13
EN
5.4
Structure
10
13
12
11
9
1
2
3
6
5
7
4
8
13
14
15
16
17
1
Fan
2
Dual sensor (thermal safety/delivery)
3
Combustion chamber
4
Ignition/detection electrode
5
Diverter valve
6
System filling unit
7
Control panel
8
Gas valve
9
System relief valve
10
Boiler drain
11
System pump
12
Water pressure transducer
13
Automatic bleed valve
14
Burner
15
Primary heat exchanger
16
Expansion vessel
17
Smoke outlet
Fig. 9