Boiler Diagram - Baxi Luna 3 Silver Space Series Operating & Installation Instructions Manual

Figure 21
Legend:
1 NTC domestic hot water sensor
2 Water pressure switch
3 Powered three-way valve
4 Pressure gauge
5 Stopcock
6 Gas valve
7 Inlet pressure switch
8 Gas train with injectors
9 Central heating NTC sensor
10 Ignition electrode
11 Safety thermostat
12 Water-fumes exchanger
13 Fan
14 Venturi tube
INSTRUCTIONS FOR FITTERS

33. BOILER DIAGRAM

SEALED CHAMBER
CH DHW gas
delivery outlet
15 Positive pressure point
16 Negative pressure point
17 Air pressure switch
18 Fumes conveyor
19 Flame sensing electrode
20 Burner
21 Expansion vessel
22 System filling cock
23 Inlet electrovalve
24 Pump and air separator
25 Boiler drain cock
26 Water safety valve
27 DHW priority sensor with water filter and flow limiting device
28 Water-water plate heat exchanger
78
DHW CH
inlet return
(for model 310 Fi the positive pressure test point must be
closed)
925.523.1 - EN