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T -309
2-11
LIQUID ECONOMIZERPRESSURE
ECONOMIZER
ECONOMIZER
SERVICE
CONNECTION
ESV
ECONOMIZER
TXV
LIQUIDLINE
SERVICE CONNECTION
OILSEPARATOR
RECEIVER
EVAPORATOR
CONDENSER
TXV
TXV BULB
SMV
ECONOMIZER TXV BULB
LOWSIDEACCESS VALVE
LIV
Figure 2-7 Refrigeration Circuit Schematic -- Economized Operation
LIQUID ECONOMIZER PRESSURE
TXV
TXV BULB
SMV
SUCTIONSERVICE
CONNECTION
USV
SUCTION
OILSEPARATOR
RECEIVER
ECONOMIZER TXV BULB
LIV
Figure 2-8 Refrigeration Circuit Schematic -- Unloaded Operation