Baxi Nuvola 3 Comfort Operating And Installation Instructions page 36

DHW outlet DHW inlet
Figure 20
Legend :
1 boiler
2 boiler probe
3 DHW exchanger
4 expansion vessel
5 Boiler drain tap
6 Central heating NTC sensor
7 Safety thermostat
8 Ignition electrode
9 Water-fumes exchanger
10 Fumes conveyor
11 Negative pressure point
12 Positive pressure point
13 Concentric ad
14 Air pressure switch
15 fan
16 flame detection electrode
17 Gas train with injectors
INSTRUCTIONS FOR FITTERS
140 Fi - 240 Fi - 280 Fi - 320 Fi
Heating return
18 safety valve on heating circuit 3 bar
19 differential hydraulic pressure switch
20 automatic air vent
21 pump with air separator
22 gas valve
23 heating return filter
24 automatic by-pass
25 gas tap
26 Pressure gauge
27 burner
28 Three-way valve
29 Three-way valve motor
30 Boiler filling tap
31 safety valve on DHW circuit 8 bar
32 storage boiler drain tap
33 flow adjuster
34 water supply tap
36
Heating delivery Gas
C607215 - GB