2.3.4
Room Cabinets
Fabricate of 18-gage minimum steel (MSS). Provide removeable front panel
and access panels for equipment machinery, coils, controls, and filters. In
lieu of steel, front panel may be constructed of high impact styrine
structural foam conforming to requirements of UL 484. Structural foam
shall pass tests specified in UL 484 for classification of 94 HB. Line
interior of steel cabinets with insulation having a fire hazard rating not
exceeding 25 for flame spread, and 50 for smoke developed, as determined by
ASTM E 84. Caulk around floor mounted units at the floor. Locate
wall-mounted units 65 mm 2 1/2 inches minimum above the floor.
2.3.5
Grilles
Provide manufacturer's [standard] [architectural] anodized aluminum outdoor
grilles and caulk and seal on all sides when required by manufacturer's
instructions. Provide both horizontal and vertical adjustable deflection
inside air supply grilles. Provide for air return under the front panel or
a return air grille in the lower part of the front panel.
2.3.6
Wall Sleeves and Mounts
Provide manufacturer's standard wall sleeves and mounts. Wall sleeves
shall have seals designed to restrict driving rain and wind. [Provide unit
subbase of the same construction and finish as the sleeve to provide for
concealed electrical connection, cord storage, and equipped with unit
wall mounted thermostat.]
2.3.7
Heating Section for Air Conditioners
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NOTE: Choose the applicable text from the following.
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[a.
Electric Coils: Electric resistance heating elements with high
temperature-limit safety device, factory-mounted, and wired to
chassis.]
[b.
Hot Water Coils: Serpentine type constructed of seamless copper
tubes with aluminum fins mechanically or hydraulically bonded to
tubes. Provide factory-furnished tee and manual air vent on
return connection. Factory test coils at twice maximum operating
pressure.]
[c.
Steam Coils: Serpentine type constructed of red brass or
seamless copper tubes with aluminum fins mechanically or
hydraulically bonded to tubes. Factory test coils at twice the
maximum operating pressure.]
d.
Heating unit shall have internal thermal insulation having a fire
hazard rating not to exceed 25 for flame spread and 50 for smoke
developed as determined by ASTM E 84.
2.3.8
Refrigeration Sections
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NOTE: Several manufacturers' units have a low
operating temperature of 2 degrees C 35 degrees F as
SECTION 15730N
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