HomeMy WebLinkAboutB15-0052_MC4.0_1429736040.pdfMechanical 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
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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 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.
Shop Drawings
19. 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 furnaces.
20. 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 and electrical systems. Equipment shall be drawn to
scale.
Remodel, Demolition & Unforeseen Conditions
21. 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.
22. 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.
23. 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.
24. Field verify locations of all existing piping, equipment, ductwork, etc.
25. Be responsible to field verify existing equipment or ductwork remaining to be reconnected to new or existing systems. Provide
ductwork, piping, controls, diffusers, etc., as required to restore continuity to system(s).
26. All ductwork, diffusers, and equipment shown on this plan are new, except where noted.
27. All new ductwork, piping, equipment, etc. is shown with dark lineweight. All existing ductwork, piping, equipment, etc. is shown with
light lineweight.
28. All removed piping, ductwork, equipment, etc. are to be disposed of by Contractor unless noted otherwise.
29. 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
30. (Residential) Insulate all new heating water, domestic hot water, domestic hot water recirculation, 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.
31. Insulation shall be installed under all exterior snowmelt areas. Insulation shall be extruded polystyrene foam board insulation that has an
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32. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall be supported with vibration clamps.
33. 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 75oF
mean temperature. Buried insulation shall be wrapped in a waterproof tape, e.g. Densotape or approved equal.
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insulation with a continuous vapor barrier.
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butted together, use factory recommended adhesive.
Piping
37. 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
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38. Waste & Vent piping inside building:
Waste piping (above ground) - Standard weight, C.I. soil pipe, and fittings, or hubless, C.I. soil pipe and fittings.
Waste piping (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.
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.
39. 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 if changing to PEX.
40. Snowmelt Piping (outside building) - Pre-insulated PEX piping (Rehau, Urecon, Uponor or equal. Bury minimum 4' deep and surround
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41. PEX piping shall be supported by continuous cradles supplied by the manufacturer.
42. 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).
43. 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.
44. 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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sand.
45. 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.
46. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
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. Provide expansion joints or loops on all heating water piping runs in excess of 50'.
50. 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.
51. Install plumbing clean-outs as required by applicable codes.
Boiler Flue & Combustion Air Piping
52. B-1 Boiler flue piping shall be CPVC, complying with ASTM F441.
53. B-1 & B-2 Boiler combustion air piping shall be PVC, complying with ASTM D1785.
54. B-2 Boiler flue piping shall be PVC, complying with ASTM D1785.
Antifreeze Solutions
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Ductwork
57. Duct sizes shown on drawings are outside (sheet metal) duct dimensions.
58. All ducts shall be 26 gauge minimum. Duct gauge and construction shall conform to SMACNA HVAC Duct Construction Standards.
59. All ductwork shall be sealed airtight with duct mastic. Duct tape is prohibited.
60. All returns shall be ducted. Panning of stud cavities, joist bays, etc. is not allowed.
61. Provide 1/4" galvanized mesh screen on all combustion air ducts or openings.
62. Seal all ductwork joints and vapor barrier penetrations at all exterior walls.
63. 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.
64. Provide backdraft dampers at any and all ductwork penetrations through exterior wall (except outside air and combustion air ductwork).
65. Provide turning vanes in all mitered rectangular elbows.
66. Provide volume dampers at all accessible round duct take-offs.
67. Make all final connections to supply GRD's with acoustic flexible duct. Minimum length shall be 4 feet. Maximum length shall be 8
feet.
68. All ductwork or surfaces which are visible behind a grille, register, diffuser or louver shall be painted flat black.
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70. Sheet metal and fittings to be pursuant to SMACNA and ASHRAE standards.
71. Contractor to coordinate exact location of grilles and registers before installation.
72. Seal off all ducts during construction.
Vibration Isolation
73. 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.
74. Where specified, spring vibration isolators for support of equipment shall be properly aligned so that support rod does not contact spring
housing.
Controls
75. Mount all thermostats 5'-0" above finished floor.
76. Thermostats 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.
77. 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.
78. See Sequence of Operation for additional control information.
Balancing
79. 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.
80. 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.
81. 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.
82. 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.
83. 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.
84. 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.
Snowmelt
85. 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.
86. 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. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
87. 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).
88. 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.
89. 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.
90. 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.
91. 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.
Sequence of Operation
1. Thermostats
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b. Line voltage thermostats shall be provided by mechanical contractor and wired by electrical contractor.
2. B-1 Boiler (Side A)
a. B-1 boiler shall be controlled by integral Lochinvar controls to maintain heating water setpoint at temperature sensor TS-1.
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e. P-1 boiler pump shall run whenever boiler is called to fire.
3. WH-1 Water Heater (Side A)
a. Upon a call for heating from temperature sensor TS-2DW:+ߛVHWDW)DGMߜ3ZDWHUKHDWHUSXPSVKDOOVWDUW
b. P-6 domestic hot water recirculation pump shall be controlled by integral timer and aquastat.
4. Space Heating (Side A)
a. Upon a call for space heating, associated control valve shall open and P-3 pump shall start.
5. Snowmelting (Side A)
a. Provide (1) snow/ice sensors and sockets (Tekmar 091/094).
b. Provide (1) Tekmar 667 snowmelt control.
c. Upon a call for snowmelting from snow/ice sensor, P-5 snowmelt pump and P-4 heat exchanger pump shall start. Tekmar control
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outdoor temperature is above this setting.
6. F-1 Furnace & CU-1 Condensing Unit (Side B)
a. Provide a complete Carrier Infinity zoning and control system with thermostats and modulating duct dampers for a 3 zone system.
System shall control fan speed, gas burner modulation, condensing unit staging, zone dampers, etc.
b. MODE: Furnace mode of operation (heating or cooling) shall be determined based on Carrier Infinity algorithms.
c. COOLING: Upon a call for cooling, fan shall start and CU-1 condensing unit shall be enabled to flow DC-1 duct coil.
Condensing unit shall be modulated as directed by Infinity controls to meet the space cooling demand. Fully modulating cooling
is available.
d. HEATING: Upon a call for heating, fan shall start and gas burner shall be enabled. Gas burner shall modulate as directed by
Infinity controls to meet the space heating demand. Fully modulating heating is available.
e. ZONING: Zone dampers shall modulate based on demand. No bypass ductwork/damper shall be installed.
7. WH-2 Gas Water Heater (Side B)
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b. P-9 domestic hot water recirculation pump shall be controlled by integral timer and aquastat.
8. B-2 Boiler (Side B)
a. B-2 Boiler shall be controlled by integral Lochinvar controls to maintain snowmelt water setpoint at TS-4 temperature sensor.
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c. Boiler shall be enabled during calls for snowmelting.
d. P-7 boiler pump shall run whenever boiler is called to fire.
9. Snowmelting (Side B)
a. Provide (1) snow/ice sensors and sockets (Tekmar 091/094).
b. Provide (1) Tekmar 654 snowmelt control.
c. Upon a call for snowmelting from snow/ice sensor, P-8 snowmelt pump shall start.
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outdoor temperature is above this setting.
10. Fans
a. EF-1 bath exhaust fans shall each be controlled by an on/off wall switch.
11. UH-1 & 2 Unit Heaters
a. Upon a call for heat from line voltage heating thermostat, fan shall start and gas burner shall start.
12. EHM-1, 2, & 3 Electric Heat Mats
a. Upon a call for heat from Sunstat View thermostat, electric heat mat shall be energized.
13. Pumps
a. P-1 B-1 boiler pump: on whenever boiler is called to run.
b. P-2 WH-1 water heater pump: on whenever there is a call for heating from TS-2 temperature sensor.
c. P-3 space heating pump: on whenever there is a call for space heating. Grundfos Magna pump is equipped with an integrated
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mode.
d. P-4 HX-1 heat exchanger pump: on whenever there is a call for heat from TS-3 temperature sensor.
e. P-5 snowmelt pump: on whenever there is a call for snowmelting
f. P-6 domestic hot water recirculation pump: controlled by integral timer and aquastat.
g. P-7 B-2 boiler pump: on whenever boiler is called to run.
h. P-8 snowmelt pump: on whenever there is a call for snowmelting.
i. P-9 domestic hot water recirculation pump: controlled by integral timer and aquastat.
3/3/15
04/22/15