Operation Summer

Operation Summer cycle In summer operation, the 4-way valve is activated. The circuit followed by the refrigerant is shown in the relevant diagram. Winter cycle In the winter cycle, the discharge gas goes to the indoor coil, which acts as the condenser. The outdoor coil becomes the evaporator. The 4-way valve is not activated. The circuit followed by the refrigerant is shown in the relevant diagram. Operating sequences (See relevant wiring diagrams) Summer cycle: Thermostat in COOL position 1) The 4-way valve is activated through the thermostat, permitting the refrigerant to circulate in the summer circuit. 2) If the fan operating mode in the ambient thermostat is in FAN ON, the contactor is activated and the fan functions continuously. 3) With the logic module timing, the unit will start up after 5 minutes. 4) When the thermostat contact connects, the contactor is activated and the compressor starts up. If the fan operating mode is in the normal position, the contactor is activated through the thermostat's cooling circuit and the fan starts up. 5) The unit will function intermittently in response to the