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INSTRUCTIONS FOR FITTERS
1.24 F - 1.14 F
Legend:
1
Water pressure switch
2
Automatic by-pass
3
Gas valve
4
Gas train with injectors
5
Central heating NTC sensor
6
Ignition / flame detection electrode
7
Safety thermostat
8
Water-fumes exchanger
9
Fumes conveyor
10
Fan
11
Venturi tube
12
Positive pressure point
13
Negative pressure point
14
Air pressure switch
15
Burner
16
Expansion vessel
17
Pump and air separator
18
Boiler drain tap
19
Pressure gauge
20
Safety valve
Figure 19
Heating
delivery
Gas
DHW
inlet
Heating
return
CG_2106 / 1001_2203