ID.: 17-16-20-2976-06 | 6.2017
13
3.3 Operating principle
5
6
4
8
3
10
1
2
9
1 Compressor
6 Fan
2 Condenser
8 Temperature sensor for the expansion valve
3 Dehydrator
9 Electric heater
4 Expansion valve
10 Buffer tank for DHW (boiler)
5 Evaporator
The cooling system of the device is a closed circuit system with the heat exchange liquid
R134A. At lower pressure and temperature (i.e. 10 °C) the coolant is evaporated in the
evaporator and thus removes heat from the air. Afterwards, the compressor compresses
the coolant to a higher pressure, this results in the raising of the coolant temperature to a
level higher than the water temperature in the buffer tank for DHW. The coolant then
releases the heat in the condenser into the water and condenses as a result. With the
expansion of the coolant the pressure and temperature in the coolant fall to their initial
level, completing the circular process. This process is repeated throughout the device’s
operation.
