Daikin WSC100 - Page 41

IM 1044-2 Centrifugal Chillers 41
Figure 27, Vane Control Solenoid Operation
Compressor
Unloader
Cylinder
Floating Piston Linked to Inlet Vanes
Opens Vanes
Closes Vanes
Four-Way Solenoid
Valve Located on
Compressor or
in Lube Box
Piston Drain
#3 Outlet
SB
SA
#1 Inlet
LEGEND
Oil Under Pressure
To Oil
Pump Sump
Section “SB”
De-energized
Section “SA”
De-energized
From Oil
Pump Discharge
Adjustable Needle Valves
Integral With Four-Way
Solenoid Valve
HOLDING
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.
Oil Pump
Contactor
Oil Pump
Capacitor
Compressor
MicroTech II
controller
Cooling
Water Inlet
Cooling
Water Outlet
Temperature
Control Valve
Solenoid
Valve
Oil Sump
Relief Valve
Back Seat Port