Baxi Fourtech Series Operating And Installation Instructions page 62

Figure 20
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
INSTRUCTIONS FOR FITTERS
1.24 - 1.14
Heating Gas
delivery
62
DHW Heating
inlet return
10 Gas train with injectors
11 Central heating NTC sensor
12 Ignition / flame detection electrode
13 Safety thermostat
14 Water-fumes exchanger
15 Fumes conveyor
16 Fumes thermostat
17 Burner
18 Expansion vessel
926.116.5 - en