thermal overload protection as required by NEMA, pressure switch, inlet
filter-mufflers, vibration isolators, intercoolers, aftercooler, and
flexible connectors. Provide safety control for shutdown and alarm on high
discharge air temperature or low oil pressure. Capacity and operating
pressure as indicated on drawings. Mount compressor and motor on a base
plate [and set on the receiver. Design receiver for additional load of
compressor and motor].
2.4.1
Receiver
Build receiver (tank) of welded steel, in accordance with ASME BPVC SEC
VIII D1, Unfired Pressure Vessels, for [2751] [_____] kPa (gage) [399]
[_____] psig working pressure at [232] [_____] degrees C [450] [_____]
degrees F, complete with pressure gage, ASME BPVC SEC VIII D1 and ASME BPVC
SEC IX code stamped safety valve, check valve, shut-off valve on tank
outlet, and automatic tank drain on tank. Provide tank with steel supports
and bolt to a concrete foundation. Capacity as indicated.
2.4.2
Motor and Starter
Provide motor and starter 40 degrees C 72 degrees F ambient temperature
rise, continuous duty, drip-proof type motor, ball bearings, for operation
with current of voltage, phase, and cycle indicated on the electrical
drawings. Motor of such capacity that brake horsepower required by driven
equipment at normal rated capacity will not exceed nameplate rating of
motor. Provide each motor with automatic, fully enclosed, magnetic
starter. Conform to NEMA MG 1 for motor and NEMA ICS 2and NEMA ICS 6 for
starter and controls.
2.4.3
Controls
**************************************************************************
NOTE: Select the first paragraph for only
start-stop control or the second paragraph and
subparagraphs for dual control.
**************************************************************************
[Provide start-and-stop control. Motor shall stop automatically when
discharge pressure reaches maximum pressure setting and start automatically
when discharge pressure falls to minimum setting. Cylinders shall unload
automatically during periods of motor shutdown.]
[Regulate compressor by dual control. Dual system shall consist of a
combination of constant speed control and an automatic start-and-stop
control by automatic or manual selector switch.]
**************************************************************************
NOTE: Include "Start-and-Stop Control" and
"Constant Speed Control" below only for the "Dual
Control" option.
**************************************************************************
2.4.3.1
Start-and-Stop Control
When set for start-and-stop control, motor shall stop automatically when
discharge pressure reaches maximum pressure setting and start automatically
when discharge pressure falls to minimum setting. Cylinders shall unload
during periods of motor shutdown.
SECTION 15212N
Page 21
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