HomeMy WebLinkAboutB16-0321_M0.0_1513629521.pdf12/18/17
12/18/17
ADD ALTERNATES
ADD ALT. #1 - BATH EXHAUST FANS
PROVIDE ADD ALTERNATE PRICING TO REPLACE ALL OF THE EXISTING BATH EXHAUST FANS WITH NEW
PANASONIC BATH FANS, TAG (N) EF-2.
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Mechanical Specifications
General
1. Immediately notify the Engineer of any discrepancies.
2. It shall be assumed that all subcontractors are experienced and thoroughly knowledgeable in their respective areas of the construction industry and
shall perform in a responsible manner in an appropriate construction sequence.
3. Do not scale drawings. Verify dimensions in field prior to commencement of work.
4. It is the intent of these drawings and specifications to establish a standard of quality. The Engineer reserves the right to take exceptions to approve
methods and materials not reflected herein.
5. Failure to order, or release order, for materials and/or equipment will not be accepted as a reason to substitute alternate materials, equipment, or
installation methods.
6. Work shall be performed in a workmanlike manner to the satisfaction of the Architect & the Engineer.
7. Labor, materials, and equipment shall conform to the latest applicable editions of local, State of Colorado, and National Codes and ordinances. If
conflict between those publications exists, the most stringent requirement shall apply.
8. Provide record drawings to architect. Drawings shall include all addendum items, change orders, alterations, re-routings, etc.
9. The drawings show the intent of the mechanical systems but do not show all details required. It is the responsibility of the Contractors to install
complete & operable systems, which conform to the manufacturers' installations instructions & industry standards.
10. Systems shall be tested for proper operation. If tests show work is defective, Contractor shall make corrections necessary at no cost to Owner.
11. It is the Contractors' and manufacturers' responsibility to assure themselves that the code authorities will approve any product to be installed on the
project.
12. Provide necessary trenching, backfill, excavation, supports, piping, insulation, saw cutting and patching, concrete/paving, etc., as required.
Backfill trenches in 6” layers and to 90% compaction and patch to match existing grade.
13. Systems shall be professionally labeled. Piping shall be labeled with color coded commercial grade labels indicating piping service and flow
direction. Equipment, fans, pumps, valves, switches and controls shall be labeled with engraved plastic or metal tags and an equipment/valve
schedule shall be provided and mounted on the mechanical room wall. Equipment labels shall follow the same nomenclature as the mechanical
drawings.
14. Mechanical Contractor to make final connections to kitchen equipment.
15. See architectural reflected ceiling plan for all ceiling penetrations.
16. Coordinate architectural, structural, electrical, landscaping, fire protection, and interior design drawings with mechanical drawings prior to
installation.
17. Offset piping, ductwork, etc. as necessary to accommodate structure, beams, columns, and existing equipment.
18. Verify exact locations of existing and new underground utilities, piping, and raceway systems prior to trenching. Contractor shall obtain and
verify exact utility company drawings and requirements.
Electrical
19. Contractor must carefully verify electrical service voltage and phase available before ordering any equipment.
20. The following are to be furnished by MC and wired by EC: equipment motors, magnetic starters, line voltage thermostats, factory disconnect
switches (if specified as part of factory wired equipment) resistance heaters, fire and smoke detectors.
21. The following are to be furnished and wired by EC: disconnect switches, thermal overload switches, manual operating switches and contactors.
22. The following are to be furnished and wired by MC: low voltage thermostats, control transformers, control relays, control panels, motorized
valves, motorized dampers, pilot lights, multi-speed switches and interlocks.
Shop Drawings
23.Submit entire HVAC shop drawing submittal data at one time. Submittal to be bound in three-ring binders, indexed in a neat and orderly manner.
Partial submittals will not be accepted. Submittals shall include, but not be limited to: equipment, fixtures, insulation, diffusers, pumps, fans,
piping, and valves.
24. Provide with shop drawing submittal, 1/4" scale layout drawings of rooms with mechanical equipment, piping and ductwork. Layouts shall show
locations of mechanical systems and shall be coordinated with plumbing, fire protection, and electrical systems. Equipment shall be drawn to
scale.
Remodel, Demolition & Unforeseen Conditions
25. Visit site prior to bid and verify the conditions. Include in the bid, costs required to make work meet existing conditions, whether indicated or not.
26. Provide mechanical demolition required. Refer to architectural demolition drawings for location and extent of demolition required. Visit site prior
to bid to determine extent of work involved. Provide labor and materials as required to maintain and/or restore continuity of service to existing
systems.
27. In as much as design for remodel, renovation and/or rehabilitation requires that certain assumptions be made regarding existing conditions and
because some of these assumptions cannot be verified without destroying otherwise adequate or serviceable portions of the building, the Engineer
cannot assure the Owner or the Contractor that the professional consulting services herein encompass all contingencies. Field coordination during
construction is imperative. Contractors bidding this work must make reasonable allowances for unseen conditions and should include associated
allowances in their bids noted as such.
28. Field verify locations of all existing piping, equipment, ductwork, etc.
29. All ductwork, diffusers, and equipment shown on this plan are new, except where noted.
30. All new ductwork, piping, equipment, etc. is shown with dark lineweight. All existing ductwork, piping, equipment, etc. is shown with light
lineweight.
31. All removed piping, ductwork, equipment, etc. are to be disposed of by Contractor unless noted otherwise.
32. All existing support rods and straps now supporting ducts, pipes, air tubing, electrical conduit, etc. that are removed to allow room for installation
of new equipment shall be relocated and reinstalled, or replaced if damaged.
33. Cap all demolished and abandoned duct take-offs at trunk duct.
34. Extend and modify existing fire protection systems to new and remodeled areas.
35. New hot and cold water branches to be routed from nearest hot water and cold water of line size equal to or greater than new branch - typical.
Insulation
36. Insulate all new refrigerant suction piping & condensate piping with flexible, closed-cell elastomeric insulation, 1” thick. Insulation shall have a
flame spread index of not more than 25 and a smoke-developed index of not more than 50 when test in accordance with ASTM E 84, latest
revision.
37. Elastomeric insulation: Slip insulation over pipe before assembly so that there are no length wide seams. Where lengths of insulation are butted
together, use factory recommended adhesive. Glue the butt ends of insulation to each other to form a homogenous membrane maintaining the
vapor barrier. Exterior elastomeric insulation shall be installed with the longitudinal seam on the bottom of the pipe and shall be protected with an
ultra violet resistive paint. Elastomeric insulation shall be covered with two coats of paint manufactured specifically for covering Elastomeric
insulation, Armaflex WB Finish or equal.
38. Insulate all new heating water, domestic hot water, domestic hot water recirculation, radiant floor (mains and runouts to areas being heated) and
snowmelt piping (mains and runouts to areas being heated) with flexible, closed-cell elastomeric insulation. Insulation shall have a flame spread
index of less than 25 and a smoke-developed index of less than 50 when test in accordance with ASTM E 84, latest revision. Minimum R-Value of
3.0 for all piping. Insulation shall have a maximum water vapor transmission of 0.08 perm-inches when tested in accordance with ASTM E 96.
Procedure A, latest revision.
39. Insulation shall be installed under all radiant heated floors on slab. Insulation shall have a minimum R-value of 10 at a mean testing temperature
of 75 F.
40. Insulation shall be installed under all exterior snowmelt areas. Insulation shall be Dow Styrofoam Highload extruded polystyrene foam board
insulation that has an R-5 per inch insulation value, and 2" thick. Insulation installed under traffic areas must be traffic rated.
41. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall be supported with vibration clamps.
42. Snowmelt piping exposed outdoors shall be insulated with U.L. approved, white, all service, glass fiber, snap-on, 1” thick, pipe insulation.
Insulate fittings with glass fiber blanket insulation. Cover outdoor piping and insulation with aluminum jacket. The jacket shall be held in place by
a continuous friction type joint, providing a positive weather seal over the entire length of jacket. The circumferential joints shall be secured with
preformed aluminum jackets, two-piece elbows, and flange covers, secured with steel bands.
43. All buried heating water and snowmelt piping shall be either A) Pre-insulated PEX piping, Urecon or equivalent or B) Insulated with Armaflex or
equivalent and run inside a watertight conduit.
44. Internally line all new ductwork inside the thermal envelope (unless noted otherwise) with 1/2” thick, 2.0 PCF, U.L. rated, glass fiber insulation
with a continuous vapor barrier.
45. Insulate the final 5' of all exhaust ductwork at exterior terminations with 2” thick insulation with a continuous vapor barrier. Minimum R-Value of
6.0.
Piping
46. Domestic Hot, Cold & Recirculation piping inside building - Buried lines type 'K' copper water tube, wrought copper fittings and 1100F solder.
Non-buried lines, type 'L' copper water tube, wrought copper fittings and no lead solder. Provide alternate pricing for PEX tubing (no oxygen
diffusion barrier necessary). Unless otherwise noted, piping on plans has been sized for copper, and if ASTM PEX piping is used, increase size of
piping one nominal size from size shown on plans, ie. Plans call for a ¾” line & PEX is to be substituted, a 1” PEX line shall be installed.
47. Waste & Vent piping inside building:
Waste lines above ground - Standard weight, C.I. soil pipe, and fittings, or hubless, C.I. soil pipe and fittings. Up through 2-1/2" may be standard
weight, galvanized steel pipe with black, C.I. drainage fittings.
Waste lines below grade and all Vent lines for residential may be Schedule 40 ABS-DWV plastic pipe and fittings (ASTM D2661) or Schedule 40
PVC-DWV plastic pipe and fittings (ASTM D2665). All pipe and fittings shall bear NFS-DWV mark and shall be joined with solvent weld joints
as recommended by the manufacturer.
Pressurized waste piping shall be Schedule 40 PVC-DWV plastic pipe and fittings (ASTM D2665).
48. Heating Water piping - Piping may be type 'K' copper for all buried lines using wrought copper fittings and 1100F solder. For non-buried piping,
type 'L' copper, wrought copper fittings, and no lead solder. All buried pipe shall be surrounded with 4" of clean sand. Provide alternate price for
PEX tubing (with oxygen diffusion barrier). Unless otherwise noted, piping on plans has been sized for copper, and if PEX piping is used,
increase size of piping one nominal size from size shown on plans. ie. Plans call for ¾” piping & PEX is to be substituted, a 1” PEX line shall be
installed.
49. PEX piping shall be supported by continuous cradles supplied by the manufacturer.
50. Drain Pan piping - Drain pan piping may be PEX or Schedule 40 ABS-DWV plastic pipe and fittings (ASTM D2661) or Schedule 40 PVC-DWV
plastic pipe and fittings (ASTM D2665).
51. Refrigeration Piping - Type 'L', ACR Grade copper, cleaned, dehydrated, capped and charged with clean nitrogen at the factory. Use wrought
copper fittings and hard solder having a minimum melting point of 1100F for buried lines, no lead solder for non-buried lines. Valves and
specialties shall be standard brass or bronze valves for refrigeration service. Buried pipe shall be surrounded by 4” clean sand.
52. Gas Piping - Schedule 40 black steel pipe, 150 lb. malleable iron screwed fittings on above ground pipe, welded fittings with all piping coated and
wrapped on buried pipe. Welded gas piping shall be pressure tested at a minimum of 60 psi per Town of Vail amendment to the 2015 IFGC,
section 406.4.1. CSST pipe is prohibited entirely.
53. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
54. Copper pipe Valves and Specialties:
Gate Valves: Bronze, Class 125, 200 lb. W.O.G.
Ball Valves: Bronze, Class 125, 200 lb. W.O.G.
Check Valves: Bronze, Class 125, 200 lb. W.O.G.
Balancing Valves: 125 psig w.p. for 250F service tight shut-off, Illinois dual-purpose, balancing/shut-off valve, Hoffman, Sarco, or equivalent.
55. Support pipe with rod and clevis or clamps. No pipe tape allowed.
56. The piping material shall be cast iron at all pipe penetrations of fire-rated assemblies above the crawlspace.
57. Provide expansion joints or loops on all heating water piping runs in excess of 50'.
58. Dielectric Unions - Furnish and install a dielectric union at all connections where non-ferrous material is in contact with ferrous material and fluid
is not protected with corrosion inhibitors.
59. Grade and valve all heating water piping with ¾” hose end valves to permit drainage of the system. Vent all high points in equipment rooms as
necessary with automatic air vents piped to convenient drain. All high points in system outside of equipment rooms with manual air vents as
required to relieve air in the system.
60. Provide plastic grommets on all heating water piping passing through wood joists and studs.
61. Install plumbing clean-outs as required by applicable codes.
Boiler Flue & Combustion Air Piping
62. Boiler flue piping shall be CPVC, complying with ASTM F441 or a polypropylene venting system, listed in accordance with ULC-S636, and rated
for flue gas venting systems. Flue shall be Centrotherm Innoflue, Duravent PolyPro or equal.
63. Boiler combustion air piping shall be PVC, complying with ASTM D1785.
Antifreeze Solutions
64. DILUTION WATER QUALITY: Contractor shall be responsible for testing the water and submitting a report to the Owner & Engineer, prior to
system fill. "Hard" water shall not be used. The water used to dilute the concentrated inhibited glycol-based heat transfer fluid must be either
distilled, deionized, or contain less than 25 ppm of chloride, 25 ppm of sulfate, 50 ppm of calcium, and 50 ppm of magnesium, with a total
hardness not to exceed 100 ppm. If good quality water is unavailable, the manufacturer of the glycol product will provide the heat transfer fluid
and water to meet the specifications of the system.
65. Fill heating water system with 30% propylene glycol / 70% water solution, by volume, for freeze protection to 8°F and burst protection to -20°F.
Include corrosion inhibitors.
66. Fill snowmelt system with 50% propylene glycol / 50% water solution, by volume, for freeze protection to -28°F and burst protection to -60°F.
Include corrosion inhibitors.
Ductwork
67. Duct sizes shown on drawings are outside (sheet metal) duct dimensions.
68. All ductwork shall be sealed airtight with duct mastic. Duct tape is prohibited.
69. All returns shall be ducted. Panning of stud cavities, joist bays, etc. is not allowed.
70. Provide 1/4" galvanized mesh screen on all combustion air ducts or openings.
71. Seal all ductwork joints and vapor barrier penetrations at all exterior walls.
72. Ducts and piping penetrating through roof shall have roof flashing with caulk type counter flashing sleeve or by method acceptable by roofing
manufacturer. Installation shall be watertight.
73. Provide backdraft dampers at any and all ductwork penetrations through exterior wall (except outside air and combustion air ductwork).
74. Provide turning vanes in all mitered rectangular elbows.
75. Provide cable operated volume dampers at all supply duct take-offs.
76. Make all final connections to supply GRD's with acoustic flexible duct. Maximum length shall be 2 feet.
77. All ductwork or surfaces which are visible behind a grille, register, diffuser or louver shall be painted flat black.
78. All dryer vents and bathroom exhaust ducts from fan/light fixtures shall be 4” galvanized round (unless noted otherwise).
79. Sheet metal and fittings to be pursuant to SMACNA and ASHRAE standards.
80. All ducts shall be 26 gauge minimum. Duct gauge and construction shall conform to SMACNA HVAC Duct Construction Standards.
81. Contractor to coordinate exact location of grilles and registers before installation.
82. Seal off all ducts during construction.
Vibration Isolation
83. Where specified, duct-to-fan connections shall be made with flexible canvas duct connector material. Provide duct alignment within 1/2" at the
fan collar and duct collar.
84. Where specified, spring vibration isolators for support of equipment shall be properly aligned so that support rod does not contact spring housing.
Controls
85. Mount all thermostats and humidistats 5'-0" above finished floor.
86. Thermostats & remote temperature sensors shall not be installed above heat emitting equipment, including wall mounted touch screen controls.
Do not mount on exterior walls or above/below forced air supply registers.
87. All thermostats shall have a temperature range suitable for the application and have adjustable set points. The thermostats shall be able to display
temperature setpoint and room temperature. All thermostats shall be approved by the Owner.
88. Install emergency power off (EPO) switch inside mechanical rooms containing boilers. Switch plate shall be red in color and labeled “GAS
BURNER EMERGENCY SWITCH”. Switch shall be compliant with Section 1006.8 of the 2015 IMC. Refer to electrical drawings for additional
information.
89. See Sequence of Operation for additional control information.
Balancing
90. Air and water flows must be balanced, and drive systems adjusted as required. Balance Contractor shall furnish subsequent air balances after
acceptance of the building.
91. Submit a written balance report. Balancing procedures shall be in accordance with NEBB or AABC guidelines for proportional balance. Submit
report on standard NEBB forms.
92. Airside measurements shall include all motor amperage, voltage readings, fan RPM, fan CFM, fan inlet static pressure, fan outlet static pressure,
and inlet and outlet grille CFM.
93. Adjust flows to within 10% of required quantity. If actual quantity is less than 90% of design, investigate cause, attempt to rectify and notify
Engineer. Submittal of balance report with less than required flows without explanation is cause for rejection of report.
94. Submit three copies of all submittals in addition to any required by the Contractor. These copies shall be retained by the Owner, Contractor and
Engineer.
Radiant Floor Heating
95. Radiant tubing shall be 1/2" nominal diameter for in-slab and "staple-up" installations. Tubing shall be PEX-a crosslinked polyethylene with an
oxygen diffusion barrier, manufactured by the Engle method.
96. Piping shall be installed in continuous loops, no splices allowed. Tube centers and the maximum loop lengths are specified in the Radiant Zone
Schedule on the plans.
97. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
98. “Staple-up” radiant tubing shall be installed between the floor joists on 8" centers. PEX clips or rails shall support the tubing and shall be installed
on 5' maximum centers. Tube shall be installed to eliminate expansion and contraction "ticking".
99. The Contractor shall install manifolds as provided by the tubing manufacturer. The manifolds shall consist of a return header (including:
balancing valve for each loop, compression fitting to receive tubes and air vent) and supply header (including: manual shut-off valve for each loop
and compression fitting to receive tubes).
100. QUIK TRAK: Radiant floor tubing shall be 5/16" nominal diameter, Uponor Wirsbo hePEX or equal. Tubing shall be installed in Uponor
Wirsbo Quik Trak panels, installed over wood subfloor. After the panels are laid, vacuum the debris from the panel grooves. Next, apply a thin
(1/8") bead of Wirsbo Quik Trak Sealant throughout the length of the groove. The sealant is 100% silicone and acts as an adhesive and promotes
good heat transfer from the tubing to the panel.
Snowmelt
101. Snowmelt tubing shall be 5/8" nominal diameter. Tubing shall be PEX-a crosslinked polyethylene with an oxygen diffusion barrier,
manufactured by the Engle method in accordance with ASTM F 876.
102. Piping shall be installed in continuous loops, no splices allowed. Tube centers and the maximum loop lengths are specified in the Snowmelt
Zone Schedule on the plans.
103. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
104. The Contractor shall install manifolds as provided by the tubing manufacturer. The manifolds shall consist of a return header (including:
balancing valve for each loop, compression fitting to receive tubes and air vent) and supply header (including: manual shut-off valve for each loop
and compression fitting to receive tubes).
105. Snowmelt distribution piping shall be sized per plans. Piping shall be Metric dimensioned PEX-a crosslinked polyethylene with an oxygen
diffusion barrier, manufactured by the Engle method in accordance with German DIN 4726.
106. Secure piping in snowmelt areas by attaching tubing to wire mesh using plastic tie straps, every 3' on straight runs and at apex of turn for any
change of direction. No metal wiring shall be used.
107. Snowmelt system shall be pressure tested in accordance with tubing manufacturer's instructions as required for warranty protection. In the
absence of manufacturer's instruction, pressurize the entire snowmelt system with compressed air. Charge system to a pressure of not less than 80
psig or more than 100 psig. Pressure test shall last for 24 hours with not less than a 2 psig drop. With system air charged, soap test all joint on and
within the manifolds. After hydrostatic test pressure has been applied, examine piping, joints and connections for leakage. Eliminate any leaks as
necessary & re-test. Any portion of tubing layout that rises as a result of being pressurized shall be re-secured to be at the proper level within the
slab structure when poured.
108. Entire snowmelt system shall be left pressurized with monitoring pressure gauge throughout installation of concrete or sand/pavers. Continually
monitor pressure on system to make certain tubing system remains intact with no leaks or punctures.
109. Manifolds shall be tagged to identify area served. Each connection on supply & return manifolds shall be permanently labeled with loop number.
110. Prior to final system fill and commissioning, the PEX tubing system and manifolds shall be chemically cleaned as prescribed by the tubing
manufacturer. Supply all tools, connections, labor, and accessories necessary to properly remove all foreign material, chemical, and residue within
the tubing system before permanently charging system and placing into operation.
111. After entire system has been properly cleaned and flushed, fill system with clean water to proper cold fill pressure. Add propylene glycol to the
snowmelt system to the concentration specified using a positive displacement pump. Antifreeze fluid shall include corrosion inhibitors. Purge
each individual loop to eliminate air pockets in the system. After purging remove fill connection to any potable water lines to prevent any
possibility of contamination.
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Sequence of Operation
1. Thermostats
a. See sheet M0.1 to determine which stats perform which functions. Thermostats shall be programmable type and approved
by owner.
b. Line voltage thermostats shall be provided by mechanical contractor and wired by electrical contractor.
2. (N) B-1 Boiler
a. Boiler shall be modulated by integral controls to maintain heating water setpoint at temperature sensor TS-1.
b. Heating water temperature shall be reset based on outdoor air temperatures (180°F @ -20°F to 90°F @ 70°F, adj).
c. HWS setpoint shall be ramped up to 180°F (adj) on any call for domestic hot water heating.
c. HWS setpoint shall be ramped up to 160°F (adj) on a call for snowmelting.
d. P-1 boiler pump shall run whenever boiler is called to fire.
2. (N) WH-1 Side-ArmWater Heater
a. Upon a call for water heating from temperature sensor TS-2 at WH-1, P-3 water heater pump shall start and boiler shall be
enabled.
b. (N) RP-1 domestic hot water recirculation pump shall be controlled automatically.
3. (N) WH-2 Electric Water Heaters
a. Upon a call for water heating at integral temperature sensor at WH-2, electric element shall be enabled to maintain tank
temperature.
b. WH-2 setpoint shall be about 5°F lower than WH-1 setpoint.
c. DHW from WH-1 shall be piped to inlet of WH-2.
4. Staple-Up Radiant Floor Heating
a. Upon a call for heating, heating water pump P-3 shall run.
5. In-Slab & Quik Trak Radiant Floor Heating
a. Upon a call for heating, associated zone valve shall open, heating water pump P-4 will already be operating (see "Pumps"
sequence for additional information on P-4).
b. Provide (1) Tekmar 360 mixing control. Tekmar control shall reset MV-1 mixing valve position based on OSA
temperatures (135°F @ -20°F to 90°F @ 70°F, adj) to maintain HWS setpoint at TS-3 temperature sensor.
6. FC-1 Fan Coil
a. COOLING: Upon a call for cooling, FC-1 fan shall start and HP-1 heat pump shall start.
b. HEATING: Upon a call for heating, FC-1 fan shall start and HP-1 heat pump shall start.
c. HUMIDIFICATION: See humidification sequence.
7. (N) H-2 Humidifier
a. Upon a call for humidification from wall mounted humidistat, associated fan shall start and once airflow is proven by air
proving switch, humidifier shall start.
b. Include a high limit duct humidistat located in the supply air duct, downstream of the steam absorption zone, to disable
humidifier if RH exceeds 80% (adj).
c. Include an automatic humidifier control from humidifier manufacturer, which shall automatically reset the humidity
setpoint based on outdoor temperature. Outdoor reset curve shall be adjustable. Include outdoor air temperature sensor.
d. Humidification shall be disabled during calls for cooling.
8. Steam Generator
a. SGU-1 steam generator shall be controlled by integral ThermaSol controls.
9. Fans
a. (N) DBF-1 dryer booster fan shall be controlled by an integral pressure sensing switch which recognizes dryer operation
and activates booster fan from an independent electrical circuit. The integral delay-on-make timer in the switch will cycle
the fan on for intervals of 10 minutes. This will continue until the dryer has stopped and the timer delay period has lapsed.
b. (N) EF-1 mechanical room exhaust fan shall be controlled by a line voltage cooling thermostat.
c. (N) EF-2 bath exhaust fans shall each be controlled by an on/off wall switch.
10.Snowmelting
a. Provide (1) snow/ice sensor and socket (Tekmar 091/094). Refer to M0.1 for location.
b. Provide (1) Tekmar 670 snowmelt control with variable speed injection pumping.
c. Upon a call for snowmelting from snow/ice sensor, P-6 snowmelt pump and P-5 heat exchanger pump shall start, and
boiler shall be enabled. Tekmar control shall modulate speed of P-5 to maintain snowmelt water supply setpoint at TS-4
temperature sensor. Setpoint shall be 120°F (adj).
d. Provide a 12-hour timer switch in the mechanical room for manual override.
e. Tekmar system shall be setup for WWSD (warm weather shut down) at approximately 45°F (adj). System shall not operate
if outdoor temperature is above this setting.
f. Tekmar system shall be setup for CWCO (cold weather cut out) at approximately 10°F (adj). System shall not operate if
outdoor temperature is below this setting.
11. Pumps
a. P-1 (N) B-1 boiler pump: on whenever boiler is called to run.
b. P-2 (N) WH-1 water heater pump: on whenever there is a call for water heating from TS-2 temperature sensor.
c. P-3 staple-up radiant heating pump: on whenever there is a call for heating from a staple-up radiant zone.
d. P-4 in-slab and Quik Trak radiant heating pump: controlled automatically, set pump to AUTOADAPT mode.
e. P-5 HX-1 heat exchanger pump: on whenever there is a call for snowmelting.
f. P-6 snowmelt pump: on whenever there is a call for snowmelting.
g. RP-1 DHW recirculation pump: controlled automatically.
12. LS-1 Lift Station
a. Lift station shall be controlled by duplex control panel.
b. When the "stop" and "lead" floats are closed pump 1 will start and the pump 1 run light will illuminate. Pump 1 will
remain operational until the "stop" float opens.
c. The next time the "stop" and "lead" floats are closed the alternating circuit will energize pump 2 and the pump 2 run light
will illuminate. Pump 2 will remain operational until the "stop" float opens. This cycle will repeat each time the fluid
level rises and falls.
d. If the fluid level continues to rise after the first pump has been energized the "lag" float will close. When the "lag" float
has closed the second pump will energize. Both pumps will remain operational until the "stop" float opens and the
following will occur:
- The audible high water horn will sound.
- The auxiliary dry contacts will close. A signal shall be sent to the owner.
13. SP-1 Sump Pump
a. Sump pump shall each be controlled by simplex control panel.
b. Sump pump shall be equipped with an oil guard system to automatically shut the pump down if oil is sensed. A light will
illuminate if oil is sensed.
c. When the "stop" and "start" floats are closed the pump will start and the pump run light will illuminate. The pump will
remain operational until the "stop" float opens.
d. In the event the liquid level continues to rise, the "alarm" float will be closed. When the "alarm" float is closed the
following will also occur:
- The external high water light will illuminate.
- The audible high water alarm will sound.
- The auxiliary dry contacts will close. A signal shall be sent to the owner.
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