MAIN COMPONENTS
LEGEND
1
Hot water detector
3-way valve
2
Instantaneous water-heater
3
Manual air purge valve
4
5
Ignition electrodes
6
Expansion tank
7
Fumes fan
8
Fumes pressure switch
Total safety thermostat
9
10 Manual air purge valve
11 Gas valve
12 Heating detector
13 Automatic air purge valve
14 Electronic control unit
15 Circulating pump
16 Heating safety valve
17 By-pass
18 Filling cock
19 Lack of water pressure switch
20 Reset push-button with lock-out warning light
21 Hydrometer
22 Electric box
42