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GEM0650/0956/1256 Remote Operation: Refrigeration
Page 23
Pump Down
During the pump down cycle (usually initiated by the circuit board de-energizing the liquid line valve) the
discharge gases flow through their normal path to the remote condenser, through the head pressure control
and into the receiver. At this point the refrigerant flow is stopped by the closed liquid line valve.
This action forces the refrigerant into the receiver and keeps it out of the compressor. The pump down
continues until the pump down control opens turning the compressor off.
Refrigeration Schematic
Discharge
Line
Liquid Line
Head Pressure
Control Valve
Receiver Com
p
ressor
Liquid Line Valve (Closed)
Remote Condenser