4.2
Main components
1 Fan
2 Evaporator
3 Expansion valve
4 Solenoid valve for defrosting
5 Control system
6 Top domestic hot water temperature sensor
7 Impressed current anode
8 Safety thermostat
9 Steatite immersion heater
10 Cold water inlet
11 Air connection
12 HP pressure switch
13 LP pressure switch
14 Compressor
15 Pressure measurement point – High pressure (HP)
16 Ventilation grille
17 Domestic hot water outlet
18 Condenser
19 Middle domestic hot water temperature sensor
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.
Fig.3
MW-1000361-2
5
6
2
1
3
4
15
16
13
12
14
17
19
11
10
18
8
7
9
4 Description of the product
16
300026515 - v10 - 28082018
