Reversing Valve Operation - Whirlpool ATE0743SPP Technical Manual

PILOT VALVE SOLENOID
DE-ENERGIZED (COOLING)
The operation of the reversing valve is gov-
erned by the pilot solenoid coil. There are two
small lines going to the pilot valve, and two
lines going from the pilot valve to the main
valve body. With the solenoid de-energized,
the direction of flow is as shown, and the valve
is in the cooling mode.
PILOT VALVE SOLENOID
ENERGIZED (HEATING)
When the solenoid is energized, refrigerant
flow from the suction and discharge lines is
redirected (reversed) through the pilot valve to
opposite ends of the main valve body. This
reverse in flow (pressure) causes the main
slide in the valve body to shift to the opposite
end, and reverses the flow of the entire system.
This reversed direction of refrigerant flow is
maintained as long as the pilot solenoid is
energized.

Reversing Valve Operation

TO EVAPORATOR
TO EVAPORATOR
3-4
PILOT VALVE
(SOLENOID DE-ENERGIZED)
DISCHARGE LINE
PILOT VALVE
(SOLENOID ENERGIZED)
DISCHARGE LINE
SUCTION LINE
TO CONDENSER
SUCTION LINE
TO CONDENSER