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13-25-629 v03 Page 56
SECTION 9
SERVICING OF MISCELLANEOUS DEVICES
This section will cover basic maintenance of various control devices used with the compressor
package. Refer to Fig 9-1 for pictorial with general locations of these devices.
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 4-15 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 (2)
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 L4-5C
Page 27: ...13 25 629 v03 Page 27 FIGURE 4 5 WIRING DIAGRAM 380V 60 Hz 303ECA546 B Ref Drawing Page 1 of 3...
Page 28: ...13 25 629 v03 Page 28 FIGURE 4 6 WIRING DIAGRAM 380V 60 Hz 303ECA546 B Ref Drawing Page 2 of 3...
Page 29: ...13 25 629 v03 Page 29 FIGURE 4 7 WIRING DIAGRAM 380V 60 Hz 303ECA546 B Ref Drawing Page 3 of 3...
Page 30: ...13 25 629 v03 Page 30 FIGURE 4 8 WIRING DIAGRAM 575V 305ECA546 A Ref Drawing Page 1 of 3...
Page 31: ...13 25 629 v03 Page 31 FIGURE 4 9 WIRING DIAGRAM 575V 305ECA546 A Ref Drawing Page 2 of 3...
Page 32: ...13 25 629 v03 Page 32 FIGURE 4 10 WIRING DIAGRAM 575V 305ECA546 A Ref Drawing Page 3 of 3...
Page 61: ...13 25 629 v03 Page 61 Figure 9 5 Compressor Module Hardware...