Immergas MINI NIKE 3 E - Page 150

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1.14 BOILER COMPONENTS.
Fig. 1- 10
Key:
1 - Flue hood
2 - System pressure switch
3 - Boiler pump
4 - Domestic hot water ow switch
5 - Gas valve
6 - Domestic hot water probe
7 - System lling valve
8 - Flue safety thermostat
9 - Safety thermostat
10 - Primary heat exchanger
11 - Flow probe
12 - Combustion chamber
13 - Ignition and detection electrodes
14 - System expansion vessel
15 - Burner
16 - Vent valve
17 - DHW heat exchanger
18 - ree-way valve (motorised)
19 - System draining valve
20 - By-pass
21 - 3 bar safety valve
N.B.: connection group (optional)