Baxi ECO4S 24 F Operating And Installation Instruction page 29

Figure 19
Legend:
1 Pump and air separator
2 Pressure gauge
3 Heating circuit extractable filter
4 Boiler filling tap
5 Check valve on automatic by-pass
6 Water pressure switch
7 Boiler drain tap
8 Safety valve
9 Gas valve
10 Gas train with injectors
11 Central heating NTC sensor
INSTRUCTIONS FOR FITTERS
Heating Gas
delivery
12 Ignition / flame detection electrode
13 Safety thermostat
14 Water-fumes exchanger
15 Fumes conveyor
16 Fan
17 Venturi tube
18 Positive pressure point
19 Negative pressure point
20 Air pressure switch
21 Burner
22 Expansion vessel
29
&
DHW Heating
inlet return
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