25
926.323.1 - GB
INSTRUCTIONS FOR FITTERS
32. FUNCTIONAL CIRCUIT DIAGRAM
24 F
Figure 17
Legend:
1 Pump and air separator
2 Three-way valve
3 Three-way valve motor
4 Pressure gauge
5 Heating circuit extractable lter
6 Boiler lling tap
7 Cold water extractable lter
8 DHW priority sensor
9 NTC domestic hot water sensor
10 Check valve on automatic by-pass
11 Water pressure switch
12 Boiler drain tap
13 Safety valve
14 Water-water plate heat exchanger
15 Gas valve
16 Gas train with injectors
17 Central heating NTC sensor
18 Ignition / ame detection electrode
19 Safety thermostat
20 Water-fumes exchanger
21 Fumes conveyor
22 Fan
23 Venturi tube
24 Positive pressure point
25 Negative pressure point
26 Air pressure switch
27 Burner
28 Expansion vessel
0809_0202 / CG_2082
Heating
delivery
DHW
outlet
Gas DHW
inlet
Heating
return
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