18
and cannot be serviced separately; replace the entire core
body if necessary. Service tools are available from RCD
that allow the replacement of the check valve core without
having to recover the entire system refrigerant charge.
Apply compressor refrigerant oil to the check valve core’s
bottom o-ring. Install the fitting body with 96 ±10 in-lbs
of torque; do not over- tighten.
OUTLET
INLET
PUSHRODS
DIAPHRAGM
NEEDLE
VALVE
SPRING
DISTRIBUTOR
FEEDER TUBES
CAPILLARY TUBE
COIL
BULB
EXTERNAL EQUALIZER TUBE
C150325
Fig. 20 − Thermostatic Expansion Valve (TXV) Operation
TXV SENSOR
BULB
CLAMP
CIRCUIT 1
CIRCUIT 2
TXV
(CIRCUIT 2)
TXV
(CIRCUIT 1)
TXV SENSOR
BULBS
TXV
SENSOR
BULBS
C12557
Fig. 21 − TXV Sensor Bulb Locations
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