Complete Compiled Specification.pdf - Peck Ormsby Construction

Fan system shall not be operated to provide temporary heat or for other purposes, until the filters are in
place.
At time of acceptance of the work, new filter media shall be furnished and installed by the contractor.
Provide one complete set of spare filter media (in addition to the new filters installed at time of acceptance)
for each filter bank and store on site as directed by the owner's representative.
Air filter banks shall be Cambridge, AAF, or Farr.
VARIABLE AIR VOLUME RE-HEAT BOXES:
Casings shall be 26 gauge galvanized with flange rectangular discharge duct connection. A one-piece
aluminum backdraft damper shall be provided on the fan discharge. The damper shall be factory set and
aligned to insure a precise seal. Leakage rate shall not exceed 2 percent of rated capacity at 0.5" static
pressure.
Automatic damper operators and controllers shall be furnished by the ATC contractor and installed by the
VAV box manufacturer.
The VAV box manufacturer shall furnish and install an approved cross flow sensor with a gain factor of not
less than three (3).
VAV boxes shall be provided with a pressure independent volume regulator which operates thru a
thermostatically reset velocity controller to provide constant air delivery within plus or minus 5 percent of
rated flow, and down to 25 percent of the VAV box rated CFM. Factory calibrated field adjustable setpoints
shall be provided to set maximum and minimum CFM.
The hot water heating coil shall be a single or multiple row unit as specified with plate-type aluminum fins
and mechanically bonded to a copper tube carrier pipe.
The entire unit shall be serviceable from a single ceiling access door.
The sound attenuators shall be 26 gauge galvanized steel construction with high density matt-faced
insulation. Insulation shall be UL listed and meet all requirements of NFPA-90A.
Units shall be Metalaire, Price, Nailor or Titus.
CROSS FLOW PRESSURE SENSORS FOR VAV BOXES:
Sensors shall be aluminum corrosion resistant of the cross flow type with ported tubes and baffle mounted to
a center manifold. The center manifold shall have 1/4" barb fittings for FRPE tubing, and shall provide a
differential pressure proportional to the average velocity of air moving through duct.
The sensors shall have an amplification factor (gain) of at least three and flow coefficient as follows:
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SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION March 2, 2009
AIR DISTRIBUTION 15800 - 10