HomeMy WebLinkAboutB16-0031_M4.0_1478903280.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
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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. 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, etc.
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 and plumbing 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, and boilers.
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.
Insulation
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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.
26. 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.
27. 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 U.L. approved, white, all service, glass fiber, snap-on,
pipe insulation. Minimum R-Value of 3.0 for all piping. Insulate fittings with glass fiber blanket insulation and premolded PVC
covers. Provide deduct alternate price to insulate with Armaflex.
28. 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.
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thick. Insulation must have pressure rating suitable for application.
30. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall be supported with vibration clamps.
31. All buried heating water and snowmelt piping shall be Pre-insulated PEX piping, Urecon or equivalent.
32. DUCT LINER: 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.
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Piping
34. 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
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35. 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.
36. 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.
37. 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
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38. Snowmelt Piping (inside building) - Type 'L' copper, wrought copper fittings, and no lead solder. Provide alternate price for PEX
tubing with oxygen diffusion barrier. Piping sizes shown on plans are for copper. Increase PEX pipe size by one size if changing to
PEX.
39. Snowmelt Piping (outside of building) Pre-insulated PEX piping (Rehau, Urecon, Upono or equal). Bury minimum 4' deep and
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40. PEX piping shall be supported by continuous cradles supplied by the manufacturer.
41. Drain Pan piping - Not Buried: Type 'M' copper, wrought copper fittings, and no lead solder. - Buried: Type 'L' copper, wrought
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Schedule 40 ABS-DWV plastic pipe and fittings (ASTM D2661) or Schedule 40 PVC-DWV plastic pipe and fittings (ASTM D2665).
42. 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.
43. 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
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clean sand.
44. 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.
45. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
46. 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.
47. 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.
48. Support pipe with rod and clevis or clamps. No pipe tape allowed.
49. The piping material shall be cast iron at all pipe penetrations of fire-rated assemblies above the crawlspace.
50. Provide expansion joints or loops on all heating water piping runs in excess of 50'.
51. 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.
53. Provide plastic grommets on all heating water piping passing through wood joists and studs.
54. Install plumbing clean-outs as required by applicable codes.
Boiler Flue & Combustion Air Piping
55. 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.
56. Boiler combustion air piping shall be PVC, complying with ASTM D1785.
Antifreeze Solutions
57. 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
60. Duct sizes shown on drawings are outside (sheet metal) duct dimensions.
61. All ductwork shall be sealed airtight with duct mastic. Duct tape is prohibited.
62. All returns shall be ducted. Panning of stud cavities, joist bays, etc. is not allowed.
63. Provide 1/4" galvanized mesh screen on all combustion air ducts or openings.
64. Seal all ductwork joints and vapor barrier penetrations at all exterior walls.
65. 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.
66. Provide backdraft dampers at any and all ductwork penetrations through exterior wall (except outside air and combustion air
ductwork).
67. Provide turning vanes in all mitered rectangular elbows.
68. Provide volume dampers at all accessible round duct take-offs.
69. Make all final connections to supply GRD's with acoustic flexible duct. Minimum length shall be 4 feet. Maximum length shall be 8
feet.
70. All ductwork or surfaces which are visible behind a grille, register, diffuser or louver shall be painted flat black.
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72. Sheet metal and fittings to be pursuant to SMACNA and ASHRAE standards.
73. All ducts shall be 26 gauge minimum. Duct gauge and construction shall conform to SMACNA HVAC Duct Construction Standards.
74. Contractor to coordinate exact location of grilles and registers before installation.
75. Seal off all ducts during construction.
76. 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.
77. 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.
78. 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 longitudinal 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
79. 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.
80. Where specified, spring vibration isolators for support of equipment shall be properly aligned so that support rod does not contact
spring housing.
Controls
81. Mount all thermostats and humidistats 5'-0" above finished floor.
82. 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.
83. 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.
84. 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.
85. Smoke detectors shall be installed in return air systems with a design capacity greater than 2,000 CFM, in the return duct or plenum
upstream of any filters, exhaust air connections or outdoor air connections. Installation shall comply with NFPA 72 and Section 606
of the 2015 IMC. Upon detection of smoke, fan shall automatically shut down.
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for additional information.
87. See Sequence of Operation for additional control information.
Balancing
88. 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.
89. 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.
90. Airside measurements shall include all motor amperage, voltage readings, motor RPM, fan RPM, fan CFM, fan inlet static pressure,
fan outlet static pressure, and exhaust grille CFM.
91. 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.
92. 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.
93. 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
94. 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.
95. 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.
96. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
97. 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
98. 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.
99. 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.
100. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
101. 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).
102. 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.
103. 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.
104. 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.
105. Manifolds shall be tagged to identify area served. Each connection on supply & return manifolds shall be permanently labeled with
loop number.
106. 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.
107. 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
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