operating pressure and shall be removable for service access without the
use of special tools. Condensate pans shall be minimum 22 gage1.0
millimeter Type 304 stainless steel and shall be piped to drain.
Exterior surfaces of cabinets constructed of mill-galvanized steel shall be
finished by the manufacturer's standard enamel finish in [the
specified][the indicated] color.
CRACU manufacturer's standard cabinet materials and finishes will be
acceptable if considered equivalent to the above requirements by the
Contracting Officer.
[2.1.1.2
Cabinet Interiors Sound Attenuation
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NOTE: For CRACU interior cabinets located in spaces
which require low sound levels because of
interaction requirements of the operating personnel,
select desired sound attenuation methods specified
in this paragraph. In noise sensitive areas,
specifiers should take special steps to attenuate
CRACU generated sound, such as using the two inch
foam requirement, in lieu of the fiber glass
insulation.
**************************************************************************
Provide a factroy-installed sound attenuation system in the interior of the
CRACU cabinet.
[CRACU cabinet panels interior shall be provided with 25 millimeters of 24
kilogram per cubic meter one inch of 1 1/2 pound per cubic foot
neoprene-coated fiber glass insulation on interior of cabinet panels.
Insulation shall be applied to the cabinet panels with 100 percent adhesive
coverage and both the insulation and the adhesive shall conform to NFPA 90A
].
[CRACU cabinet panels interior shall be provided with minimum 50 millimeters
two inchthick acoustical sound absorbing foam with a minimum Noise
Reduction Coefficient (NRC) of 0.85].
[Compressors located in CRACU interior cabinets shall be either wrapped in
a sound absorbing insulating blanket or enclosed in it's own sound
absorbing insulated mini-cabinet inside of the larger CRACU interior
cabinet.]
[Fans and compressors located in the CRACU interior cabinet shall be
provided with vibration isolators between their respective support frames
and the cabinet framing.]
CRACU manufacturer's standard interior cabinet sound attenuation materials
and finishes will be acceptable if considered equivalent to the above
requirements by the Contracting Officer.
]2.1.2
Fan Section
**************************************************************************
NOTE: For CRACU units of sizes 6 tons and more,
specify dual V-belt fan drives.
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SECTION 15702N
Page 8
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