4.2
Main components
1 Air discharge connection, Ø160
2 Filter access hatch
3 Cover
4 Fan
5 Evaporator
6 Expansion valve
7 Control system
8 Control module
9 Housing for temperature sensor
10 Impressed current anode
11 Safety thermostat
12 Steatite immersion heater
13 Housing for temperature sensor
14 Cold water inlet
15 Condenser
16 Domestic hot water outlet
17 HP pressure switch
18 LP pressure switch
19 Pressure measurement point – High pressure (HP)
20 Compressor
21 Pressure measurement point – Low pressure (LP)
22 Air filter
23 Air intake connection, Ø160
24 Domestic air fitting, Ø80
25 Plug, Ø80
4.3
Operating principle
The thermodynamic water heater groups the domestic hot water tank and
controlled mechanical ventilation functions. The calories contained in the
air extracted from the building are used for the production of 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.1
M002826-G
9
13
14
15
16
23
22
20
8
17
18
21
19
10
11
12
5
4
6
7
1
2
3
25
24
4 Description of the product
16
TWH 200 EV
EN-7602142 - v11 - 24042019
