MAINTENANCE DATA.
1.4
TESTING FOR CORROSION PROTECTION
Comply with [ASTM A 123/A 123M] [ASTM A 653/A 653M], or protect equipment
with a corrosion-inhibiting coating or paint system that has proved capable
of satisfactorily withstanding corrosion in accordance with ASTM B 117.
Test 125 hours for equipment installed indoors and 500 hours for equipment
installed outdoors or subjected to a marine atmosphere. Each specimen
shall have a standard scratch as defined in ASTM D 1654.
1.4.1
Corrosion Criteria
Upon
completion of exposure, evaluate coating or painting in accordance
with
ASTM D 1654. Coat or paint shall show no indication of deterioration,
loss
of adhesion, or indication of rust or corrosion extending further than
3 mm
1/8 inch on either side of original scratch.
1.4.2
Thickness of Coating
Thickness of coating or paint system on the actual equipment shall be
identical to that on the test specimens with respect to materials,
conditions of application, and dry film thickness.
PART 2
PRODUCTS
2.1
FANS
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NOTE: Indicate sound ratings or loudness level of
equipment in the Equipment Schedule on the drawings.
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Total sound power level of the fan shall not exceed 90 dBA when tested per
AMCA 300 and rated perAMCA 301; statically and dynamically balanced, with
air capacities, brake horsepowers, fan types, fan arrangement, sound power
levels or loudness level, and static pressure as indicated. Fan bearing
life shall have a minimum average life of 200,000 hours at design operating
conditions. [Provide nominal 2 mesh 1.60 mm 0.063 inch wire diameter,
[aluminum] [or] [stainless steel] bird screens for outdoor [inlets] [and]
[outlets].] [Equip with automatic (backdraft) dampers where indicated.]
Have thermal overload protection in the operating disconnect switches
within the building. Construct housings and impellers of [aluminum] [or]
[steel], except as specified otherwise. Provide non-sparking construction
where indicated. For wiring terminations, provide terminal lugs to match
branch circuit conductor quantities, sizes, and materials. Enclose
terminal lugs in terminal box sized to NFPA 70.
2.1.1
Centrifugal Fans
AMCA 210 with AMCA seal, [utility] [forward-curved] [radial]
[backward-curved] [backward-inclined] [airfoil] [single width] [double
width] type, [direct] [or] [V-belt] drive motors, and [manual] [or]
[automatic] inlet vanes [as indicated]. Provide bearing cooling fan (heat
slinger) [and threaded drain connection]. [Inlet and outlet duct
connections shall be flanged.] Impeller shall be constructed of steel [or
aluminum] with smooth curved rim, back plate, blades, and cast iron [or
cast steel] hub riveted to back plate and keyed to shaft with set screws.
SECTION 15720N
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