HomeMy WebLinkAboutB14-0264_M4.0_1430849280.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, pumps and valves 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, 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.
19. Contractor must carefully verify electrical service voltage and phase available before ordering any equipment.
Shop Drawings
20. 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, boilers, and heat pumps.
21. 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
22. Insulate all new heating water, domestic hot water, domestic cold water, domestic hot water recirculation, heating water, chilled water, and
snowmelt piping (mains and runouts to areas being heated) with U.L. approved, white, all service, glass fiber, snap-on, 1" thick on mains
and 1
2" thick on runouts, pipe insulation. Insulate fittings with glass fiber blanket insulation and premolded PVC covers. Provide deduct
alternate price to insulate with Armaflex. Exposed piping such as in the mechanical room and the crawl space mains shall be insulated with
white fiber glass type. Cover outdoor chilled water piping 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.Insulation shall be properly installed on
all piping elbows to adequately insulate the 90 degree bend.
23. Insulation shall be installed under all radiant heated floors on slab. R-15 minimum.
24. Insulation shall be installed under all exterior snowmelt areas. Insulation shall be minimum R-10 "blue board" foam insulation, 2" thick.
Insulation must have pressure rating suitable for application.
25. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall be supported with vibration clamps.
26. DUCT LINER: Internally line all new ductwork (unless noted otherwise) with 1/2" thick, 2.0 PCF, U.L. rated, glass fiber insulation witha
continuous vapor barrier.
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Piping
28. All buried pipe shall be surrounded with 4" of clean sand.
29. Domestic Hot, Cold & Recirculation piping inside building - Type 'L' copper, wrought copper fittings, and no lead solder. Provide a deduct
alternate price for PEX.
30. Waste piping (above ground) - Standard weight, C.I. soil pipe, and fittings, or hubless, C.I. soil pipe and fittings.
31. Waste piping (below grade and in crawl spaces) - 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.
32. Vent piping - 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.
33. Heating Water & Chilled Water piping - Type 'L' copper, wrought copper fittings, and no lead solder. Provide deduct alternate for PEX-a
with oxygen diffusion barrier. Piping sizes shown on plans are for copper. Increase PEX pipe size by one size if changing to PEX.
34. Snowmelt Piping (inside building) - Type 'L' copper, wrought copper fittings, and no lead solder. Provide deduct alternate for PEX-a with
oxygen diffusion barrier. Piping sizes shown on plans are for copper. Increase PEX pipe size by one size if changing to PEX.
35. Snowmelt Piping (outside of building) - Pre-insulated PEX piping (Rehau, Urecon, Uponor or equal). Bury minimum 4' deep and surround
with 4" of clean sand.
36. Drain Pan & Cooling Coil Condensate Piping - Type 'M' copper, wrought copper fittings, and no lead solder OR Schedule 40 PVC-DWV
plastic pipe and fittings (ASTM D2665) OR PEX.
37. 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.
38. 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. CSST pipe is prohibited, except for final connections to appliances. Welded gas piping must be
pressure tested at 60 psi minimum per Town of Vail.
39. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
40. 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.
41. Support pipe with rod and clevis or clamps. No pipe tape allowed.
42. Provide expansion joints or loops on all heating water piping runs in excess of 50'.
43. Dielectric Unions - Furnish and install a dielectric union at all connections where non-ferrous material is in contact with ferrous material
and fluid in 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.
45. Provide plastic grommets on all heated fluid water piping passing through wood joists and studs.
Boiler Flue & Combustion Air Piping
46. Boiler flue piping shall be a polypropylene (PP) venting system, listed in accordance with ULC-S636, and rated for flue gas venting
systems. Flue shall be Centrotherm Innoflue, Duravent PolyPro or equal.
47. Boiler combustion air piping shall be PVC, complying with ASTM D1785.
Antifreeze Solutions
48. Fill heating water system with 30% propylene glycol / 70% water solution. Include corrosion inhibitors.
49. Fill chilled water system with 38% propylene glycol/ 62% water solution. Include corrosion inhibitors.
50. Fill snowmelt systems with 50% propylene glycol / 50% water solution. Include corrosion inhibitors.
Ductwork
51. Duct sizes shown on drawings are outside (sheet metal) duct dimensions.
52. All ductwork shall be constructed from minimum 26 gauge thickness sheetmetal per SMACNA standards.
53. All ductwork shall be sealed airtight with duct mastic.
54. All returns shall be ducted. Panning of stud cavities, joist bays, etc. is not allowed.
55. Provide 1/4" galvanized mesh screen on all combustion air ducts or openings.
56. Seal all ductwork joints and vapor barrier penetrations at all exterior walls.
57. 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.
58. Provide backdraft dampers at any and all ductwork penetrations through exterior wall (except outside air and combustion air ductwork).
59. Provide turning vanes in all mitered rectangular elbows.
60. Provide volume dampers at all accessible round duct take-offs.
61. Make all final connections to supply GRD's with acoustic flexible duct. Minimum length shall be 4 feet. Maximum length shall be 8 feet.
62. All ductwork or surfaces which are visible behind a grille, register, diffuser or louver shall be painted flat black.
63. All dryer vents and bathroom exhaust ducts shall be rigid galvanized round duct.
64. Sheet metal and fittings to be pursuant to SMACNA and ASHRAE standards.
65. Contractor to coordinate exact location of grilles and registers before installation.
66. Seal off all ducts during construction.
67. 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.
68. 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.
69. 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.
Controls
70. Mount all thermostats, humidistats, and sensors 5'-0" above finished floor.
71. Thermostats & remote temperature sensors shall not be installed above heat emitting equipment, including wall mounted touch screen
controls and light pad controls. Do not mount on exterior walls or above/below forced air supply registers.
72. 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.
73. 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.
75. See Sequence of Operation sheet M4.1 for additional control information.
Balancing
76. 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. Air balancing shall include balancing of supply air, return air, exhaust air, and
outside air.
77. 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.
78. 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.
79. Hydronic measurements shall include all motor amperage, voltage readings, circuit setters, 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.
80. 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.
81. 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 & Snowmelt
82. Radiant floor tubing shall be 1/2" nominal diameter. Snowmelt tubing shall be 5/8" diameter. All tubing shall be PEX-a crosslinked
polyethylene with an oxygen diffusion barrier, manufactured by the Engle method.
83. Piping shall be installed in continuous loops, no splices allowed. The maximum loop lengths are specified in the radiant & snowmelt zone
schedules on the plans. Tubing loops off each manifold shall be installed in equivalent lengths (plus/minus 5%).
84. 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).
Vibration Isolation
85. 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.
86. Where specified, spring vibration isolators for support of equipment shall be properly aligned so that support rod does not contact spring
housing.
IECC Requirements
87. Refer to REScheck report by Rader Engineering for complete list of 2012 IECC requirements.
88. Blower door testing shall be performed by an approved third party, per 2012 IECC section R402.4.1.2. A written report of the results of the
test shall be submitted to the building department. Air leakage rate shall not exceed 3 ACH when the blower door is operating at a pressure
of 50 Pa.
89. Swimming pools and in-ground spas:
89.1. Heaters shall have a readily accessible on/off switch.
89.2. Heaters operating on natural gas or LPG shall have an electronic pilot light.
89.3. Schedule-capable automatic on/off timer switches shall be installed on heaters and pumps.
89.4. Heated pools and spas shall have a vapor retardant cover.
90. A permanent REScheck certificate shall be provided on or in the electrical distribution panel listing the predominant insulation R-values,
window U-factors, type and efficiency of space conditioning and water heating equipment, and results from any required duct system and
building envelope air leakage testing. The certificate shall not cover or obstruct the visibility of the circuit directory label, service
disconnect label, or other required labels.
Mechanical Specifications
4/27/15
05/05/15