HomeMy WebLinkAboutB17-0081_M4.0 BDR_1494884400.pdfGeneral
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.
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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.
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15. Mechanical Contractor to make final connections to kitchen equipment.
16. See architectural reflected ceiling plan for all ceiling penetrations.
17. Coordinate architectural, structural, electrical, landscaping, fire protection, and interior design drawings with mechanical drawings prior to
installation.
18. Offset piping, ductwork, etc. as necessary to accommodate structure, beams, columns, and existing equipment.
19. 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
20. Contractor must carefully verify electrical service voltage and phase available before ordering any equipment.
21. 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.
22. The following are to be furnished and wired by EC: disconnect switches, thermal overload switches, manual operating switches and
contactors.
23. 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
24. 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, valves, boilers, and fan coils.
25. 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.
Insulation
26. Piping Insulation Schedule:
Service Thickness (in.)
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+:65 ´ SLSH DQG JUHDWHU 1.0
Domestic Hot Water 1.0
Domestic Cold Water 0.5
Domestic Hot Water Recirculation 1.0
Refrigerant Suction 0.5
Refrigerant Liquid 0.5
Condensate Drain 0.5
Piping insulation shall be U.L. approved, white, all service, glass fiber, snap-on, pipe insulation. Insulate fittings with glass fiber blanket
insulation and premolded PVC covers. Provide submittal.
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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.
28. 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.
29. 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.
30. 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.
31. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall be supported with vibration clamps.
32. Snowmelt distribution piping buried outside shall be insulated with 2" flexible, closed-cell elastomeric insulation, AP Armaflex or equal.
Product must meet requirements of ASTM C 534. Insulation shall have a maximum thermal conductivity of 0.27 Btu-in/h-ft2F at 75 F
mean temperature. Buried insulation shall be wrapped in a waterproof tape, e.g. Densotape or approved equal.
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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.
34. All buried 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.
35. Internally line all new RECTANGULAR Exhaust Air (EA), Return Air (RA), & Supply Air (SA) ductwork with 1/2" thick, 2.0 PCF, U.L.
rated, non-corrosive, non-combustible, glass fiber insulation complying with ASTM C 1071. Refer to plans for duct labels. Liner fasteners
shall be galvanized steel, welded with integral head.
36. All new Outside Air (OA) ductwork shall be unlined. Refer to plans for duct labels.
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blanket insulation complying with ASTM C 553. Vapor barrier jacket shall be FSK (foil-scrim-kraft). Minimum R-Value of 6.0.
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R-Value of 6.0.
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Piping
40. 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
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line shall be installed.
41. Water service pipe outside building - Polyethylene (PE) plastic pipe (ASTM D2239) or tubing (ASTM D2737) and fittings (ASTM D2609)
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pressure.
42. 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.
43. 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
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44. PEX piping shall be supported by continuous cradles supplied by the manufacturer.
45. Snowmelt distribution piping buried underground outdoors shall be sized per plans and shall be PEX-a crosslinked polyethylene with an
oxygen diffusion barrier, manufactured by the Engle method.
46. Drain Pan piping - Not Buried: Type 'M' copper, wrought copper fittings, and no lead solder. - Buried: Type 'L' copper, wrought copper
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ABS-DWV plastic pipe and fittings (ASTM D2661) or Schedule 40 PVC-DWV plastic pipe and fittings (ASTM D2665).
47. Condensing Boiler Condensate shall be neutralized via a neutralization basin before discharge into building drainage system. Condensate
piping shall be PVC or other approved material suitable for pH levels of 3.
48. 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.
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49. 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
2009 IFGC, section 406.4.1. CSST pipe is permitted for final connections only.
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51. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
52. Gas Pressure Regulator (GPR) Valves - Install GPR's where specified and/or shown on plans. Include shut-off valve upstream of valve and
capped tees upstream and downstream of valve for pressure testing. For modulating condensing boilers, install a minimum of 10' of gas
piping downstream of regulator to serve as a buffer during start-up. Refer to boiler manufacturer installation instructions for additional
requirements. Install vent limiting device or vent pipe to the outside, as required.
53. 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.
54. Support pipe with rod and clevis or clamps. No pipe tape allowed.
55. Provide expansion joints or loops on all heating water piping runs in excess of 50'.
56. 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.
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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.
58. Provide plastic grommets on all heating water piping passing through wood joists and studs.
59. Install plumbing clean-outs as required by applicable codes.
Boiler Flue & Combustion Air Piping
60. Boiler flue piping shall be 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.
61. Boiler flue piping shall be CPVC, complying with ASTM F441.
62. Boiler combustion air piping shall be PVC, complying with ASTM D1785.
Antifreeze Solutions
63. 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.
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Ductwork
66. All ductwork shall be located as high as possible and up in the structure where feasible, to maximize ceiling heights.
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 volume dampers at all accessible round duct take-offs.
76. Make all final connections to supply GRD's with acoustic flexible duct. Minimum length shall be 4 feet. Maximum length shall be 8 feet.
77. All ductwork or surfaces which are visible behind a grille, register, diffuser or louver shall be painted flat black.
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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.
83. Back Draft Dampers: Furnish and install, at locations on plans or in accordance with schedules, dampers meeting the following
specifications: Dampers shall be of the two-blade design with separate axles. Blades shall be retained in closed position with tensioned
spring. Spring shall be easily field adjustable for any orientation mounting. Spring adjustment will allow for field setting of pressure to open
damper. Frame shall include rolled stiffener beads to allow easy sealing to spiral ductwork joints. Dampers shall include vinyl foam blade
seal. Frames shall have no holes or openings to allow air through damper frame. Damper shall in all respects be equivalent to Ruskin model
BDR2.
84. Motor Operated Dampers (Round): Furnish and install, at locations shown on plans or in accordance with schedules, dampers meeting the
following specifications: Dampers shall be of the butterfly type consisting of circular blade mounted to a shaft. Inside frame surface shall be
clean and smooth with no blade stops or similar inward projections. Frames shall include rolled stiffener beads to allow easy sealing of
spiral ductwork joints. Dampers shall include a firm, fine cell foam seal sandwiched between two blades. Leakage through the damper in the
closed position shall not exceed .15 scfm per inch of blade circumference at a pressure differential of 4" w.g. Leakage through the bearings
shall be less than 1/4 cfm at 4" static pressure. Damper frame and blade shall be fabricated from galvanized steel. Material thickness shall be
at least equivalent to Ruskin Manufacturing model CDRS25 standard construction.
85. Motor Operated Dampers (Rectangular): Furnish and install, at locations shown on plans, or in accordance with schedules, control dampers
that meet the following minimum construction standards. Frame shall be 16 gage (1.6) galvanized steel structural hat channel with tabbed
corners for reinforcement. The blades shall be single skin, 16 gage (1.6) galvanized steel with three logitudinal grooves for reinforcement.
Bearings shall be corrosion resistant, molded synthetic sleeve type turning in an extruded hole in the damper frame. Axles shall be square or
hexagonal positively locked into the damper blade. Linkage shall be concealed out of airstream, within the damper frame to reduce pressure
drop and noise. Submittal must include leakage, pressure drop, maximum velocity and maximum pressure data based on AMCA Publication
500. Dampers shall be in all respects equivalent to Ruskin Model CD35.
Vibration Isolation
86. 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.
87. Where specified, spring vibration isolators for support of equipment shall be properly aligned so that support rod does not contact spring
housing.
Controls
88. Mount all thermostats and humidistats 5'-0" above finished floor.
89. 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.
90. 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.
91. Freeze Detection Thermostats. Each supply system with water coils taking outside air shall have a freeze detection thermostat located on
the downstream side of the coil. Thermostats shall be of adjustable electric contact type, silver plated, manual reset with 20' flexible sensing
bulb of increment type with any section capable of actuating mechanism on temperature drop below set point, thermostat shall stop fan(s)
and close outside air damper. They shall have an isolated set of contacts for alarm system.
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additional information.
93. See Sequence of Operation for additional control information.
Balancing
94. Air and water flows must be balanced, and fan belts, pumps, and drive systems adjusted as required. Balance Contractor shall furnish
subsequent air balances after acceptance of the building.
95. 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.
96. Airside measurements shall include all motor amperage, voltage readings, motor RPM, fan RPM, fan CFM, fan inlet static pressure, fan
outlet static pressure, and inlet and outlet grille CFM.
97. Hydronic measurements shall include circuit setters, all motor amperage, voltage readings, motor RPM, pump RPM, pump GPM as
calculated from the pump curve, inlet and outlet pressures at pumps, and temperature and pressure drop at all coils.
98. 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.
99. 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
100. Radiant tubing shall be 1/2" nominal diameter. Tubing shall be PEX-a crosslinked polyethylene with an oxygen diffusion barrier,
manufactured by the Engle method.
101. 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.
102. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
103. 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).
Snowmelt
104. 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.
105. 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.
106. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
107. 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).
108. 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.
109. 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.
110. 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.
111. 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.
112. Manifolds shall be tagged to identify area served. Each connection on supply & return manifolds shall be permanently labeled with loop
number.
113. 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.
114. 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.
Mechanical Specifications
3/31/17
05/15/17