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20. boiler scheMatic
Figure 19
Key:
1 Water pressure gauge
2 Siphon (condensate)
3 Central heating ntc sensor
4 105°C overheat safety thermostat
5 Gas valve
6 Heat exchanger
7 Flame detector electrode (ionisation probe)
8 Burner
9 Ignition electrode
10 Mixer with venturi
11 Gas injector
12 Fan
13 Flue joint
14 Automatic air vent
15 Hydraulic pressure sensor
16 Boiler drain point
17 Joint flue with flue thermostat
18 Flue thermostat
19 Gas pressure switch
20 Seat of air intake pipe
InstructIons pertaInInG to the InstaLLer
912.823.1 - GB
37
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