requirements shall allow for maximum frequency start-stop operation and
minimum encountered interval between start and stop. Motors shall be sized
for the applicable loads. Motor torque shall be capable of accelerating
the connected load within 20 seconds with 80 percent of the rated voltage
maintained at motor terminals during one starting period. Motor bearings
shall be fitted with grease supply fittings and grease relief to outside of
enclosure. Manual or automatic control and protective or signal devices
required for the operation specified and any control wiring required for
controls and devices specified, but not shown, shall be provided. Unit
control panels and electrical components shall be mounted in a NEMA ICS 6,
Type 1 or 3A enclosure.
2.4
MISCELLANEOUS MATERIALS
2.4.1
Refrigerant and Oil
**************************************************************************
NOTE: R-22, R-123 and R-134a all meet the ODP
requirement of 0.05. References to ammonia and IIAR
are made throughout this section. If ammonia is
inapplicable, then delete these references.
**************************************************************************
Refrigerant shall be [one of the fluorocarbon gases. Refrigerants shall
have number designations and safety classifications in accordance with
ASHRAE 34. Refrigerants shall meet the requirements of ARI 700 as a
minimum. Refrigerants shall have an Ozone Depletion Potential of less than
or equal to 0.05] [ammonia in accordance with IIAR 2 and as defined
herein.] Refrigerant systems shall be charged in accordance with
manufacturer's recommendations, including types and quantities of
refrigerant and lubricating oil. Except for factory sealed units, two
complete charges of lubricating oil for each compressor crankcase shall be
furnished. One charge shall be used during the system performance testing
period. Following the satisfactory completion of the performance testing,
the oil shall be drained and replaced with a second charge.
2.4.2
Gaskets
Gaskets shall conform to ASTM F 104 classification for compressed sheet
with nitrile binder and acrylic fibers for maximum 370 degrees C 700
degrees F service.
2.4.3
Bolts and Nuts
Bolts and nuts, except as required for piping applications, shall conform
to ASTM A 307. The bolt head shall be marked to identify the manufacturer
and the standard with which the bolt complies, in accordance with ASTM A 307.
2.4.4
Pipe Hangers, Inserts, and Supports
Pipe hangers, inserts, and supports shall conform to MSS SP-58 and MSS SP-69.
2.4.5
Escutcheons
Escutcheons shall be chromium-plated iron or chromium-plated brass, either
one piece or split pattern, held in place by internal spring tension or set
screws.
SECTION 15652A
Page 16
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