Complete Compiled Specification.pdf - Peck Ormsby Construction

hour salt spray under ASTM B117 test method.
Propeller shall be extruded aluminum airfoil design with cast aluminum hub. The blade pitch shall be factory
set and locked. The hub shall be keyed and locked to the shaft utilizing two set screws or a taper lock
bushing. Propeller shall be balanced in accordance with AMCA Standard 204-06.
Motor shall be heavy duty type with permanently lubricated sealed ball bearings and furnished at the
specified voltage, phase, and enclosure.
Bearing construction shall be heavy duty regreasable ball type in a cast iron housing.
Belts shall be oil and heat resistant, non-static type. Drives shall be precision machined cast iron type,
keyed and securely attached to the wheel and motor shafts. Drives shall be sized for 150% of the installed
motor horsepower. The variable pitch motor drive must be factory set to the specified fan RPM.
Fan shall be Penn, Cook, Greenheck, Twin City or Jenn-Air.
Ceiling Type:
Furnish and install complete the ceiling-mounted exhaust fans shown and specified on the drawings.
Fan shall have acoustically insulated housing for quiet operation. Air deliveries shall be as indicated on the
drawings and shall be certified by AMCA performance tests.
Fan shall have centrifugal wheel direct connected to motor. Ceiling grille shall be all aluminum construction
with satin finish. Entire fan, motor, and wheel assembly shall be removable without disturbing the housing.
Fan speeds shall not exceed 1100 RPM. Unit shall be complete with backdraft damper.
Fan shall be Cook, Penn, Greenheck, Twin City, or Jenn-Air.
AIR FILTER BANKS:
Furnish and install the filtering bank systems shown and specified on the drawings. Filter banks shall be
suitable for the space available. Filter banks shall be constructed and installed so as to prevent the passage
of unfiltered air. Felt, rubber, or neoprene gaskets shall be provided between filter frames and unit casing,
etc. Steel filter parts shall be protected against corrosion.
Filter bank shall consist of 35% efficient (ASHRAE 52-76 test standard) replaceable media type air filters.
The supporting front grid of each filter section shall be hinged to facilitate easy replacement of filter media.
Filter frames shall be of 18 gauge galvanized steel construction with 11 gauge galvanized steel wire grids to
support the media.
Provide draft gauge on filter banks processing 10,000 CFM or more to indicate pressure drop across each
filter bank.
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SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION March 2, 2009
AIR DISTRIBUTION 15800 - 9