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Installation instructions
Fig. 41 Space heating diagram
1
Hot water outlet
2
Cold water inlet
3
Pressure relief valve
4
Gas supply
5
Shut off gas valve
6
Thermal expansion tank (as required)
7
Atmospheric vacuum breaker
8
Cold inlet
9
Check valve
10
Pump
11
Thermostatic mixing valve
12
Thermometer (optional)
13
DHW outlet
14
Water to water heat exchanger
15
Backflow preventer
16
Automatic water feed
17
Thermostat
18
Space heating zone
19
Zone controller
20
Space heating pump
21
Expansion tank
22
Pressure relief valve
6720644887-02.1V
2
1
3
5
6
7
8
13
11
12
5
21
17
20
14
10
9
9
9
15
16
22
19
4
T
18
5