Circuit Diagram - Baxi Mainfour 24-24F Operating And Installation Instructions

Figure 17
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
INSTRUCTIONS FOR FITTERS
29. FUNCTIONAL CIRCUIT DIAGRAM
Heating DHW
delivery outlet
24 F
Gas DHW Heating
inlet return
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
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71.07144.01 - EN