Boiler Components - Immergas HE COMBI INTERNAL Manual

1.17 BOILER COMPONENTS.

GAS DHW
Key:
1 - Negative signal pressure point
2 - Positive signal pressure point
3 -
4 - Flue safety thermostat
5 - Flue pressure switch
6 - Fan
7 - Condensate control level probe
8 - Sealed chamber
9 - Combustion chamber
10 - Boiler pump
11 - System pressure switch
12 - Domestic hot water probe
13 - Gas valve
14 -
15 - Manometer
N.B.:
Schematic shown here is of HE 30 COMBI INTERNAL.
e HE 30 COMBI EXTERNAL has identical component layout.
RETURN FLOW
COLD
INLET
13
16 -
Condensing heat exchanger
17 - Flow probe
18 - Safety thermostat
19 - Flue hood
20 - Primary heat exchanger
21 - Ignition and detection electrodes
22 - Burner
23 - Air vent valve
24 - System expansion vessel
25 - 3 bar safety valve
26 - DHW heat exchanger
27 - 3-way valve (motorised)
28 - Condensate drain trap
29 - By-pass
30 - System draining valve
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