Alpha E-Tec 25R - Page 36

36
Alpha E-Tec 15, 20, 25R - Routine Servicing
Fig. 7.4
1 Burner
2 Viewing window
3 Ignition/sensing electrode
4 Air supply pipe
5 Primary flow temperature sensor
6 Fan
7 Overheat thermostat
8 Boiler drain points
9 Gas injector
10 Gas valve
11 Condensate trap
12 Test points (air A, flue F)
13 Flue temperature sensor and thermal fuse
14 Four fixing nuts for item 15
15 Combustion chamber front assembly
16 Primary heat exchanger
17 Venturi
18 Primary return temperature sensor
19 Spark generator
AF
1
6
10
11
5
9
3
7
8
12
13
16
17
18
14
15
2
4
19