13-25-607 Page 53
SECTION 9
SERVICING OF MISCELLANEOUS DEVICES
This section will cover basic maintenance of various control devices used with the compressor
module. Refer to Fig 9-1, Page 53, for pictorials of referenced hardware.
INLET CONTROL VALVE ASSEMBLY
Inlet-Valve Assembly (2) -
This device is located within and below the intake flange of the compressor -
see Figure 9- 1 for internal details and Figure 4-6, page 29 for schematic details.
During the loaded state, the
inlet poppet (2.2)
remains open and enables atmospheric air to enter the
compressor inlet - this is done by venting to atmosphere the gas trapped underside of the piston via
check valve (19)
and
orifice
(18)
. During the unloaded state, a two-way solenoid valve feeds
pressurized air underneath the
piston
(2.1)
, forcing it and
the inlet poppet (2.2)
upward and blocking-off
the compressor intake. A small purge check valve, located in the poppet, allows a stream of air to reach
(e.g., purge) the rotors and keep them from unstable, noisy operation and producing sufficient pressure to
maintain cooling / lubricating oil flow.
Figure 9- 1 – Inlet Valve Assembly
Air/oil pressure will cause severe personal injury or death. Shut down
compressor, relieve system of all pressure, disconnect, lockout and tagout
power supply to the starter before removing valves, caps, plugs, fittings, bolts
and filters.
Summary of Contents for APEX15-18A
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Page 31: ...13 25 607 Page 29 Figure 4 6 WIRING DIAGRAM VS 575 VOLT 307UCC546 A Ref Drawing Page 1 of 4...
Page 32: ...13 25 607 Page 30 Figure 4 7 WIRING DIAGRAM VS 575 VOLT 307UCC546 A Ref Drawing Page 2 of 4...
Page 33: ...13 25 607 Page 31 Figure 4 8 WIRING DIAGRAM VS 575 VOLT 307UCC546 A Ref Drawing Page 3 of 4...
Page 34: ...13 25 607 Page 32 Figure 4 9 WIRING DIAGRAM VS 575 VOLT 307UCC546 A Ref Drawing Page 4 of 4...
Page 37: ...13 25 607 Page 35 Figure 4 10 PIPING AND INSTRUMENTATION ILLUSTRATION 301UCC797 F Ref Drawing...
Page 60: ...13 25 607 Page 58 Figure 9 6 Compressor Module Hardware 308UCC810 C Ref Drawing Page 1 of 1...
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