15800 Heating Ventilating And Conditioning15800
Heating, Ventilating, and Air Conditioning
PART 1 - GENERAL
SUMMARY
Section includes HVAC systems and support.
Related Sections:
Section 01640 Owner Supplied Products. Central heating ventilating and air conditioning equipment, thermostats and controls, and infra-red heaters and thermostats will be supplied by
Owner. Contractor shall coordinate with Owner’s representative regarding product information, shipping, and installation procedures.
Trane
Anton Mogilevsky, National Account Manager
Phone: (503) 431-2516
Fax: (503) 639-1454
E-mail: abmogilevsky@trane.com
Space Ray Northwest
Tom Rissman, Product Representative / Distributor
Phone: (800) 684-1122
Fax: (206) 374-2466
E-mail: tom@spaceraynw.com
SUBMITTALS
Within fifteen (15) days after signing a contract or receiving a letter of intent to sign a contract, submit for review the required copies of a complete list of materials proposed for
use including sizes, capacities, etc. See drawings and general provisions for requirements. Such list shall include:
Rooftop units.
Exhaust fans.
Registers, diffusers, grilles, dampers, louvers.
Radiant heaters.
Unit heaters.
Roof caps and vents.
No substitute materials may be installed without the written approval of the Owner.
All additional costs incurred by the substitution of materials or equipment, or installation thereof, whether Architectural, Structural, Mechanical, Electrical or Plumbing, shall be
borne as part of the expense incurred under this section.
COORDINATION WITH ELECTRICAL CONTRACTOR
This Contractor shall coordinate with the Electrical Contractor on controls, motors, starters, etc.
Responsibility for furnishing all controls, including thermostats, on-off switches, transformers, and relays is included in the HVAC specifications.
Low voltage wiring shall be furnished and installed by this Contractor. Line voltage wiring and conduit shall be furnished and installed by Electrical Contractor.
This Contractor shall review all wiring connections which have any influence on Contractor’s equipment or work and verify that these connections are correct before permitting any equipment
which is furnished, installed or modified under this contract to be operated.
Motors required for operation of the HVAC equipment shall be furnished and installed under HVAC work.
Magnetic starters with proper overload protection for motor controls shall be furnished under HVAC work for each motor 1/2 horsepower and larger and installed.
FINISH AND PAINTING
See Section on Painting and Finish.
Prime and paint all diffuser boot and duct interiors where visible through grilles with a matte black finish.
Prime and paint louver or grille exteriors where required by Owner.
PART 2 - PRODUCTS
DUCTWORK
Galvanized sheet steel of thickness recommended in Table 1-4 and 3-2 of the SMACNA “HVAC Duct Construction Standards, latest Edition. Flexible ductwork shall be limited to runouts not
to exceed 10'-0" in length.
Insulate ducts with 2-inch thick fiberglass Manville “Linacoustic” installed with stick clips and adhesive as recommended by manufacturer. K factor = 0.12 at 75 degrees F. mean temperature
with an NRC rating - R=8.4. Insulate concealed ducts with 3 inch fiberglass Manville Standard R faced duct wrap installed per manufacturer’s application specification. C=0.28 at 75
degrees F. mean temperature with 0.75 lb./cu.ft. density, R=10.0.
All duct insulation shall be in conformance with in latest edition of the applicable Energy Code.
PART 3 - EXECUTION
DUCTWORK
All ductwork of sheet metal or fiberglass shall be in accordance with the SMACNA “HVAC Duct Construction Standards, latest Edition. Duct work shall be airtight and smooth, of recommended
construction, installed and supported as recommended.
Should it be found impractical to install any duct of the exact size given, a duct of a different shape, but having the same air resistance, shall be installed. These alternate duct
sizes are to be approved by the Engineer prior to installation. Duct sizes given are internal sizes, net inside dimensions, inside of linings.
All elbows 45 degrees or greater shall be full radius elbows (centerline radius equal to duct width) or shall have turning vanes.
End of ducts shall turn over 3/4 inch for airtight connections between duct and grilles. The ducts and grilles shall have separate sets of screws. Register frames and ends of ducts
shall be properly placed before finishing is begun.
All ducts shall be supported at 5-foot centers with 1-inch by 16 gauge straps for sheet metal ducts and 3-inches by 16 gauge for fiberglass.
Seal joints and seams airtight.
Provide volume control extractors or dampers at each branch take-off from main ducts or as noted on drawings.
AIR BALANCING
The complete air system shall be tested and balanced by installing contractor.
Adjust all air flows to be within plus or minus 10 percent of specified.
Prove the correct operation of all controls, dampers, heating stages, cooling stages, timers and thermostats.
The installing contractor shall provide labor and materials as required to assist the balancing engineer in the performance of that work, including the installation of manual dampers
where required to properly balance system.
At the completion of the balancing operation, provide the Architect with three (3) copies of the Air Balance Data, in a bound booklet form, showing:
Required CFM and actual measured CFM for each air outlet register, supply and return, each exhaust grille, minimum outside air at each AC-unit, and total CFM for each system.
Static pressure across exhaust fans and AC-unit with filter.
Temperature rise across heat exchanger for AC-unit.
Temperature drop across cooling coil for AC-unit.
CONTROLS
A complete building control system shall be provided. System shall include all component required to provide occupant comfort in each room. See drawings for further data.
INSTRUCTION BOOK
The contractor shall provide the Owner with one (1) copy of complete written instructions in the operation of the various systems. The instructions shall be bound, in booklet form,
and shall include pertinent information on the equipment with names of local suppliers and agents. The Contractor shall also instruct the Owner or the Owner’s representatives in the
operation of the system.
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