18
1- 30
INSTALLERUSER
MAINTENANCE TECHNICIAN
Key:
1 - Sample points (air A) - (ue gases F)
2 - Sealed chamber
3 - Fan
4 - Combustion chamber
5 - Domestic hot water ow switch
6 - Gas valve
7 - Domestic hot water probe
8 - System lling valve
9 - Positive signal pressure point
10 - Negative signal pressure point
11 - Flue pressure switch
12 - Flow probe
13 - Flue hood
14 - Safety thermostat
15 - Primary heat exchanger
16 - Ignition and detection electrodes
17 - System expansion vessel
18 - Burner
19 - System pressure switch
1.22 BOILER COMPONENTS.
20 - Air vent valve
21 - Boiler pump
22 - Plate heat exchanger
23 - 3-way valve (motorised)
24 - System draining valve
25 - By-pass
26 - 3 bar safety valve
N.B.: connection group (Optional)
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