Carrier 50TC*17 Series Service And Maintenance Instructions page 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.
TXV SENSOR
BULBS
CIRCUIT 2
DIAPHRAGM
PUSHRODS
FEEDER TUBES
INLET
OUTLET
NEEDLE
VALVE
SPRING
DISTRIBUTOR
Fig. 20 − Thermostatic Expansion Valve (TXV) Operation
Fig. 21 − TXV Sensor Bulb Locations
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.
CAPILLARY TUBE
COIL
EXTERNAL EQUALIZER TUBE
CLAMP
TXV SENSOR
BULB
TXV
(CIRCUIT 1)
18
BULB
TXV
SENSOR
BULBS
TXV
(CIRCUIT 2)
CIRCUIT 1
C150325
C12557