Section 7 Refrigeration System
7-5
Remote Automatic Shut-Off (Models J450/J600/J800/J1000)
Automatic Shut-Off
The compressor and liquid line solenoid valve are de-
energized simultaneously when the contactor contacts
open.
During the off cycle, the check valve prevents
refrigerant from migrating back into the high side,
and the liquid line solenoid prevents refrigerant from
migrating back into the low side. This protects the
compressor from refrigerant migration during the off
cycle, preventing refrigerant slugging upon start-up.
SV1568
EVAPORATOR
HEAT
EXCHANGER
EXPANSION
VALVE
HOT GAS
SOLENOID VALVE
STRAINER
REMOTE
CONDENSER
RECEIVER
SERVICE VALVE
COMPRESSOR
DRIER
LIQUID LINE
SOLENOID
RECEIVER
CHECK VALVE
CHECK VALVE
HARVEST
PRESSURE
REGULATING
HARVEST
PRESSURE
REGULATING
HEAD
PRESSURE
CONTROL
C
B
R
LIQUID/VAPOR EQUALIZED TO
AMBIENT CONDITIONS
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