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71.07144.01 - EN
INSTRUCTIONS FOR FITTERS
29. FUNCTIONAL CIRCUIT DIAGRAM
24 F
Legend:
1
NTC domestic hot water sensor
2
Boiler drain tap
3
Boiler filling tap
4
Water pressure switch
5
Gas valve
6
Gas train with injectors
7
Water-fumes exchanger
8
Fumes conveyor
9
Fan
10
Positive pressure point
11
Negative pressure point
12
Air pressure switch
13
Central heating NTC sensor
14
Safety thermostat
15
Ignition / flame detection electrode
16
Burner
17
Expansion vessel
18
Pump and air separator
19
Pressure gauge
20
Safety valve
21
Automatic by-pass
22
DHW priority sensor
Figure 17
CG_2110 / 0902_0607
Heating
delivery
DHW
outlet
Gas
DHW
inlet
Heating
return
Содержание Mainfour 24-24F
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