4.3 Operating principle
The thermodynamic water heater uses unheated ambient air or outdoor air
to prepare domestic hot water.
The refrigerant circuit is a closed circuit in which the R-134a refrigerant
plays the role of an energy carrier.
The heat from the intake air is transferred to the refrigerant in the finned
heat exchanger at a low evaporation temperature.
The refrigerant is drawn in, in vapour form, by a compressor which raises it
to a higher pressure and temperature and sends it to the condenser. In the
condenser, the heat extracted in the evaporator and some of the energy
absorbed by the compressor are released into the water.
The refrigerant is depressurised in the thermostatic expansion valve and
then cooled. The refrigerant can again extract the heat contained in the
intake air from the evaporator.
1
Compressor
2
LP pressure switch
3
Condenser
4
Domestic hot water tank
5
Heat exchanger (SPC 300S model)
6
Steatite immersion heater
7
Impressed current anode
8
Temperature controller (heat pump)
9
Limiting thermostat
10
Temperature controller (immersion heater)
11
Sensor tube
12
Filter-drier
13
Thermostatic expansion valve
14
Ambient air thermostat
15
Evaporator
16
Fan
17
Expansion valve bulb
18
HP pressure switch
19
Solenoid valve for defrosting
Fig.4
4 Description of the product
16 7734712 - v01 - 22052019
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