Duovalve, function - GF83.20-P-2100-01I

Function 

The duovalves for the automatic air conditioning are controlled directly by the automatic A/C pushbutton control module using on/off control and control the coolant flow through the heater core separately for the left and right side. The closing and opening times of the duovalves per cycle depend upon the deviation between the actual temperature and the set temperature.

Control principle 

The electro magnetic coil in the duovalves is actuated by the automatic A/C pushbutton control module. This allows the hot water quantity flowing through the heater core to be controlled separately for the left and right side. The duovalves are open when not under power.

Control of duovalves by automatic A/C pushbutton control module