Benchmark Alpha E-Tec Plus 28 - Page 41

Alpha E-Tec Plus 28, 33 and 38 - Routine Servicing
Fig. 7.6
2
12
7
13
6
11
14
15
16
19
20
21
22
23
24
25
26
27
1
4
5
8
9
10
AF
17
18
3
28
1 Expansion vessel
2 Burner
3 Viewing window
4 Ignition/sensing electrodes
5 Air supply pipe
6 Primary flow temperature sensor
7 Fan
8 Condensate trap
9 DHW flow switch
10 Gas injector
11 Gas valve
12 DHW heat exchanger
13 Boiler drain point
14 DHW temperature sensor
15 Test points (air A, flue F)
16 Flue temperature sensor
17 Four fixing nuts for item 18
18 Combustion chamber front assembly
19 Primary heat exchanger
20 Venturi
21 Primary return temperature sensor
22 Primary pressure switch
23 Automatic air vent
24 Boiler pump
25 3 bar safety valve
26 By-pass
27 Diverter valve
28 Safety valve operation indicator
41