52
EN
5.4
Structure
21
22
23
24
25
26
13
14
15
16
18
19
20
17
5
1
2
3
4
6
9
10
11
12
8
7
27
28
1
Combustion chamber door
2
Oversleeve
3
Flame viewing window
4
Ignition/detection electrode
5
Heat exchanger
6
Heat safety thermostat
7
Air-gas mixer
8
Delivery sensor
9
Condensate siphon
10
Diverter valve
11
System filling unit
12
Domestic hot water sensor
13
Control panel
14
Domestic hot water heat exchanger
15
Gas valve
16
Domestic hot water filter
17
System relief valve
18
Boiler drain
19
System pump
20
Pressure transducer
21
Automatic bleed valve
22
Fan
23
Expansion vessel
24
Air inlet pipe
25
Air-smoke chamber
26
Smoke flue gas probe
27
Air inlet
28
Smoke outlet
Fig. 12
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