1.4
Structure
1
2
3
4
5
6
7
8
Fan
1
Dual sensor (thermal safety/delivery)
2
Combustion chamber
3
4
Ignition/detection electrode
Diverter valve
5
System filling unit
6
Domestic hot water sensor
7
Control panel
8
Secondary heat exchanger
9
Gas valve
10
Domestic water filter and flow regulator
11
System relief valve
12
Boiler drain
13
System pump
14
Water pressure transducer
15
Automatic bleed valve
16
Burner
17
Primary heat exchanger
18
Expansion vessel
19
Smoke outlet
20
74
20
9
10
19
18
17
16
15
12
11
EN
16
14
13
Fig. 2