Typical Reversing Valve Components And Operation - Lennox XP25-024-230-01 Installation And Service Procedure

SOLENOID
TO COMPRESSOR
DISCHARGE LINE
LINE TO OUTDOOR
COIL
SUCTION LINE (TO
COMPRESSOR)
VAPOR LINE (TO SERVICE VALVE)
IMPORTANT - CONFIRM CORRECT CONNECTIONS OF
REFRIGERANT LINES TO REVERSING VALVE BEFORE
BRAZING IN VALVE.
STATUS CODE:
Diagnostic screen in room thermostat indicates when reversing valve is ON.
ERROR CODES:
There is no feedback from the reversing valve to the outdoor control therefore no error codes is displayed on the outdoor
®
control or iComfort Wi-Fi
shut down by other controls.)
IMPORTANT - ENSURE NEW REVERSING VALVE IS INSTALLED EXACTLY AS ORIGINAL
VALVE.
Figure 39. Typical Reversing Valve Components and Operation
room thermostat. (NOTE - If the reversing valve does not operate as designed, the system is
1. WHEN THE SOLENOID IS ENERGIZED (ON), THE
EVAPORATOR (INDOOR COIL – E) REFRIGERANT
PRESSURE IS DIRECTED TO THE SUCTION (S) BACK
TO THE COMPRESSOR.
2. WHEN THE SOLENOID IS DE-ENERGIZED (OFF),
REFRIGERANT PRESSURE IS DIRECTED FROM THE
CONDENSER (OUTDOOR COIL – C) TO THE SUCTION
(S) BACK TO THE COMPRESSOR.
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REVERSING VALVE
OPERATION
XP25