HomeMy WebLinkAboutB17-0149_M4-0_1496329320.pdfMechanical Specifications
Sequence of Operation
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. 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.
13. Mechanical Contractor to make final connections to kitchen equipment.
14. See architectural reflected ceiling plan for all ceiling penetrations.
15. Coordinate architectural, structural, electrical, landscaping, fire protection, and interior design drawings with mechanical drawings prior to
installation.
16. Offset piping, ductwork, etc. as necessary to accommodate structure, beams, columns, and existing equipment.
17. 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
18. Contractor must carefully verify electrical service voltage and phase available before ordering any equipment.
19. 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.
20. The following are to be furnished and wired by EC: disconnect switches, thermal overload switches, manual operating switches and contactors.
21. 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
22. 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.
23. 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
24. 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.
25. 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.
26. 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.
27. Field verify locations of all existing piping, equipment, ductwork, etc.
28. All ductwork, diffusers, and equipment shown on this plan are new, except where noted.
29. All new ductwork, piping, equipment, etc. is shown with dark lineweight. All existing ductwork, piping, equipment, etc. is shown with light
lineweight.
30. All removed piping, ductwork, equipment, etc. are to be disposed of by Contractor unless noted otherwise.
31. 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.
32. Extend and modify existing fire protection systems to new and remodeled areas.
33. 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
34. Piping Insulation Schedule:
Service Thickness (in.)
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+:65 ´ SLSH DQG JUHDWHU 2.0
Domestic Hot Water 1.0
Domestic Cold Water 0.5
Domestic Hot Water Recirculation 1.0
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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35. Insulation for all types of piping shall be carried full size through pipe hangers or pipes shall be supported with vibration clamps.
36. Internally line all new RECTANGULAR 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.
37. All new Outside Air (OA) ductwork shall be unlined. Refer to plans for duct labels.
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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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of 6.0.
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 used, increase size
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41. 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.
42. 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,
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installed.
43. PEX piping shall be supported by continuous cradles supplied by the manufacturer.
44. 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.
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 permitted for final connections only.
46. Gas Valves - Lubricated plug valve 175 lb. W.O.G. iron screwed or flanged.
47. 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.
48. 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.
49. Refer to Fixture Connection Schedule for pipe sizes to individual fixtures.
50. Support pipe with rod and clevis or clamps. No pipe tape allowed.
51. Provide expansion joints or loops on all heating water piping runs in excess of 50'.
52. 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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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.
54. Provide plastic grommets on all heating water piping passing through wood joists and studs.
55. Install plumbing clean-outs as required by applicable codes.
Boiler Flue & Combustion Air Piping
56. Boiler flue piping shall be CPVC, complying with ASTM F441.
57. 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.
58. Boiler combustion air piping shall be PVC, complying with ASTM D1785.
Antifreeze Solutions
59. 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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Include corrosion inhibitors.
Ductwork
61. Duct sizes shown on drawings are outside (sheet metal) duct dimensions.
62. All ductwork shall be sealed airtight with duct mastic. Duct tape is prohibited.
63. All returns shall be ducted. Panning of stud cavities, joist bays, etc. is not allowed.
64. Provide 1/4" galvanized mesh screen on all combustion air ducts or openings.
65. Seal all ductwork joints and vapor barrier penetrations at all exterior walls.
66. 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.
67. Provide backdraft dampers at any and all ductwork penetrations through exterior wall (except outside air and combustion air ductwork).
68. Provide turning vanes in all mitered rectangular elbows.
69. Provide volume dampers at all accessible round duct take-offs.
70. Make all final connections to supply GRD's with acoustic flexible duct. Minimum length shall be 4 feet. Maximum length shall be 8 feet.
71. All ductwork or surfaces which are visible behind a grille, register, diffuser or louver shall be painted flat black.
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73. Sheet metal and fittings to be pursuant to SMACNA and ASHRAE standards.
74. All ducts shall be 26 gauge minimum. Duct gauge and construction shall conform to SMACNA HVAC Duct Construction Standards.
75. Contractor to coordinate exact location of grilles and registers before installation.
76. Seal off all ducts during construction.
77. 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.
78. 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.
79. 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
80. 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.
81. Where specified, spring vibration isolators for support of equipment shall be properly aligned so that support rod does not contact spring housing.
Controls
82. Mount all thermostats and humidistats 5'-0" above finished floor.
83. 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.
84. 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.
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information.
86. See Sequence of Operation for additional control information.
Balancing
87. 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.
88. 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.
89. 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 & outlet grille CFM.
90. 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.
91. 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.
92. 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
93. Radiant floor tubing shall be 1/2" nominal diameter, Uponor Wirsbo hePEX or equal. Tubing shall be installed in Warmboard panels, installed
over wood subfloor.
94. 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.
95. Tubing loops off each manifold shall be installed in equivalent lengths (+/- 5%).
96. 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).
1. Thermostats
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type and approved by owner.
b. Line voltage thermostats shall be provided by mechanical contractor and wired by electrical contractor.
2. B-1 Boiler
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maintain HWS setpoint at TS-1 temperature sensor.
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3. Radiant Floor Heating
a. Upon a call for heating, associated on/off control valve shall open and P-2 pump shall start, B-1 boiler shall be enabled.
4. MAU-1 Makeup Air Unit
a. MAU-1 system shall be electrically interlocked with kitchen exhaust hood.
b. When hood is turned on, normally closed motor operated damper shall open, supply fan shall turn on, and once air flow is proven by air
proving switch EDH-1 electric duct heater shall be enabled.
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5. Pumps
a. P-1 B-1 boiler pump: on whenever boiler is called to fire.
b. P-2 space heating pump: on whenever there is a call for heat.
6. Fans
a. EF-1 bath exhaust fans shall each be controlled by an on/off wall switch.
b. SF-1 mechanical room supply fan shall be controlled by a line voltage cooling thermostat.
7. KSH-1 Kickspace Heater
a. KSH-1 kickspace heater shall be controlled as second stage heat by Living/Kitchen thermostat.
4/17/17
06/01/17