Page 61
XP25
TO COMPRESSOR
DISCHARGE LINE
LINE TO OUTDOOR
COIL
SUCTION LINE (TO
COMPRESSOR)
VAPOR LINE (TO SERVICE VALVE)
SOLENOID
IMPORTANT
- CONFIRM CORRECT CONNECTIONS OF
REFRIGERANT LINES TO REVERSING VALVE BEFORE
BRAZING IN VALVE.
IMPORTANT
- ENSURE NEW REVERSING VALVE IS INSTALLED EXACTLY AS ORIGINAL
VALVE.
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.
REVERSING VALVE
OPERATION
Figure 39. Typical Reversing Valve Components and Operation
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
®
room thermostat. (
NOTE - If the reversing valve does not operate as designed, the system is
shut down by other controls.
)
