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Figure 20, Oil Sump and Compressor Controller Panel
Relief Valve
Oil Sump
Solenoid
Valve
Temperature
Control Valve
NOTE: 4-way solenoid valve and vane close switches are located on the compressor
suction inlet. The mechanical high-pressure cutout is located in the discharge line.
Figure 21, Vane Control Solenoid Operation
HOLDING
Compressor
Unloader
Cylinder
Floating Piston Linked to Inlet Vanes
Opens Vanes
Closes Vanes
Four-Way Solenoid
Valve Located on
Compressor or
in Lube Box
Adjustable Needle Valves
Integral With Four-Way
Solenoid Valve
LEGEND
Oil Under Pressure
Piston Drain
#3 Outlet
Section "SB"
SB
De-energized
Section "SA"
SA
De-energized
#1 Inlet
D–EIMWC00808-16HU - 42/64
Back Seat Port
Oil Pump
Contactor
Oil Pump
Capacitor
Compressor
MicroTech II
controller
Cooling
Water Inlet
Cooling
Water Outlet
To Oil
Pump Sump
From Oil
Pump Discharge
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