- 24 -
INST
ALLA
TION
TECHNICAL INFORMATION
4.2 Main diagram
Fig. 4.2
5
C.H. flow valve
6
D.H.W. outlet pipe
7
Gas inlet valve
8
D.C.W.
inlet valve
9
C.H.
return valve
11
Condensate drain pipe
12
Main circuit drain valve
13
C.H. pressure relief valve pipe
20
Flue temperature probe NTC and Safety
thermal fuse
21
C.H. temperature probe NTC
22
Condensing heat exchanger
23
Safety thermostat
24
Flame-detecting electrode
25
C.H. pressure relief valve
26
Automatic air purger valve
45
46
47
22
39
24
40
37
28
42
27
32
36
25
7
9
12
11
5
8
6
33
29
26
21
30
41
35
44
43
34
48
20
23
49
Summary of Contents for ADVANCE 25C
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