Daikin DWSC 050 Installation, Operation And Maintenance Manual page 41

Figure 22, Vane Control Solenoid Operation
HOLDING
Compressor
Unloader
Cylinder
Figure 23, Vane Control Solenoid Operation, Continued
OPENING
CLOSING
42
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
Drain From Piston
Drain From Piston
Centrifugal Chillers
LEGEND
Oil Under Pressure
Piston Drain
#3 Outlet
Section "SB"
SB
De-energized
Section "SA"
SA
De-energized
#1 Inlet
LEGEND
Oil Under Pressure
Oil Sump Pressure
#3 Outlet
Section "SB"
SB
Energized
Section "SA"
SA
De-energized
#1 Intlet
Piston Drain
#3 Outlet
Section "SB"
SB
De-energized
Section "SA"
SA
Energized
#1 Intlet
To Oil
Pump Sump
From Oil
Pump Discharge
To Oil
Pump Sump
From Oil
Pump Discharge
To Oil
Pump Sump
From Oil
Pump Discharge
D-EIMWC00804-14EN