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4.2
Main diagram
Fig. 4.2
10 Condensate drain pipe
11 C.h. return valve
12 Gas inlet valve
13 C.h. flow valve
14 Fan
15 Air pressure sensor test points
16 Air pressure sensor
- 16 -
TECHNICAL INFORMATION
17
39
14
16
33
29
30
31
28
21
35
26
34
36
10
12
41
18
19
23
24
37
27
25
22
11
17 Flue temperature probe NTC
18 Condensing heat exchanger
19 Safety thermostat
20 C.h. temperature probe NTC
21 Condensate trap
22 Main circuit drain valve
23 Automatic air purger valve
40
20
38
13
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