Baxi Mainfour 24-24F Operating And Installation Instructions page 48

Figure 18
Legend:
1 Boiler drain tap
2 Boiler filling tap
3 Water pressure switch
4 Gas valve
5 Gas train with injectors
6 Water-fumes exchanger
7 NTC domestic hot water sensor
8 Fumes conveyor
9 Fumes thermostat
10 Central heating NTC sensor
INSTRUCTIONS FOR FITTERS
24
Heating DHW Gas
delivery outlet
DHW Heating
inlet return
11 Ignition / flame detection electrode
12 Burner
13 Expansion vessel
14 Safety thermostat
15 Pump and air separator
16 Pressure gauge
17 Safety valve
18 Automatic by-pass
19 DHW priority sensor
48
71.07144.01 - EN