27
installation
Water Circuit Diagram
Legend:
1. Fan
2. Main Heat Exchanger
3. Overheat Thermostat
4. Central Heating Flow Temperature Probe
5. Burner
6. Ignition Electrodes
7. Gas Valve
8. Secondary Exchanger
9. Safety valve
10. Domestic Hot Water Temperature Probe
11. Automatic By-pass
12. Drain valve
13. Central Heating Filter
14. D.H.W. Flow Switch
15. Diverter valve
16. Pressure Gauge
17. Modulating Circulation Pump with air release valve
18. Detection electrode
19. Expansion vessel
20. Central Heating Return Temperature Probe
21. Air Pressure Switch
A B
C
DE
1
3
2
4
9
11
10
12
13
14
15
16
17
19
18
20
21
8
5
7
6
A
C
E
1
3
2
4
11
9
12
16
13
17
19
18
20
21
5
7
6
Fig. 34 Fig. 35
A Central Heating Flow
B Domestic Hot Water Outlet
C Gas Inlet
D Cold Water Inlet
E Central Heating Return
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