Alpha E-Tec Plus 28NX - Page 54

Alpha E-Tec Plus 28NX, 33NX and 38NX - Routine Servicing
Fig. 7.9
1 Expansion vessel
2 Burner
3 Viewing window
4 Ignition/sensing electrodes
5 Air supply pipe
6 Pressure signal vent fitting
7 Primary flow temperature sensor
8 Fan
9 Condensate trap
10 DHW flow switch
11 Gas injector
12 Gas valve
13 DHW heat exchanger
14 Boiler drain point
15 DHW temperature sensor
16 Test points (air A, flue F)
17 Flue temperature sensor
18 Four fixing nuts for item 18
19 Combustion chamber front assembly
20 Primary heat exchanger
21 Venturi
22 Primary return temperature sensor
23 Primary pressure sensor
24 Automatic air vent
25 Boiler pump
26 3 bar safety valve
27 By-pass
28 Diverter valve
29 Safety valve operation indicator
30 Flue turret
2
7
13
14
15
12
6
10
11
1
4
5
8
9
3
AF
16
17
20
21
23
24
25
26
27
28
18
19
29
22
30
7.8 LOCATION OF BOILER COMPONENTS
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