersand unit water coils as shown in Fig. 58. Each hose hasthreaded connections on each end. The hose kits allow forriser fluctuations due to thermal expansion. 5. Use a wrench to tighten the swivel connections. Use abackup wrench to hold the riser ball valve stationary toprevent it from bending or twisting during installation asshown in Fig. 59. Be careful to not over tighten swivelconnections. 6. Locate the unit’s coil fitting. 7. The plastic flare caps on the end of the coil fitting shouldbe removed and discarded. 8. Use a wrench to tighten the swivel connections. The baf- fle acts as a secondary wrench. Be careful to not overtighten swivel connections. 9. Locate the p-trap drain and rubber hose factory installed to the drain pan connection in the bottom of the unit asshown in Fig. 60. 10. Push the rubber drain hose over the riser drain stubout. Be careful that you do not bend the drain stubout. 11. Adjust the hose clamp over the riser stubout and rubberhose to hold in place as shown in Fig. 60. BALL VALVE RISER STUBOUT INSULATION THREADED FLARE FITTING FLARE CAP UNIT INSULATIONOUTER CABINET RISER KNOCKOUT SLOT Fig. 57 — 42SM Riser to Unit Installation a42-4295 FLEXIBLE HOSE KIT RISER BALL VALVE RISER STUBOUT INSULATION CONNECTION POINT TO ANY FACTORY FURNISHED AND INSTALLED COMPONENTS. COIL BAFFLE Fig. 58 — 42SM Riser to Unit Connection a42-4296 CAUTION Hose connection torque requirements are 350 in. lb +10/–0 in. lb to prevent leaks. CAUTION Hose connection torque requirements are 350 in. lb +10/–0 in. lb to prevent leaks. BACK-UP WRENCH BALL VALVE WRENCH SWIVEL CONNECTION a42-4297 Fig. 59 — 42SM Riser to Unit Installation (Tighten Swivel Connections) 52 12. Test for leaks. Any and all leaks should be repaired beforeproceeding with installation. When testing with air orsome other gas, it might be necessary to tighten stempacking nuts on some valves to maintain air pressure inthe riser. Pressure testing risers with water should be donewith the unit service valves closed to prevent flushing de-bris into the unit valve packages. These valves will alsoallow risers to be drained down after testing in the winterto avoid freeze-up problems. In the event that leaking ordefective components are discovered, the sales represen-tative must be notified BEFORE any repairs are attempt-ed. All leaks should be repaired before proceeding withthe unit installation. 13. After system integrity has been established, the riser insu-lation must be pulled back into place over the joint andglued or sealed to prevent sweating and heat loss or gain.All of the risers including the riser stubouts should beproperly covered with insulation. Internally mountedchilled water piping and valves are located over the drainpan and need not be insulated. Any fireproofing requirements where risers or pipingpenetrate floors or walls are the responsibility of the in-staller. This work should be done only after all pressuretesting is completed. The fireproofing method used mustaccommodate pipe expansion and contraction and thepiping must be protected from abrasion and chemical at-tack. The pipe insulation also must be maintained to pre-vent sweating and must be protected from wear or ero-sion at the joint between the insulation and the fireproof-ing material. When no risers are ordered for the mega stack unit, it isthe responsibility of the installer to make sure that a field-supplied isolation ball valve is installed between eachsupply and return piping connection to the unit. Flarefittings are factory provided to allow connection betweenthe ball valves and the hoses. Variations in floor-to-floor dimensions may require fieldwork such as cutting off or extending the risers. This op-eration is the responsibility of the installer. The riser jointfiller material must be selected to withstand the total op-erating pressure (both static and pumping head) to whichthe system will be subjected. Low temperature lead alloysolders such as “50/50” and “60/40” are normally notsuitable. Chilled water and hot water risers should never be pipedto drain down into the condensate riser. Extensive waterdamage can occur due to drain overflow. Drain chilledand hot water risers to a remote location away from theunit such as sink, room, or floor drains. All installations should be made in compliance with allgoverning codes and ordinances. Compliance with allcodes is the responsibility of the installing contractor. Supply Air Installation 1. If the unit has been ordered with a supply air plenum,then each side of the unit has one supply air knockout aswell as a supply air knockout on the top of the unit (seeFig. 61 and 62). 2. Determine which supply air opening/openings are re-quired for your application. NOTE: The supply air opening on the riser side of theunit should not be used. 3. Use a sharp retractable knife to trim insulation using cen-ter knockout slot/trim line as pattern (see Fig. 63). 4. Use a sharp standard needle nose pliers and grab knock-out tab (see Fig. 63). 5. Twist or pry pliers back and forth until knockout tabbreaks away from unit. 6. Repeat for all supply air tabs until all have been broken. 7. Discard center knockout piece. Be careful of sharp edges. 8. Use a sharp retractable knife to trim any excess insulationusing knockout hole as pattern. 9. Use duct pliers (hand seamers) to fold duct flange out ofthe unit 90 degrees for each side of the supply air openingalong duct break (see Fig. 63). The 90-degree flanges cannow be used as drywall stops to prevent coverage of dis-charge opening (see Fig. 64). DRAIN PAN DRAIN CLAMP CLAMP RISER KNOCKOUT UNIT INSULATION P-TRAP UNIT WALL RISER RISER STUBOUT a42-4298 Fig. 60 — 42SM Riser to Drain Installation SIDE SUPPLY AIR KNOCKOUT (1 PER SIDE) SIDE VIEW MEGA MOD CABINET OPTIONAL SUPPLY PLENUM a42-4299 Fig. 61 — 42SM Unit Knockout Locations Side View (Typical) TOP SUPPLY AIR KNOCKOUT TOP VIEW ELECTRICAL KNOCKOUTS Fig. 62 — 42SM Unit Knockout Locations Top View (Typical) a42-4300 53 10. Use adhesive or glue to re-attach insulation that haspulled away from the unit during knockout removalprocess. 11. For ducted applications tape should be applied along andaround all of the supply air opening knockouts to preventair leakage. Step 2 — Make Piping Connections — Access topiping is available through the access panels at the side of theunits or front of the unit. Qualified personnel in accordance with local and national codes must perform all piping connec-tions. Refer to Tables 1-4 for piping connections. NOTE: It is important to have a common understanding ofwhich side of the unit is the right hand side and which is theleft hand side. When facing the supply air outlet from the front of the unit(air blowing in your face), your right hand will be on the rightside of the unit and your left hand will be on the left side of theunit. See Fig. 65. Refer to Fig. 66 and 67 for typical pipingconnections. The supply and return piping connections of the factory-provided valve package are either swaged for field brazing(standard) or union fitted (optional) for field connection to thecoil. VALVE PACKAGES — There are limitations on physicalsize of pneumatic valves, quantity and type of matchingcomponents, and required control interface. See Fig. 68. Consult factory before ordering any special valve packagecomponents that are not covered in this book. Valve packages are shipped with the units or in unit cartons.Valve packages include belled ends for field soldering to coilconnections. All factory-furnished cooling valve packages are arrangedto position as much of the package as possible over an auxiliarydrain pan or drip lip. This helps minimize field piping insula-tion requirements. Refer to Fig. 69-72 for pipe connectionconfigurations. See Table 7 for descriptions of common pipingcomponents. KNOCKOUT TAB (10 PLACES) DUCT BREAK (4 PLACES) KNOCKOUT TAB TRIM LINE a42-4301 Fig. 63 — 42SM Unit Supply Air Installation UNIT WALL UNIT INSULATION 90º DUCT FLANGE Fig. 64 — 42SM Unit Supply Air Installation a42-4302 Fig. 65 — Unit End Reference 54 NOTE: Chilled water piping determines the hand of the unit. Fig. 66 — Pipe Connection Configurations NOTE: Chilled water piping determines the hand of the unit. SAME END CONNECTION OPPOSITE END CONNECTION Valve Packages For 2-Pipe Systems — Valve packages for standard 2-pipe units are piped for same end connection (L.H. or R.H.). Valve Packages for 4-Pipe Systems — Select 2 valve packages per unit. NOTE: Hot water valve package requirements may not be the same as chilled water valve package! LEGEND CW —Chilled Water HW —Hot Water LH —Left Hand RH —Right Hand SAME END CONNECTIONOPPOSITE END CONNECTION 55 Fig. 67 — Piping Connection Positions FIELD PIPING CONNECTIONS* WALL UNITS, FURRED-IN Pipe to stub connections at the side of unit. or into optional piping compartment. Optional piping compart- ment is required if valves are factory installed. Factory-installed valve package is limited to one 2-way or 3-way motorized valve and 2 hand valves. *Location of field piping connections will vary depending on number of coil rows on factory-supplied coil or arrangement of factory-supplied valves. 42VG 42VG a42-4177 HYDRONIC COIL ARRANGEMENT VERTICAL FLOOR UNITS — 42VB, VE, VF Pipe into cabinet end compartment (opening in bottom and back). VERTICAL FLOOR UNITS — 42VA, VC Pipe to external connections (no cabinet). CEILING UNITS (EXPOSED) — 42CG, CK, DE, DF Pipe through knock-outs in rear of cabinet to coil and valve package connections. CEILING UNITS (CONCEALED) — 42CA, CE, CF, DA, DC Pipe to connections extending from end of unit. VERTICAL UNITS — 42DD Pipe to stub connections extending from side of unit. 56 Fig. 68 — Symbols and Placement of Valves a42-213tf Coil Connections (Positions A & B) — When isolation valve only is added to supply or return line, the isolation valve will be factory brazed to the coil stub-out. Addition of any other component or connection to the supply or return line will change the respective coil connection(s). Service Fittings (Positions C & D) — Optional fittings for attaching pressure/temperature sensing devices to obtain pressure drop or tem- perature differential across coil. Used with ball valve or balance valve where extremely accurate water flow balancing is required. Water Flow Balancing (Positions E, F, & H) — Only one device per total valve package to be used for balancing water flow through the coil. When isolation valve (ball valve or ball valve with memory stop at position H) is used for water flow balancing, do not specify additional balancing device at position E or F. When balancing device is specified at position E or F, isolation valve does not require balancing feature at position H (with a 3-way motorized valve, a bypass balancing valve may be specified in the bypass line to permit equal flow balancing). Strainer (Position G) — Does not include blow down fitting and should not be used in lieu of main piping strainers. Isolation Valves (Positions H & J) — Normally requires one each on supply and return line (see exception under water flow balancing above). When position H is used for balancing (ball valve or ball valve with memory stop), check specifications for service valve require- ments. a42-4222 57 BALL VALVE BALL VALVE (2) BALL (1) 2-WAY MOTORIZED R S COIL BALL VALVE (WITH MEMORY STOP) BALL VALVE (2) BALL (ONE WITH MEMORY STOP) (1) 2-WAY MOTORIZED R S COIL MOTORIZED 2-WAY VALVE M MOTORIZED 2-WAY VALVE M M Fig. 69 — Two-Way Motorized Control Valve Package The 2-way motorized valve motor drives valve open and a spring returns valve to normally closed position (no water flow with unit OFF). Supply connection at coil will be swage fit for field braze (standard) or union (option). Return connection at coil will be factory brazed if isolation valve only. Addition of any other component will require swage fit for field braze or optional union connection. Check job specifications for system pressure, pressure drop imitations and flow rate prior to selecting valve package components or valve package size (1/2in., 3/4 in., etc.). 2-PIPE SYSTEM (One Valve Package) or 4-PIPE SYSTEM (Two Valve Packages) Application: • 2 Pipe — Hydronic Heating Only • 2 Pipe — Hydronic Cooling Only • 2 Pipe — Hydronic Cooling with Total Electric Heat • 4 Pipe — Hydronic Cooling and Heating LEGEND NOTE: A 1/4-in. bypass line is included in the piping package when a 2-way valve is specified with a control package contain- ing an automatic changeover device. Ball Valve Motorized 2-Way ValveM M MOTORIZEDMOTORIZED a42-4174 a42-4308 BALL VALVE GATE SHUT OFF (1) GATE (1) BALL (1) 2-WAY MOTORIZED R S COIL BALL VALVE BALL VALVE (2) BALL (1) BALANCING (1) 2-WAY MOTORIZED R S COIL CIRCUIT SETTER BALL VALVE (1) BALL (1) CIRCUIT SETTER (1) 2-WAY MOTORIZED R S COIL MOTORIZED 2-WAY VALVE A BYPASS BALANCINGVALVE A MOTORIZED 2-WAY VALVE BYPASS A MOTORIZED 2-WAY VALVE BYPASS M M M Fig. 70 — Two-Way Motorized Control Valve Package with Aquastat Bleed Bypass Line The 2-way motorized valve motor drives valve open and a spring returns valve to normally closed position (no water flow through coil with unit OFF). The aquastat bleed bypass bleeds a small amount of water from supply to return when control valve is closed (required for system water temperature sensing by aquastat). Aquastat (A) clips on supply line upstream from aquastat bleed bypass (as shown at right). It senses system water temperature to prevent cooling operation with hot water in system piping or heating operation with chilled water in system piping. Additional aquastat is required to lock out the optional auxiliary electric heat when hot water is in the system. Supply and return connections at coil will be swage fit for field braze (standard) or unions (option). Check job specifications for system pressure, pressure drop limitations and flow rate prior to selecting valve package components or valve package size (1/2in., 3/4 in., etc.). 2-PIPE SYSTEM (One Valve Package) Application: • 2 Pipe — Hydronic Cooling and Heating • 2 Pipe — Hydronic Cooling and Heating with Auxiliary Electric Heat LEGEND NOTE: Additional aquastat required as noted above. Balancing Valve Ball Valve Circuit Setter Gate Shut Off Valve Motorized 2-Way ValveM MOTORIZEDMOTORIZED M a42-4175 58 CIRCUIT SETTER (1) BALL(1) CIRCUIT SETTER(1) 3-WAY MOTORIZED COIL BALL VALVE GATESHUT OFF VALVE (1) GATE (1) BALL (1) 3-WAY MOTORIZED R SCOIL BALL VALVE BALL VALVE (2) BALL (1) BALANCING (1) 3-WAY MOTORIZED R SCOIL MOTORIZED 3-WAY VALVE BYPASS BALANCING VALVE MOTORIZED 3-WAY VALVE BYPASS (1) BALL (1) 3-WAY MOTORIZED R SCOIL BALANCING VALVE BALL VALVE BALL VALVE (WITH MEMORY STOP) MOTORIZED 3-WAY VALVE BYPASS (2) BALL (ONE WITH MEMORY STOP) (1) 3-WAY MOTORIZED R SCOIL BALL VALVE BALL VALVE MOTORIZED 3-WAY VALVE BYPASS R SCOIL BALL VALVE MOTORIZED 3-WAY VALVE BYPASS M M M M M M Fig. 71 — Three-Way Motorized Control Valve Package On the 3-way motorized valve flow is normally closed to coil and open to system return. Motor closes bypass flow to sys- tem return while opening flow through coil. Water bypasses coil and flows directly to system return when unit is OFF. The aquastat (A) clips on supply line upstream from 3-way valve (as shown above). It senses system water tempera- ture to prevent cooling operation with hot water in system piping or heating operation with chilled water in system pip- ing. Aquastat(s) required for 2-pipe cooling and heating with automatic changeover control and/or auxiliary electric heat. A bypass balancing valve may be specified in the bypass line to permit equal flow balancing. Supply and return connections at coil will be swage fit for field braze (standard) or unions (option). Check job specifications for system pressure, pressure drop limitations and flow rate prior to selecting valve package components or valve package size (1/2in., 3/4 in., etc.). 2-PIPE SYSTEM (One Valve Package) or 4-PIPE SYSTEM (Two Valve Packages) Application: • 2 Pipe — Hydronic Heating Only • 2 Pipe — Hydronic Cooling Only • 2 Pipe — Hydronic Cooling with Total Electric Heat • 2 Pipe — Hydronic Cooling and Heating • 2 Pipe — Hydronic Cooling and Heating with Auxiliary Electric Heat • 4 Pipe — Hydronic Cooling and Heating LEGEND *When aquastat is used for automatic changeover, bypass is required as indicated by dashed line. NOTES: 1. Packages factory furnished and installed. 2. Valves are 5/8-in. ODS unless otherwise specified. 3. If an automatic flow control valve is added, it will be located on supply line between shutoff valve and coil (or motorized control valve, if supplied). Balancing Valve Ball Valve Ball Valve with Memory Stop Circuit Setter Gate Shut Off Valve Motorized 3-Way Valve M M MOTORIZEDMOTORIZED M a42-4176 59 42C,D,V DRAIN CONNECTIONS — Install drain line inaccordance with all applicable codes. A continuous pitch of1 in. per 10 ft of condensate drain line run is necessary foradequate condensate drainage. Insulate the drain line toprevent sweating. Extend the drain line straight from the drainpan before making any turns. The installer must provide propersupport for the drain line to prevent undue stress on theauxiliary drain pan. A drain trap may be required by local codes and is recom-mended for odor control. The differential height inlet to outletmust be at least 1-in. wg greater than the total static pressure ofthe unit. The differential height of the outlet to the bottom ofthe trap must not be less than the total static pressure of theunit. See Fig. 73 (42D) and 74 (42V). Provide a trap of at least 2 in. near the end of the drain lineto prevent odors from entering the rooms. WITH HAND VALVES ONLY BALL VALVE BALL VALVE (2) BALL R S COIL BALL VALVE GATE SHUT OFF VALVE (1) BALL (1) GATE R S COIL BALL VALVE BALL VALVE (2) BALL (1) BALANCING R S COIL BALL VALVE (1) BALL (1) CIRCUIT SETTER R S COIL BALANCING VALVE CIRCUIT SETTER Fig. 72 — Valve Package without Motorized Control When isolation valves only are specified, they will be brazed to the coil stub-outs. Check job specifications for system pressure, pressure drop limitations and flow rate prior to selecting specific compo- nents or valve package size (1/2 in., 3/4 in., etc.). 2-PIPE SYSTEM ONLY (One Valve Package) Application: • 2 Pipe - Hydronic Heating Only • 2 Pipe - Hydronic Cooling Only LEGEND *When aquastat is used for automatic changeover, bypass is required as indicated by dashed line. NOTES: 1. Continuous water flow, chilled water or hot water. 2. Not recommended for high humidity applications. 3. 2-Pipe System Only: Not recommended with unit- mounted thermostat on vertical units. 4. The addition of any other component(s) wil require swage fitting for field braze or optional union connection. 5. Packages factory furnished and installed. 6. Valves are 5/8-in. ODS unless otherwise specified. 7. If an automatic flow control valve is added, it will be located on supply line between shutoff valve and coil (or motorized control valve, if supplied). Balancing Valve Ball Valve Circuit Setter Gate Shut Off Valve a42-4307 CONDENSATE PAN STUB-OUT 7/8 IN. FIELD-SUPPLIED DRAIN EXTENSION TRAP 2 IN. MIN Fig. 73 — Typical Drain Line Details (42D Unit Shown) 60 42C,D,V WATER SUPPLY/RETURN CONNECTIONS —Install piping in accordance with all applicable codes. Positionvalves over the drain pan. Be sure valves are in proper operat-ing position and are easily accessible for adjustment. SeeFig. 69-72. Refer to Fig. 75 for copper water tube and jointmaterial pressure ratings. If coil and valve package connections will be made with asolder joint, care should be taken to ensure that the componentsin the valve package are not subjected to high temperatures,which may damage seals or other materials. Protect all valveaccessories with wet or damp rag wrapped around the bodyduring soldering / brazing process. See Fig. 76. Many 2-posi-tion electric control valves are provided with a manual operat-ing lever. This lever should be in the OPEN position during allsoldering operations. If coil connection is made with a union, the coil side of theunion must be prevented from turning (it must be backed up)during tightening. See Fig. 69-72 for common valve packages. The supply and return connections are marked and colorcoded on the coil stub out and valve package. Supply side ismarked as 'S' and return side is marked as 'R.' A blue letter indi-cates cooling side and a red letter indicates heating side. In caseof field-installed valves and piping, install chilled water valvecomponents in a way that any condensate dripping or sweatingcaused is contained in the extended drain pan or auxiliary drainor drip lip (optional). Optional drip lip is field installed andmay be packaged separately from the unit. NOTE: The project specifications for system pressure, pres-sure drop limitations, and flow rate should be checked prior toselection of specific components or the valve package size. 42C,D,V STEAM CONNECTIONS — On units with steamheating coils, the maximum steam pressure applied to the unitshould never exceed 10 psig. However, when steam is used ona 4-pipe application system with 1-row and 2-row coils themaximum steam pressure should never exceed 5 psig (suitablefor only low pressure steam). Do not drain the steam mains or take-off through the coils.Drain the mains ahead of the coils through a steam trap to thereturn line. Overhead returns require 1 psig of pressure at thesteam trap discharge for each 2 ft elevation to ensure continu-ous condensate removal. Proper steam trap selection and installation is necessary. Asa guideline in creating a steam trap locate the steam trap dis-charge at least 12 in. below the condensate return connection.This provides sufficient hydrostatic head pressure to overcometrap losses and ensure complete condensate removal. 42C,D,V DIRECT EXPANSION (DX) REFRIGERANTPIPING — Use the condensing unit manufacturer's recom-mended line sizes and requirements. Suction line must beinsulated for correct operation. Use refrigerant-grade copperlines only. The unit is not applied as a heat pump. Thermostatic expansion valve (TXV) and sensing bulb arefactory-installed on units when DX coil option is chosen withdistributor and TXV. NOTE: If a hot water coil is used in the reheat position, a field-supplied freezestat must be installed to protect the coil. TEST AND INSULATE — When all joints are complete,perform hydrostatic test for leaks. Vent all coils at this time.Check interior unit piping for signs of leakage from shippingdamage or mishandling. If leaks are found, notify your Carrierrepresentative before initiating any repairs. Release trapped airfrom system (refer to Step 7 — Make Final Preparationssection). Never pressurize any equipment beyond specific test pres-sure. Always pressure test with an inert fluid or gas, such asclear water or dry nitrogen to avoid possible damage or injuryin the event of a leak or component failure during testing. Following the hydrostatic test, insulate all piping to preventsweating. To ensure compliance with building codes, restore the struc-ture's original fire resistance rating by sealing all holes withmaterial carrying the same fire rating as the structure. CAUTION DO NOT OVERTIGHTEN! Overtightening will distort(egg shape) the union seal surface and destroy the union. Drain Pan Drain “P” Trap Clamp Unit WallNOTE: Field trim “P” trap as required to prevent kinking. Drain Clamp 2" Minimum Fig. 74 — “P” Trap Minimum Configuration CAUTION All water coils must be protected from freezing after initialfilling with water. Even if system is drained, unit coils maystill have enough water to cause damage when exposed totemperatures below freezing. 61 Fig. 75 — Copper Water Tube and Joint Material Pressure Ratings NOTES: 1. Not recommended for high system water pressures. 2. Standard factory joint material. JOINT MATERIALS A 50-50 Lead-Tin at 200 F Note 1 D 95-5 Tin-Antimony at 200 F Note 2B50-50 Lead-Tin at 150 F E 95-5 Tin-Antimony at 150 F C 50-50 Lead-Tin at 100 F F 95-5 Tin-Antimony at 100 F IMPORTANT: THE ABOVE CHART IS FORREFERENCE ONLY. Check all system componentpressure ratings (coils, valves, pumps, etc.) and anyapplicable local or national piping codes prior tospecifying system pressure rating. 62 Table 7 — Piping Components LEGEND *Check all system component pressure ratings (coils, values, pumps, etc.) with manufacturer and any applicable local or national piping codes prior to specifying system pressure rating. SYMBOL/SKETCH DESCRIPTION CV FACTOR RATING*STEAM USE1/2 3/4 PSI F MANUAL AIR VENT: Threaded brass needle valve with screwdriver slot for adjustment. Application — Body brazed into high point of heating and cooling coils for bleeding air from coil. Standard item on all hydronic coils (not used on steam or DX coils). Should not be used in lieu of main system air vents. N/A N/A 400 100 NO AUTOMATIC AIR VENT: Nickel plated brass valve, fiber-disc type, with positive shut-off ball- check and quick vent feature via knurled vent screw. Application — Optional replacement for man- ual air vent. Automatically passes minute quantities of air through the fiber discs which expand upon contact with water, completely sealing the valve. As air accumulates, the fiber discs dry and shrink, repeating the cycle. Not recommended for removing large quantities of air encountered during initial start-up or subse- quent draining and refilling. Should not be used in lieu of main system air vents. N/A N/A 125 240 NO SWAGE: Copper tube end expanded to accept a copper tube of the same size for factory or field brazing. Application — Used where possible for all tub- ing joints for best joint integrity. N/A N/A 300 200 YES UNION: Combination wrought copper/cast brass union assembly, solder by solder. Application — Used for quick connect (and dis- connect) of valve package components to min- imize field labor and facilitate servicing of unit. N/A N/A 300 200 YES INSERTION TEST PORT: Brass body valve for acceptance of test probe (up to 1/8 in. diameter). Application — Installed on one (or both) sides of the coil to allow for temperature or pressure sensing. Used for close tolerance water bal- ancing and service analysis. N/A N/A 250 250 NO PRESSURE TEST PORT: Brass body 1/4 ser- vice access fitting with removable depressor type core. Application — Installed on both sides of the coil to allow for pressure sensing. Attach pres- sure gages to facilitate close tolerance water balancing. N/A N/A 400 210 NO CIRCUIT SETTER: Variable water flow balanc- ing valve with manual adjustment knob, pointer, percent-open scale, memory stop and integral pressure read-out ports. Application — Used for close tolerance water flow balancing. Positive shut-off ball valve fea- ture allows usage as combination balancing and shut-off valve. 2.12 3.9 300 250 NO Cv —Coefficient of Velocity DX —Direct Expansion ETO —Engineering to Order 63 Table 7 — Piping Components (cont) LEGEND *Check all system component pressure ratings (coils, values, pumps, etc.) with manufacturer and any applicable local or national piping codes prior to specifying system pressure rating. SYMBOL/SKETCH DESCRIPTION CV FACTOR RATING*STEAM USE1/2 3/4 PSI F BALANCE VALVE: Variable water flow man- ual balancing valve with screwdriver slot adjustment screw. Application — Often used in conjunction with test port fittings for water flow balancing. Bal- ance by temperature differential or coil pres- sure drop (check specifications for service fittings required if balancing by pressure drop). May be used in 3-way valve bypass line to permit equal flow balancing. 4 14 300 250 NO FIXED FLOW VALVE: Flexible orifice type (non-adjustable). Application — Used for water flow balancing. Valve automatically adjusts the flow to within 10% of set point. Valve orifice size determines CV fac- tor. The orifice of these fixed flow valves changes as flow is regulated. As the water pres- sure increases, the orifice size decreases, thereby automati- cally limiting the flow rate to the specified gpm (±10%). 600 220 NO STRAINER: Y-type body with 20 mesh stain- less steel screen. Application — Used for removal of small par- ticles from system water during normal sys- tem operation. Should not be used in lieu of main system strainers. Strainer screen may have to be removed during initial high pres- sure system flushing during start-up. Screen should be removed and cleaned per normal maintenance schedule (provisions for strainer blow-down not provided). 9.0 Clean 19.0 Clean 400 150 N/A BALL VALVE: Manual balance and shut-off valve. Application — Used for unit isolation and water flow balancing. Without memory stop feature water balance point must be marked by installer (if necessary). Check specifica- tions for service fittings required when used for water balancing. 14.2 28.6 600 350 YES BALL VALVE WITH MEMORY STOP: Manual balance and shut-off valve. Application — Used for unit isolation and water flow balancing. The adjustable memory stop feature allows return to the balance point after shut-off. Check specifications for service fittings required when used for water balancing. 14.2 28.6 600 350 N/A a42-4282 Cv —Coefficient of Velocity DX —Direct Expansion ETO —Engineering to Order 64 Table 7 — Piping Components (cont) LEGEND *Check all system component pressure ratings (coils, values, pumps, etc.) with manufacturer and any applicable local or national piping codes prior to specifying system pressure rating. SYMBOL/SKETCH DESCRIPTION CV FACTOR RATING*STEAM USE1/2 3/4 PSI F 2-WAY MOTORIZED VALVE (25 PSI close off dif- ferential pressure): Electric 2-position flow control valve (open/closed). Normally closed body with man- ual override lever. Installed in supply line to unit. Application — All standard control and valve pack- ages are based upon normally closed valves (valve electrically powered open and closed by spring return when electric power removed). Manual over- ride lever allows valve to be placed in the open posi- tion for secondary (unit) flushing, constant water flow prior to start-up, etc. Manual override is automati- cally disengaged when valve is electrically activated. Consult factory for normally open valve applica- tions. 3.5 3.5 300 200 YES 15 PSI MAX. 2-WAY MOTORIZED VALVE (150 PSI close off dif- ferential pressure): Electric 2-position flow control valve (open/closed). Normally closed body with man- ual override lever. Installed in supply line to unit. Application — All standard control and valve pack- ages are based upon normally closed valves (valve electrically powered open and closed by spring return when electric power removed). Manual over- ride lever allows valve to be placed in the open posi- tion for secondary (unit) flushing, constant water flow prior to start-up, etc. Manual override is automati- cally disengaged when valve is electrically activated. Consult factory for normally open valve applica- tions. 4.9 10.3 300 240 NO 3-WAY MOTORIZED VALVE (25 PSI close off dif- ferential pressure): Electric 2-position flow control valve (closed to coil/open to bypass or open to coil/ closed to bypass). Normally closed with manual override lever. Installed in supply line to unit. Application — Same comments as 2-way motorized valve except with manual override lever engaged the valve is open to both ports and water flow will take the path of least resistance through the valve pack- age (not necessarily 100% through the coil). 4.0 4.0 300 200 N/A 3-WAY MOTORIZED VALVE (150 PSI close off dif- ferential pressure): Electric 2-position flow control valve (closed to coil/open to bypass or open to coil/ closed to bypass). Normally closed with manual override lever. Installed in supply line to unit. Application — Same comments as 2-way motorized valve except with manual override lever engaged the valve is open to both ports and water flow will take the path of least resistance through the valve pack- age (not necessarily 100% through the coil). 4.9 4.9 300 240 N/A Cv —Coefficient of Velocity DX —Direct Expansion ETO —Engineering to Order 65 Table 7 — Piping Components (cont) LEGEND *Check all system component pressure ratings (coils, values, pumps, etc.) with manufacturer and any applicable local or national piping codes prior to specifying system pressure rating. SYMBOL/SKETCH DESCRIPTION CV FACTOR RATING*STEAM USE1/2 3/4 PSI F MODULATING VALVE (Optional) (Non-Spring Return, Floating Point Actuator): Modulating valves are designed to control the flow in the circuit by making incremental adjustments to the flow path within the valve. Application — To control fluid flow in fan coil units. On the 42DD,SG,SJ,SH commercial fan coil models, the factory provided modulating valve has application restrictions. In these models, the valve packages are located in the airstream, downstream of the coil. Due to the ambient temperature limitations of the modu- lating valves, the valves can only be used in the units listed above with 2-pipe cooling only systems. 4.0 300 200 N/A MODULATING VALVE (Optional) (Non-Spring Return, Proportional Type Actuator): Modulating valves are designed to control the flow in the circuit by making incremental adjustments to the flow path within the valve. Application — To control fluid flow in fan coil units. On the 42DD,SG,SJ,SH commercial fan coil models, the factory provided modulating valve has application restrictions. In these models, the valve packages are located in the airstream, downstream of the coil. Due to the ambient temperature limitations of the modu- lating valves, the valves can only be used in the units listed above with 2-pipe cooling only systems. 4.0 300 200 N/A MODULATING VALVE (Requires ETO) (Spring Return): Modulating valves are designed to control the flow in the circuit by making incremental adjustments to the flow path within the valve. Application — Same comments as non-spring return except when powered, the actuator moves to the desired position, at the same time tensing the spring return system. When power is removed for more than two minutes the spring returns the actuator to the normal position. 4.0 300 200 N/A AQUASTAT: Water temperature sensing electrical switch. (Line Voltage Controls) Application — Clips directly on nominal size 1/2 in. or 3/4 in. copper tubing for water temperature sensing. Must be correctly located for proper control opera- tion. CHANGEOVER SENSOR: Water temperature sen- sor thermistor. Application — Sensor shall clamp on the outside diameter of the pipe. Sensor plate shall bend to allow its radius to be adjusted to fit the pipe. Sensor shall be secured to the pipe with mounting clamp. Insulate the mounting location of sensor on the pipe. Cv —Coefficient of Velocity DX —Direct Expansion ETO —Engineering to Order 66 Step 3 — Make Electrical Connections — Referto unit nameplate for required supply voltage, fan and heateramperage and required circuit ampacity. Refer to unit wir-ing diagram for unit and field wiring. See Fig. 77-79. Sinceeach project is different and each unit on a project may bedifferent, the installer must be familiar with the wiring dia-gram and nameplate on the unit before beginning any wir-ing. Make sure all electrical connections are in accordancewith unit wiring diagram and all applicable codes. The typeand sizing of all wiring and other electrical componentssuch as circuit breakers, disconnect switches, etc. should bedetermined by the individual job requirements, and shouldnot be based on the size and/or type of connection providedon the equipment. All installations should be made in com-pliance with all governing codes and ordinances. Compli-ance with all codes is the responsibility of the installingcontractor. The fan motor(s) should never be controlled by any wiringor device other than the factory-supplied switch or thermostat/switch combination unless prior factory authorization isobtained. Fan motor(s) may be temporarily wired for useduring construction only with prior factory approval and onlyin strict accordance with the instructions issued at that time. On 42S vertical stack units, the unit electrical supply is de-signed to enter through knockouts provided in the top of theunit and pass down through matching knockouts in the controlsection top. Where space allows, power may be pulled directlythrough the side of the cabinet into the control section. All components furnished for field installation by either thefactory or the controls contractor should be located andchecked for proper function and compatibility. All internalcomponents should be checked for shipping damage, and anyloose connections should be tightened to minimize problemsduring start-up. Any devices such as fan switches or thermostats that havebeen furnished from the factory for field installation must bewired in strict accordance with the wiring diagram that appearson the unit. Failure to do so could result in personal injury ordamage to components, and will void all manufacturer'swarranties. Units with factory-supplied and factory-installed aquastatsmay be shipped with the aquastats mounted on a coil stub-out.If this is the case, remove the aquastat before installing valvepackage. When reinstalling aquastats, consult the factory-piping diagram in the submittal for proper location. If the valvepackage is field-supplied, the aquastat must be installed in alocation where it will sense the water temperature regardless ofthe control valve position. A bleed bypass may be required toguarantee proper aquastat operation. The aquastat bypass lineallows a small amount of water to flow from the supply to thereturn piping when the control valve is closed. FACTORY-INSTALLED OPTIONS Condensate Overflow Switch — The condensate overflowswitch is used to detect a clogged condensate drain pan. Thecondensate switch uses a normally closed contact to allow thesystem control power to pass through the switch energizing thewater valves and fans allowing normal operation. When anoverflow condition is detected by the switch, it opens the NCcontact and de-energizes the water valve and fans. Field Tubing Wet Rag Torch Supply or Return Adaptor (Factory Installed) Stub From Coil Fig. 76 — Field Piping Connections Fig. 77 — High Voltage Wiring Service Switch (Side Location) Option 1 Incoming Power Option 2 Incoming Power Fig. 78 — High Voltage Power Connection (Unit Without Service Switch) Option 3 Incoming Power Fig. 79 — High Voltage Wiring Service Switch (Bottom Location) 67 Aquastat — The aquastat must be able to sense whether theflowing water is being chilled or heated and switches a contactclosed to provide automatic summer or winter changeover forthe system. When a two-pipe cooling/heating system withoptional auxiliary electric heat is desired, an additional aqua-stat is required. Units with optional factory furnished and installed aquastatsmay be shipped with aquastats mounted on the coil stub out. Inthis situation, remove the aquatat before valve package installa-tion. Refer Fig. 70 for factory piping diagram for proper loca-tion when reinstalling the aquastats. If the valve package isfield supplied,the aquastat must be installed in a location whereit will sense the water temperature regardless of control valveposition. A bleed bypass should be provided for proper opera-tion of aquastat. The bleed line allows a small amount of waterto flow from supply to return piping when the control valve isclosed for loop temperature sensing. All field wiring must be in accordance with governingcodes and ordinances. Any modification of unit wiring withoutfactory authorization will invalidate all factory warranties andnullify any agency listings. The manufacturer assumes no re-sponsibility for any damages and/or injuries resulting from im-proper field installation and/or wiring. Units may be equipped with line voltage controls or24 VAC control systems. The following descriptions are for typical control sequences only. For detailed control operatingsequence, refer to thermostat operating instructions. STANDARD WIRING PACKAGES Manual Fan Control — On vertical cabinet units, a fan-speedswitch may be furnished unit-mounted and wired. See Fig. 80.On vertical furred-in units and horizontal units, the switch maybe shipped separately on a decorative wall plate for fieldmounting and wiring. See Fig. 81. The standard switch has LOW, MEDIUM, HIGH and OFFpositions plus an auxiliary contact to energize thermostats,valves, dampers, etc. NOTE: Wiring diagrams are for typical applications. If othervoltages for heaters or controls are specified, wiring may differfrom that shown. Refer to wiring diagram on unit blower hous-ing for unit specific wiring. Thermostatic Electric Valve Control, 2-Pipe — A thermo-statically controlled 2-position valve provides superior controlto fan cycling. With this control, the fan runs continuously un-less it is manually switched to the OFF or AUTO position. Thefan must be on before the valve can be opened to supply waterto the coil. This system can be used for normal 2-pipe changeover systemsand can also be furnished for cooling-only or heating-only ap-plications by omitting the changeover and specifying whichapplication is intended. See Fig. 82 and 83 for line voltage con-trol. See Fig. 84 and 85 for 24-v control. Wiring diagrams showtypical applications. Refer to wiring diagram on unit blowerhousing for unit specific wiring. IMPORTANT: Wiring diagrams shown depict typicalcontrol functions. Refer to unit wiring label for specificfunctions. Fig. 80 — No Controls — Unit-Mounted 3-Speed Switch Only 68 Fig. 81 — No Controls — Wall-Mounted 3-Speed Switch Only NOTES: 1. Motors are thermally protected. 2. Use copper conductors only. 3. See unit nameplate for power supply. Provide disconnect means and overload protection as required. 4. Unit-mounted thermostats are not recommended for fan control because of poor temperature sensing. Fan control not available on 42VC,VE lowboy units. Fig. 82 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Automatic Changeover — Unit-Mounted Thermostat (Line Voltage) NEC CLASS 1 WIRING 120-V WHT ALL OTHERS BLK' a42-4223 69 Fig. 83 — 42C,S,V and 42D (600-1000) 2-Pipe Heating and Cooling with Automatic Changeover — Remote/Wall-Mounted Thermostat (Line Voltage) a42-4058 120-V WHT ALL OTHERS BLK' NEC CLASS 1 WIRING Fig. 84 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Heating and Cooling with Automatic Changeover — Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor a42-4059 70 Fig. 85 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Automatic Changeover — Remote/Wall-Mounted Debonair® Thermostat (24-v) a42-4061 NEC CLASS 2 WIRING 71 Thermostatic 2-Pipe Auxiliary Electric Heat with ValveControl — This system, also called twilight or intermediateseason electric heat, goes a long way towards solving thespring and fall control problems of 2-pipe systems. Chilled water can be run late into the fall, turned on early inthe spring and electric heat will still be available to all unitswhenever required. In winter the system is switched over to hot water. Twochangeover devices are required for this. One device switchesthe action of the thermostat and the other locks out the electricheat when hot water is in the coil. With this system, the fan runs continuously unless manuallyswitched to OFF or AUTO position. Fan must be on beforethermostat can send signal to open chilled water valve or turnon electric heater. Two control methods are available: 1. Use the standard automatic changeover thermostat with adead band between heating and cooling. 2. Use a manual changeover thermostat. With this methodonly one changeover is required. Be sure to include a 2-way or 3-way electric valve with thissystem. NOTE: Wiring diagrams are for typical applications. If othervoltages for heaters or controls are specified, wiring may differfrom that shown. See Fig. 86 for line voltage control. SeeFig. 87 and 88 for 24-v control. Refer to wiring diagram onunit blower housing for unit specific wiring. Fig. 86 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source UNIT MOUNTED J BOX EQUIPMENT GROUND L2 or N L1 THERMOSTAT PART # 702893-36 W/REDHI W/ORGL1 BLKLOW W/BRNHEAT REDCOOL BLUPURORGL2 OR N YELVALVE REMOTE DEVICE BOX *WHT LIMIT SWITCH AQUASTATS CONTACTOR 1 L1L2 OR NGRN*WHT BLKBLKBLK *WHT WHT BLK RED PUR BRN BRN RED *WHT BLOWER MOTOR HBLK COM WHT BLUM REDL QUICK CONNECT OPTIONAL RED BLU BLK *WHT ONLY 120V WHT/ALL OTHERS BLK RISE BLK BLU RED RISE BLK BLU RED 72 Fig. 87 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat — Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual Power Source QUICK CONNECT33 G G2/(W) G3/(Y) COM FAN (VALVE) (COOL)HI (HEAT)MED LOWTRANSFORMER 24 ORG YEL WHT/REDBLK VALVE BLK Q/C BLK YEL YEL YELBLUBLKPURREDORGBLK BLOWER MOTOR COMWHT BLK H BLU M RED L4 3 2 1 *WHT 2 1 BLK LIMIT SWITCH BLK BLKBRNBRN WHT GROUND EQUIPMENT L1 N RED BLU BLK BLK YELG THERMOSTAT #33CSSN2-FC RG3Y1 W1 CG2 H2O CK1RSRS+5 DUCT SENSOR 33CSSEN-DS RED BLK WHT GROUND EQUIPMENT L2 or N L1 *WHT BLK SENSOR CHANGE OVER BLK BLK YEL RED BLU BLK *WHT CONTACTOR ELEC. HEATER 2 NO 6 COM4 3 NC 0 06 8 7 1 Fig. 88 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) a42-4067 NEC CLASS 2 WIRING 73 Thermostat 2-Pipe Total Electric Heat with ValveControl — With this system, the complete heating require-ment for the space is provided by the electric heater; the watersystem is never changed over for heating. It is therefore possi-ble, just as with 4-pipe systems, to have heating or cooling atany time of the year. The fan runs continuously unless it is manually switched toOFF or AUTO position. Fan must be on before thermostat cansend signal to open chilled water valve or turn on electricheater. Normally, an automatic changeover thermostat with a deadband between heating and cooling is used, but a manualchangeover thermostat is also suitable. A 2-way or 3-way valvemust also be used so that the chilled water is off whenever theheater is on. No changeover device to sense water temperatureis necessary. NOTE: Wiring diagrams are for typical applications. If othervoltages for heaters or controls are specified, wiring may differfrom that shown. See Fig. 89 for line voltage control. SeeFig. 90 and 91 for 24-v control. Refer to wiring diagram onunit blower housing for unit specific wiring. Fig. 89 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Thermostat (Line Voltage) 74 Fig. 90 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat — Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor a42-4072 NOTE: Units may have 2 or 4 elements. Elements wired in parallel. Fig. 91 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source G THERMOSTAT #33CSSN2-FC RG3Y1 W1 CG2 H2O CK1RSRS+5 REMOTE DEVICE BOX QUICK CONNECT NEC CLASS 2 WIRING (HEAT) (COOL) (VALVE) FAN GROUND EQUIPMENT N L1 L2 or N EQUIPMENTGROUND L1 BLK WHT 24 TRANSFORMER *WHT BLK BLK ORG *WHT WHT/RED YEL YEL LOW 2 Q/CBLK1 BLK YEL YEL 33ZCRLYBRD G3/(Y) G2/(W) COM G REDORGPURBLKBRNBLUYEL*WHT WHT COM BLK BRN MED LIMIT SWITCH BLK 1 HI BLK RED BLK BLU LRED BLU BLK 3 2 4 H M MOTOR BLOWER COOL VALVE ELEC. HEATER 84 NO2 6 06 NC COM 3 0 7 1 75 Thermostatic Valve Control, 4-Pipe — The 4-pipe systemprovides the ultimate in economy and room temperature con-trol. Both hot water and chilled water are available at any time. Normally an automatic changeover thermostat is used, but amanual changeover thermostat is also suitable. Two 2-wayvalves, two 3-way valves, or one 2-way plus one 3-way valvemust be selected. An automatic changeover device to sensewater temperature is not required. With this system, the fan runs continuously unless it ismanually switched to OFF/AUTO position. Fan must be on be-fore thermostat can send signal to open the chilled water or hotwater valve. NOTE: Wiring diagrams are for typical applications. If othervoltages for heaters or controls are specified, wiring may differfrom that shown. See Fig. 92 for line voltage control. SeeFig. 93 and 94 for 24-v control. Refer to wiring diagram onunit blower housing for unit specific wiring. Fig. 92 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Thermostat (Line Voltage) ONLY 120V WHT/ALL OTHERS BLK 76 Fig. 93 — 42SG,SH,SJ,VA,VB,VC,VE,VF 4-Pipe Heating and Cooling — Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor a42-4078 Fig. 94 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Debonair® Thermostat (24-v) G THERMOSTAT #33CSSN2-FC RG3Y1 W1 CG2 H2O CK1RSRS+5 QUICK CONNECT REMOTE DEVICE BOX NEC CLASS 2 WIRING 33ZCRLYBRD G G2/(W) G3/(Y) COM FAN (VALVE) (COOL)HI (HEAT)MED LOW TRANSFORMER 24 YEL BLK VALVE BLK Q/C BLK YEL YEL YELBLUBLKPURREDORGBLK BLOWER MOTOR COMWHT BLK H BLU M RED L COOL 4 3 2 1 GROUND EQUIPMENT L1 L2 or N *WHT 2 1 BLK *WHT BRNBLK 1HEAT VALVE BLK Q/C 2 YEL BRN PUR RED BLU BLK YEL 77 Step 4 — Make Duct Connections — Install allductwork to and from unit in accordance with project plans,specifications, and all applicable codes. Duct construction mustallow unit to operate within duct external static pressure limitsas shown on job submittals. Units designed to operate withductwork may be damaged if operated without intended duct-work attached. Units provided with outside air should have some methodof low-temperature protection to prevent freeze-up. This pro-tection may be any of several methods, such as a low tempera-ture thermostat to close the outside air damper or a preheat coilto temper the outside air before it reaches the unit. It should benoted that none of these methods will adequately protect thecoil in the event of power failure. The safest method of freezeprotection is to use glycol in the proper percent solution for thecoldest expected air temperature. Insulate ductwork as required. Use flexible connections tominimize duct-to-unit alignment problems and noise transmis-sion where specified. Set unit markings for minimum clearance to combustiblematerials and first 3 ft of ductwork. Install ductwork, accessorygrilles and plenums so that they do not restrict access to filter.The manufacturer assumes no responsibility for undesirablesystem operation due to improper system design, equipment orcomponent selection, and/or installation of ductwork, grilles,and other related components. Step 5 — Frame and Finish Unit — Models 42SG,SH, SJ, SU and SM have factory enclosures and may be fin-ished with normally accepted wall covering. However, drywall secured with adhesive bonding alone is not recommended. The 42S units are designed to have gypsum board or othertypes of wall board applied directly to the unit cabinet surface to a maximum combined thickness of 5/8-inch. Use low-pro-file sheet metal panhead screws to secure wallboard to unitframe. Fasteners may penetrate the cabinet no more than 1/2inch. These fasteners must be located to avoid damage to internalcomponents and wiring in the same manner as anchoring fas- teners. Do not apply sheet metal screw or nails where they can penetrate coil, riser pipes, or electrical junction box and race-ways. Do not secure wallboard to drain pan edges or to control box enclosure. Condensate leaks or electrical shorts may result. An alternate method of enclosing the unit is to frame one or more sides with studding and apply the wall board to this fram- ing. This method requires specific unit features and return ac-cess panels when used on the return-air side of a unit. Units not properly equipped will exhibit poor cooling and/or heating per- formance and could experience excessive or premature compo-nent failures. Prevent sheetrock dust or other debris from settling on coil fins, motor-blower assembly or other unit interior surfaces. EXPOSED UNIT FINISH, TOUCH-UP ANDREPAINT — Return access and exposed cabinet units may be furnished with a baked enamel finish. Small scratches in thisfinish may be repaired with touch-up paint available from thefactory. Some colors of touch-up paint are available in aerosol containers and all touch-up paint is available in pint, quart, andgallon cans. To repaint the factory-baked enamel, the finish should beprepared by light sanding with no. 280 grit sand paper orno. 000 or no. 0000 fine steel wool. The surface may also bewiped with a liquid surface etch cleaning product such as “NoSand” or “Pasceo.” These items should be available at mostpaint product stores. It should be noted that the more conscien-tiously this preparation is done, the more effective it will be. After this preparation is accomplished, the factory finishshould provide excellent adhesion for a variety of air-dried topcoats. Enamel will give a more durable, higher gloss finish,while latex will not adhere as well and will give a dull, softerfinish. Top coats involving an exothermic chemical process be-tween two components, such as epoxies and urethanes, shouldbe avoided. Factory aerosol touch-up paint may require a number oflight “dust coats” to isolate the factory-baked enamel finishfrom the quick drying touch-up paint. Step 6 — Cut Out Openings for Grilles and Thermostats — On all units with optional supply-air orreturn-air grilles, dampers, thermostats, and switch plates, cutout openings where specified on the job plans. Be careful not tocut wires, piping or structural supports. For remote-mounted thermostats use a steel thermostatshield ring to protect drywall from thermostat wiring whereapplicable. If not included on the unit or furnished from the factory,supply and return grilles should be provided as recommendedin the product catalog. Step 7 — Make Final Preparations 1. Turn off power to the unit (open unit electrical disconnect). 2. Install thermostats and perform any other final wiring asapplicable. Check the unit for any loose wires. 3. Perform a final visual inspection. All equipment, ple-nums, ductwork, and piping should be inspected to verifythat all systems are complete and properly installed andmounted, and that no debris or foreign articles such as pa-per or drink cans are left in the units or other areas. Cleandirt, dust, and other construction debris from unit interior.Be sure to check fan wheel and housing. 4. Rotate fan wheel by hand to be sure it is free and does notrub housing. Check that wing nuts securing fan assemblyto fan deck are tight. 5. Ensure all panels and filters are installed before checkingfan operation. Turn on power to the unit. 6. Install filter in frame at front of coil. If field-suppliedfilters are used, be sure size is as specified in Tables 1-4. 7. ECM (Electronically Commutated) Blower: If the unit is equipped with an ECM blower, additionalsteps may be required during the air balancing process. CAUTION Prevent dust and debris from settling in unit. If wall finishor color is to be spray applied, cover all openings to pre-vent spray from entering unit. Failure to do so could resultin damage to the unit and/or the reduction of unit effi-ciency. CAUTION Proper safety procedures should be followed regardingventilation and safety equipment during touch-up andrepainting since materials may pose a health hazard. Themanufacturer's directions should be followed for the prod-ucts being used. CAUTION Do not start up or operate unit without filter. Be sure filterand unit interior are clean. Failure to do so could result indamage to the equipment or building and furnishings and/or void all manufacturer's warranties. 78 The ECM blower is controlled by one of three controlboards, depending on the options ordered with the unit.Review project submittals or order acknowledgement todetermine which ECM control scheme the unit has. Alter-natively, match the control board to the illustrations iden-tified in the Control Board Type section. 8. Check the fan and motor operation. 9. Be sure drain line is properly and securely positioned andthat the line is clear. Pour water into drain to checkoperation. 10. Prior to the water system start-up and balancing, thechilled/hot water systems should be flushed to clean outdirt and debris which may have collected in the pipingduring construction. During this procedure, the systemshould be flushed from the supply riser to the return riserthrough a cross-over loop at the end of the riser column,and all unit service valves must be in the closed position.This prevents foreign matter from entering the unit andclogging the valves and metering devices. Strainersshould be installed in the piping mains to prevent this ma-terial from entering the units during normal operation.Vent all air from unit coil and related piping. Air ventingfrom the unit is accomplished by the use of the standardmanual air vent fitting, or the optional automatic air ventfitting installed on the coil. Venting can be accomplishedby depressing the needle valve core. Automatic air ventsmay be unscrewed one turn counterclockwise to speedinitial venting, but should be screwed in for automaticventing after start-up operations. When steady steam ofwater begins to escape, close valve. Vent release air slow-ly, usually dripping water into drain pan in the process. Make sure all service valves are open and that the motor-ized control valves, if supplied, are set for automaticoperation. 11. Check all control valves in the system for proper opera-tion in accordance with valve manufacturer's instructions. 12. For units with factory-installed ball valves with lever han-dles — When handle is perpendicular to valve body, thereis no flow through valve. Ball valves may be used asshutoff valves. ECM CONTROL OPTION 3-Speed Jumper Field Adjustment (42SM Only) (SeeFig. 95) — The unit has been factory configured to producePSC equivalent airflow on high speed, with medium and lowspeed set at 80% and 60% of high, respectively. If these settingare acceptable, then no further configuring is required. To adjust airflow, relocate board mounted jumpers as indi-cated on configuration chart. Chart is located on control boxcover. 3-Discrete Speed Rheostat Field Adjustment (42SM Only)(See Fig. 96)— The unit has been factory configured to pro-duce PSC equivalent airflow on high speed, with medium andlow speed set at 80% and 60% of high, respectively. If thesesetting are acceptable, then no further configuring is required.Board mounted rheostats are provided to adjust the airflow per-taining to each output. Each output can be adjusted from 0 to100% of the motor’s factory programmed operating range. Toset airflow, connect a volt-meter between “common” (near thered status LED) and Flo1 through Flo4. Carrier’s convention is to preset and wire Flo1 for highspeed, Flo2 for medium, and Flo3 for low. Flo4 is not usedwith any standard thermostat, but may be employed for a moreadvanced application. The chart on the control box cover asso-ciates airflow rates with the voltage indicated on your volt-me-ter. For each speed, adjust the rheostat until indicated voltagematches the desired value from the airflow table. If a factory provided thermostat or DDC (Direct DigitalControls) controller is utilized, then the unit is already correctlyconfigured. A field furnished thermostat or control may requireadjustment of board jumpers. CAUTION The air vent provided on the unit is not intended to replacethe main system air vents and may not release air trappedin other parts of the system. Inspect the entire system forpotential air traps and vent those areas as required, inde-pendently. In addition, some systems may require repeatedventing over a period of time to properly eliminate air fromthe system. Failure to properly vent system may negativelyaffect operation. CAUTION Both of the procedures described below require the controlbox to be powered while adjustments are made. Line volt-age components are concealed behind a secondary cover.However, installer should still take all reasonable precau-tions to prevent electrical shock. MED SPEED W/W1 0 EM/W2BK/ PWMRR OUT R3G LOW SPEED ADJUST HIGH SPEED Y/Y2C/BY1D11D10A B C D A B C D A B C D 1 + – 1 Fig. 95 — ECM Jumper Speed Board (42SM Only) A42-4310 Flo0 Com Status Rp1 Flo1 Rp2 U3 Flo2 Rp3 Flo3 Rp4 Flo4 Rp5 COMMON FLO1 FLO2 FLO3 FLO4 Fig. 96 — ECM Rheostat Speed Board (42SM Only) a 79 Variable Airflow for 0-10 Vdc Input (42SM Only) (SeeFig. 97) — Carrier recommends using the specified thermostator DDC controller to commission the unit whenever possible.However, the blower can be started and operated without thethermostat. To do so, locate the airflow adjustment screwwhich is accessible from the inside of the control box. Withservice switch in the “ON” position, turn the adjustment screw.The unit has now been placed in manual override. Manualoverride will expire when one of the following conditions issatisfied: • Power to the unit is cycled• 15 minutes elapse with no change to adjustment screw• Unit receives a control signal from the thermostat orcontroller 3-Speed Jumper Field Adjustment (See Fig. 98) — The unithas been factory configured to produce PSC equivalent airflowon high speed, with medium and low speed set at 80% and60% of high, respectively. If these settings are acceptable, thenno further configuring is required. If alternative airflows are desired, use board mounted potsto adjust the airflow associated with each input. Each outputcan be adjusted from 0 to 100% of the motor’s factory pro-grammed operating range. Use voltmeter and airflow chart (oncontrol box cover) to set values. Refer to Appendix A for ad-justment procedure. 4-Discrete Speed Potentiometer Field Adjustment, SolidState — The unit has been factory configured to produce PSCequivalent airflow on high speed, with medium and low speed set at 80% and 60% of high, respectively. If these settings areacceptable, then no further configuring is required. Board mounted pots are provided to adjust the airflow per-taining to each output. Each output can be adjusted from 0 to100% of the motor’s factory programmed operating range. Usevoltmeter and airflow chart (on the control box cover) to setvalues. Refer to Appendix B for adjustment procedure. Variable Airflow for 0-10 Vdc Input (See Fig. 99) — If afactory provided thermostat or DDC controller is utilized, thenthe unit is already correctly configured. Carrier recommends using the specific thermostat or DDCcontroller to commission the unit whenever possible. Howev-er, the blower can be started and operated without the thermo-stat. To do so, locate jumper 7 near the large capacitor. Move J7from 0-10 to Man. Once moved, the onboard pots control fanspeed. To switch the fan in this configuration, place a dry con-tact inline or on the enable wire. START-UP Before beginning any start-up operation, the start-up per-sonnel should familiarize themselves with the unit, options andaccessories, and control sequence to understand the proper sys-tem operation. All personnel should have a good workingknowledge of general start-up procedures and have the appro-priate start-up and balancing guides available for consultation. The building must be completely finished including doors,windows, and insulation. All internal walls and doors shouldbe in place and in the normal position. In some cases, the inte-rior decorations and furniture may influence overall systemperformance. The entire building should be as complete aspossible before beginning any system balancing. Except as required during start-up and balancing operations,no fan coil units should be operated without all the proper duct-work attached, supply and return grilles in place, and all accessdoors and panels in place and secure. Fig. 97 — ECM Proportional Speed Board a42-4313 L2LOWMEDHIGHVR1 VR2 VR3 K1 K2 K3 LOWMEDHIGHCOMC1 C2 C3 CR1 L1POTS Fig. 98 — 3-Speed Potentiometer Adjustment CAUTION Both of the start-up and servicing procedures describedbelow require the control box to be powered while adjust-ments are made. Line voltage components are concealedbehind a secondary cover. However, installer should stilltake all reasonable precautions. Fig. 99 — ECM Proportional Speed Board a42-4313 80 Start-up procedures vary depending on time of year (sum-mer or winter) and building characteristics (new building/oldbuilding, occupied/unoccupied, etc.) Start-up in the cooling mode requires that proper care begiven to avoid condensation problems. Condensation forms onsurfaces that are colder than the dew point of the surroundingair. If a unit is started and is piped with low-temperature chilledwater in a hot, humid atmosphere, condensation will form onmany parts of the unit. In order to avoid excessive condensa-tion, higher temperature water should initially be used (approx-imately 65 to 70 F) and the fan coil control set at low or medi-um fan speed. Be sure the fan current does not exceed motornameplate values. Also, outside air supply fans, and bathroomand kitchen exhaust fans should be off. As the building temperature drops, the chilled water temper-ature can be gradually reduced until it reaches 50 F. At thispoint the outside air fans can be turned on. When the chilledwater temperature is reduced to its design point, the exhaustfans can be turned on. Cooling/Heating System — Prior to the water systemstart-up and balancing, flush the chilled / hot water systems toclean out dirt and debris which may have collected in the pip-ing during construction. During the process, all unit servicevalves must be in the closed position to prevent foreign matterfrom entering the unit and clogging the valves and metering de-vices. Strainers should be installed in the piping mains to pre-vent such material from entering units during normal opera-tion. During system filling, air venting from the unit is accom-plished by the use of standard manual air vent or optional auto-matic air venting installed on the coil. Manual air vents are ba-sically Schrader valves. For air venting, depress the valve unitthe air has vented the coil. When water begins to escapethrough the valve, release the valve. Automatic air vents maybe unscrewed one turn counterclockwise to speed initial vent-ing but should be screwed in for automatic venting after start-up operation. See Fig. 100 and 101. Air System Balancing — All duct stubs, grilles, filters, and return-access panels must be properly installed to establishactual system operating conditions BEFORE beginning air bal- ancing operations. Each individual unit and the attached ductwork is a uniquesystem with its own operating characteristics. For this reason, air balancing is normally done by balance specialists who are familiar with all procedures required to properly establish airdistribution and fan-system operating conditions. These proce- dures should not be attempted by unqualified personnel. Units with no ductwork have air volumes predetermined atthe factory by supply grille size and normally do not require air balancing other than selecting the desired fan speed. Units fur- nished with optional dampers on supply grilles may requiresome small adjustments to “fine tune” the air delivery to each grille. Opposed blade balancing dampers are not available for all grilles on a unit with electric heat. After proper system operation is established, the actual unitair delivery and the actual fan motor amperage draw for eachunit should be recorded in a convenient place for future refer-ence. Water System Balancing — A complete knowledgeof the hydronic system, along with its components and con-trols, is essential to proper water system balancing. This proce-dure should not be attempted by unqualified personnel. Thesystem must be complete, and all components must be in oper-ating condition BEFORE beginning water system balancingoperations. Each hydronic system has different operating characteristicsdepending on the devices and controls used in the system. Theactual balancing technique may vary from one system toanother. After the proper system operation is established, the appro-priate system operating conditions such as various water tem-peratures and flow rates should be recorded in a convenientplace for future reference. Before and during water system balancing, conditions mayexist due to incorrect system pressures which may result in no-ticeable water noise or undesired valve operation. After the en-tire system is balanced, these conditions will not exist on prop-erly designed systems. Water Treatment — Proper water treatment is a special- ized industry. Carrier recommends consulting an expert in thisfield to analyze the water for compliance with the water qualityparameters listed in Table 8 and to specify the appropriate wa- ter treatment regimen. The expert may recommend typical ad- ditives such as rust inhibitors, scaling preventative, antimicro-bial growth agents or algae preventatives. Anti-freeze solutions may be used to lower the freezing point. Carrier’s water coil tubes and headers are constructed ofpure copper. Multiple brass alloys may be present in the valve package, depending on unit configuration. It is the user's re- sponsibility to ensure the tube and piping materials furnishedby Carrier are compatible with the treated water. Failure to provide proper water quality will void the fan coils unit's warranty. Table 8 — Water Quality Concentrations Controls Operation — Before proper control operationcan be verified, all other systems must be operating properly.The correct water and air temperatures must be present for thecontrol function being tested. Some controls and features aredesigned to not operate under certain conditions. For example,on a two-pipe cooling/heating system with auxiliary electricheat, the electric heater cannot be energized with hot water inthe system. A wide range of controls, electrical options and accessoriesmay be used with the equipment covered in this manual. Con-sult the approved unit submittals, order acknowledgements, Fig. 100 — Manual Air Vent Fig. 101 — Automatic Air Vent WATER CONTAINING REQUIRED CONCENTRATION Sulphate Less than 200 ppm pH 7.0 to 8.5 Chlorides Less than 200 ppm Nitrate Less than 100 ppm Iron Less than 4.5 mg/l Ammonia Less than 2.0 mg/l Manganese Less than 0.1 mg/l Dissolved Solids Less than 1000 mg/l CaCO3 Hardness 300 to 500 ppm CaCO3 Alkalinity 300 to 500 ppm Particulate Quantity Less than 10 ppm Particulate Size 800 micron max 81 and other literature for detailed information regarding each in-dividual unit and its controls. Since controls and features mayvary from one unit to another, care should be taken to identifythe controls used on each unit and their proper controlsequence. Information provided by component manufacturersregarding installation, operation, and maintenance of their indi-vidual controls is available upon request. When changing from one mode to another (cooling to heat-ing or heating to cooling), it may take some time to actually no-tice a change in the leaving air temperature. In addition, someunits may be designed for a very low air temperature rise inheating. Before declaring a unit inoperative or a componentdefective, it may be necessary to verify operation by more thanone method. SERVICE Excessive Condensation on Unit — Running chilledwater through a fan coil unit with the unit fan off can causeexcessive condensation. If fan cycling is used, a water flowcontrol valve should be installed to shut off the water when thefan stops. Other methods of control that avoid condensation problemsare as follows: 1. Continuous fan operation with motorized chilled watervalve controlled by a thermostat. 2. Continuous fan operation with thermostat control toswitch fan from high to low speed (instead of off). To Clean Coil 1. Be sure electrical service switch is open, locked, andtagged while working on unit. 2. Remove return-air grille access panel and brush betweencoil fins with stiff wire brush. Care should be taken to notdamage coil fins. Follow-up by cleaning with vacuumcleaner. If coil is cleaned with air hose and nozzle, takecare not to drive dirt and dust into other components.Blow air through the coil fins from the leaving air face.This should again be followed by vacuuming. Units pro-vided with the proper type of air filters, replaced regular-ly, will require less frequent coil cleaning. 3. Install clean filter. Refer to Clean or Replace Air Filterssection. Check Drain — Lock open and tag unit electrical service switch. Check drain pan, drain line and trap before initial start-upand at start of each cooling season. A standard type pipe clean- er for 3/4-in. ID pipe can be used to ensure that pipe is clear ofobstruction so that condensate is carried away. Check the drainline at filter cleaning time during the cooling season. Be sure that debris has not fallen into unit through supply-air grille.Should the growth of algae and/or bacteria be a concern, con-sult an air conditioning and refrigeration supply organization familiar with local conditions for chemicals or other solutions available to control these agents. Fan Motor Bearings — Lock open and tag unit electri-cal service switch. Standard motors are permanently sealed and lubricated. Nolubrication is required unless special motors have beensupplied or unusual operating conditions exist. Clean Fan Wheel — Lock open and tag unit electricalservice switch. For access to fan assembly, remove front or bottom panel.Fan assembly may be removed from its tracks if unit has a longconduit lead. Dirt and debris should not be allowed to accumu-late on the blower wheel or housing. This can result in an un-balanced blower wheel condition which can damage a blower wheel or motor. The wheel and housing may be cleaned peri-odically using a vacuum cleaner and a brush, taking care not todislodge the factory balancing weights on the blower wheelblades. Clean Electric Heater — Lock open and tag unit elec-trical service switch. 1. Remove dust, dirt, or foreign material before start-up. Donot block normal airflow to and from units; blockage maydamage electric heaters. 2. Clean heater elements with soft brush or vacuum cleaneras necessary. 3. To replace blown fusible links (nichrome heaters only): a. Remove fan deck (horizontal units only) foraccess to heater. b. Remove nut securing link at each end; install newlink; reinstall nuts. c. Reinstall fan deck (if removed). Electric resistance heaters typically require no normal peri-odic maintenance when unit air filters are changed properly.The operation and service life may be affected by other condi-tions and equipment in the system. The two most important op-erating conditions for an electric heater are proper airflow andproper supply voltage. High supply voltage and/or poorly dis-tributed or insufficient airflow over the element will result inelement overheating and possible limit switch opening. Thiscondition may result in the heater cycling on the high-limitthermal cutout. Sheath heaters have automatic reset switchesonly. Open strip heaters have an automatic reset switch with abackup, high-limit thermal switch. Automatic reset switch re-sets automatically after the heater has cooled down. High limitthermal switch must be replaced once the circuit has been bro-ken. The high-limit thermal cutout device is a safety deviceonly and is not intended for continuous operation. With properunit application and operation, the high-limit thermal cutoutwill not operate. This device only operates when a problem ex-ists, and ANY condition that causes high-limit cutout MUSTbe corrected immediately. High supply voltage also causes ex-cessive amperage draw and may trip the circuit breaker or blowthe fuses on the incoming power supply. After proper airflow and supply power are assured, regularfilter maintenance is important to provide clean air over theheater. Dirt that is allowed to deposit on the heating elementwill cause hot spots and eventual element burn through. Thesehot spots will normally not be enough to trip the high-limitthermal cutout device and may not be evident until actual heat-er element failure. Clean or Replace Air Filters — Lock open and tagunit electrical service switch. At the start of each cooling season and after each month of operation (more or less depending on operating conditions) re- place throwaway filter or clean permanent filter. THROWAWAY FILTER — The type of throwaway filter most commonly used on fan coil units should be replaced on a regular basis. The time interval between each replacementshould be established based on regular inspection of the filter and should be recorded in the log for each unit. Replace filter with a good quality filter of the size shown in Tables 1-4. Donot attempt to clean and reuse disposable filters. If the replace- ment filters are not purchased from the factory, the filters used should be the same type and size as those furnished from orrecommended by the factory. Consult the factory for applica-tions using filter types other than the factory standard or optional product. Filters with high arc pressure drops are gen-erally not compatible with the fan coil units in this manual. PERMANENT FILTER — A maintenance schedule for per- manent filters should be developed in the same manner asthrowaway filters. Unlike throwaway filters, permanent filters 82 may be cleaned and re-installed in the unit instead of being dis-carded when dirty. 1. Tap on solid surface to dislodge heavy particles. 2. Wash in hot water. If needed, use mild solution of com-mercial solvent such as sal soda or trisodium phosphate. 3. Set filter on end so that water drains out through slots inframe. Allow filter to dry thoroughly. 4. Recharge filter with Film-Cor or similar recharging oil.Three ounces is sufficient for medium size filter. Oil maybe applied by insect spray gun. For easier spraying, the oilcan be warmed. If the filter is dipped in the recharging oil, remove it im-mediately and allow draining through slots in frame. 5. Replace filter in unit. If another type of filter is used, follow the filter manufacturer'sinstructions. Electrical Wiring and Controls — The electricaloperation of each unit is determined by the components andwiring of the unit. This may vary from unit to unit. Consult thewiring diagram attached to the unit for the actual type andnumber of controls provided on each unit. The integrity of all electrical connections should be verifiedat least twice during the first year of operation. Afterwards, allcontrols should be inspected regularly for proper operation.Some components may experience erratic operation or failuredue to age. Wall thermostats may also become clogged withdust and lint and should be periodically inspected and cleanedto provide reliable operation. When replacing any components such as fuses, contractors,or relays, use only the exact type, size and voltage componentas furnished from the factory. Any deviation without factoryauthorization could result in personal injury or damage to theunit. This will also void all factory warranties. Only factory-supplied replacement parts ensure that the warranty and agencystatus remain in effect. All repair work should be done in sucha manner as to maintain the equipment in compliance withgoverning codes, ordinances and testing agency listings. More specific information regarding the use and operatingcharacteristics of the standard controls offered by the manufac-turer are contained in other manuals. Valves and Piping — No formal maintenance is re-quired on the valve-package components most commonly usedwith fan coil units other than a visual inspection for possible leaks in the course of other normal periodic maintenance. In theevent that a valve should need replacement, the sameprecautions taken during the initial installation to protect the valve package from excessive heat should also be used duringreplacement. Filters — The type of throwaway filter most commonlyused on fan coil units should be replaced on a regular basis.The time interval between each replacement should be estab-lished based on regular filter inspection and should be recordedin the log for each unit. Refer to product catalog for recom-mended filter size for each product type and size. If the replace-ment filters are not purchased from the factory, the filter usedshould be of same type and size as those furnished from or rec-ommended by the factory. Pleated media or extended surfacefilter should not be used since the high air pressure drop en-countered with these type of filters is not compatible with thetype of fan coil unit covered in the manual. A maintenance schedule for permanent filters should be de-veloped in the same manner as throwaway filters. Unlikethrowaway filters, permanent filters may be cleaned and rein-stalled in the unit instead of being discarded when dirty. Theoptional factory permanent filter may be cleaned in hot soapywater to remove any trapped dirt the set aside on edge to dry. Before replacing the filter in the unit, it should be rechargedwith some type of entrapment film. The filter should besprayed on both sides or submerged in the film to assure com-plete coverage. The filter should not be allowed to soak in thefilm but should be immediately removed and the excess filmdrained from the filter before reinstallation in the unit. NOTE: Permanent filters normally have less static pressureloss than throwaway filters. Drain — The drain must be checked before initial start-upand at the beginning of each cooling season to assure that thedrain trap and line are clear. If it is clogged, take steps to clear the debris so that condensate will flow easily. Make periodic checks of the drain during the cooling seasonto maintain a free flowing condensate. Units provided with sec- ondary or tell-tale drain connection will indicate a clogged main line by flow from the tell-tale connection. NOTE: Should the growth of algae and/or bacteria be a con- cern, consult an air conditioning and refrigeration supply orga- nization familiar with local conditions for chemical or othersolution available to control these growths. Warranty — All equipment and components sold throughthe Parts Department are warranted under the same conditionsas the standard manufacturer’s warranty with the exceptionthat the warranty period is thirty (30) days unless the compo-nent is furnished as a warranty replacement. Parts furnished aswarranty replacements are warranted for the remaining term ofthe original unit warranty or not less than thirty (30) days. 83 APPENDIX A — POTENTIOMETER ADJUSTMENT Adjusting the low, medium, and high potentiometers re-quires the use of a multi-meter capable of measuring 0~5 vdc. 1. Only trained and qualified individuals should attempt toadjust or service components on any electrical compo-nent. Failure to follow safety rules could result in electri-cal shock or hazard. 2. Unit must be powered to perform the following proce-dure. If main power is not available, connecting a tempo-rary 24V-40VA power supply to parallel with a secondaryoutputs of the unit’s transformer is recommended. 3. Set the electrical multi-meter to volts direct current (vdc)on the 0~5 or 0~20 vdc scale. 4. Attach black (negative) lead of meter to the DC commonterminal, labeled “L2” above the potentiometer and to theleft of the orange relay. 5. Attach the red (positive) lead of the meter to the red wirethat bridges the 0-10 vdc outputs: high, medium, and low. 6. High Speed: Close high speed relay by applying 24-v tothe high terminal. Using a small screwdriver turn theVR3 potentiometer so the meter measures 4.51 vdc. Thiswill set the ECM speed to 90% of maximum for highspeed. Open the high speed relay. 7. Medium Speed: close medium speed relay by applying24-v to the medium terminal. Using a small screwdriverturn the VR2 potentiometer so the meter measures3.53 vdc. This will set the ECM speed to 70% of maxi-mum for medium speed. Open the medium speed relay. 8. Low Speed: Close low speed relay by applying 24-v tothe low terminal. Using a small screwdriver turn the VR1potentiometer so the meter measures 2.06 vdc. This willset the ECM speed to 40% of maximum speed for lowspeed operation. Open the low speed relay. 84 APPENDIX B — EVO/ECM 4-SPEED ADJUSTMENT Adjusting the Flo1, Flo2, Flo3 potentiometers requires theuse of a multi-meter capable of measuring 0~5 vdc. 1. Only trained and qualified individuals should attempt toadjust or service components on any electrical compo-nent. Failure to follow safety rules could result in electri-cal shock or hazard. 2. 24 vac power must be supplied to ECM board to makeadjustments. 3. Set the electrical multi-meter to volts direct current (vdc)on the 0~5 or 0~20 vdc scale. 4. Attach black (negative) lead of meter to the “Com” termi-nal to the left of the potentiometers and below the statuslight. 5. Attach the red (positive) lead of the meter to the highspeed “Flo1” terminal below the potentiometer. 6. High Speed: Using a small screwdriver turn the Flo1 po-tentiometer so the meter measures 4.51 vdc. This will setthe ECM speed to 90% of maximum for high speed oper-ation. 7. Medium Speed: Using a small screwdriver turn the Flo2potentiometer so the meter measures 3.53 vdc. This willset the ECM speed to 70% of maximum speed for medi-um speed operation. 8. Low Speed: Using a small screwdriver turn the Flo3 po-tentiometer so the meter measures 2.06 vdc. This will setthe ECM speed to 40% of maximum speed for low speedoperation. 9. For setting of Flo0 and Flo4 contact Carrier, otherwisethese potentionmeters should be set to full counter-clock-wise rotation. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420010-01 Printed in U.S.A. Form 42-5SI Pg 86 1-14 Replaces: 42-4SI © Carrier Corporation 2014 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420010-01 Printed in U.S.A. Form 42-5SI CL-1 1-14 Replaces: 42-4SI START-UP CHECKLIST FOR 42C,D,S,V SERIES FAN COIL AIR CONDITIONERS I. Project Information Job Name _______________________________________________________________________ Address ________________________________________________________________________ City ______________________________________________State __________ Zip __________ Installing Contractor _______________________________________________________________ Sales Office _____________________________________________________________________ Start-up Performed By _____________________________________________________________ INSPECTION, INSTALLATION, AND START-UP CHECKLIST ITEM COMPLETE ITEM COMPLETE Receiving & Inspection Electrical Connections 1. Unit received undamaged 35. Refer to unit wiring diagram 2. Unit received complete as ordered 36. Connection incoming power service(s) 3. “Furnish only” parts accounted for 37. Install and connect “furnish only” parts 4. Unit arrangement/hand correct 38. All field wiring in code compliance 5. Unit structural support complete and correct Unit Start-Up Handling & Installation 39. General visual unit and system inspection 6. Mounting grommets/isolators used 40. Check for proper fan rotation 7. Unit mounted level and square 41. Record electrical supply voltage 8. Proper access provided for unit and accessories 42. Record ambient temperatures 9. Proper electrical service provided 43. Check all wiring for secure connections 10. Proper overcurrent protection provided 44. Close all unit isolation valves 11. Proper service switch/disconnect provided 45. Flush water systems 12. Proper chilled water line size to unit 46. Fill systems with water/refrigerant 13. Proper hot water line size to unit 47. Vent water systems as required 14. Proper refrigerant line sizes to unit 48. All ductwork and grilles in place 15. Proper steam line sizes to unit 49. All unit panels and filters in place 16. Proper steam condensate trap on return line 50. Start fans, pumps, chillers, etc. 17. Proper steam supply pressure to unit (10 psi max) 51. Check for overload condition of all units 18. All service to unit in code compliance 52. Check all ductwork and units for air leaks 19. All shipping screws and braces removed 53. Balance air systems as required 20. Unit protected from dirt and foreign matter 54. Record all final settings for future use Cooling/Heating Connections 55. Check piping and ductwork for vibration 21. Protect valve package components from heat 56. Check all dampers for proper operation 22. Mount valve packages 57. Verify proper cooling operation 23. Connect field piping to unit 58. Verify proper heating operation 24. Pressure test all piping for leaks 59. Reinstall all covers and access panels 25. Install drain line and traps as required 60. Verify proper condensate drainage 26. Insulate all piping as required 27. Install drip lip under piping as required 28. Connect risers from 42SGM to 42SGS models 29. Connect risers to unit coil valve package (if risers are shipped/installed separately) Ductwork Connections 30. Install ductwork, fittings, and grilles as required 31. Flexible duct connections at unit 32. Proper supply and return grille type and size used 33. Control outside air for freeze protection 34. Insulate all ductwork as required Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420010-01 Printed in U.S.A. Form 42-5SI CL-2 1-14 Replaces: 42-4SI © Carrier Corporation 2014 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE42 Series Fan Coil Air Conditioner Maintenance Data LogNOTE: Indicate repairs made, refrigerant added or removed (include amounts), field controls and valve packages added.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________MODEL NUMBERSERIAL NUMBERQTY FAN AND MOTORFILTERTYPECOOLING HEATINGRH LH CFM ESP WATTSEATdb/wb°FEWT°FGPMPDH2OTOTALBTUHSENSIBLEBTUHEATdb/wb°FEWT°FGPMPDH2OSTEAMPSIBTUH kW VOLTAGE