9
4
Technical information
4.1
Overview
23
16
31
32
27
18
22
29
24
19
14
25
26
28
33
17
30
21
20
34
15
Fig. 4.1
10 C.h. return valve
11 Gas inlet valves
12 Condensate drain pipe
13 C.h. flow valve
14 Condensing heat exchanger air purger valve
15 C.h. temperature probe NTC
16 Condensing heat exchanger
17 Safety thermostat
18 Flame---detecting electrode
19 Transformer
20 Air manifold
21 C.h. pressure relief valve
22 Automatic air purger valve
23 Main circuit drain valve
24 Pump
25 Pump vent plug
26 Gas valve
27 Primary circuit flow switch
28 Condensate trap
29 Fan
30 Spark generator
31 Ignition electrodes
32 Burner
33 Flue temperature probe NTC
34 Safety thermal fuse
35 Gas valve inlet pressure test point
36 Gas valve outlet pressure test point
37 C.h. expansion tank
38 By---pass valve
39 Flue outlet pipe
40 Air intake pipe
41 Flue exhaust sampling point
42 Air sampling point
IN
S
TA
LLA
TI
O
N