Functional Circuit Diagram - Baxi Nuvola 3+ BS40 Operating And Installation Instructions

35. FUNCTIONAL CIRCUIT DIAGRAM

DHW DHW
outlet inlet
Figure 17
Key:
1 heating filter
2 pressure gauge
3 powered 3-way valve
4 gas valve
5 heating circuit pump with deaerator
6 boiler filling tap
7 gas train with injectors
8 flame detection electrode
9 fumes conveyor
10 fumes thermostat
11 water-fumes exchanger
12 flame ignition electrode
13 burner
14 safety thermostat
INSTRUCTIONS FOR FITTERS
heating delivery
15 NTC heating probe
16 NTC domestic hot water sensor
17 sacrificial anode
18 storage boiler
19 heating circuit expansion vessel
20 DHW circuit pump
21 storage boiler drain tap
22 DHW circuit safety valve
23 DHW circuit expansion vessel (accessory)
24 boiler safety valve
25 boiler drain tap
26 hydraulic pressure switch
27 check valve on automatic by-pass
28 plate exchanger
53
heating return gas inlet
7217402.01 - en