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4.2
Main diagram
18
31
20
Fig. 4.2
5 C.H. flow valve
6 Gas inlet valve
7 C.H. return valve
9 Condensate drain pipe
10 Main circuit drain valve
11 C.H. pressure relief valve pipe
16 Flue temperature probe NTC and Safety
thermal fuse
TECHNICAL INFORMATION
36
37
32
29
24
33
25
28
9
6
35
34
16
19
17
22
23
27
21
10
7
17 C.H. temperature probe NTC
18 Condensing heat exchanger
19 Safety thermostat
20 Flame-detecting electrode
21 C.H. pressure relief valve
22 Automatic air purger valve
23 Pump
24 Gas valve
38
5
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