Boiler Schematic - Baxi LUNA 3 COMFORT AIR 250 Fi Manual Para El Usuario Y El Instalador

Figure 20
Key:
1 D.H.W. priority sensor
2 Water pressure switch
3 Three way valve
4 D.H.W. NTC sensor
5 Flow sensor with filter and water flow rate limiter
6 Three way valve motor
7 Gas valve
8 Expansion vessel
9 Ignition electrode
10 Central heating NTC sensor
11 Overheat safety thermostat
12 Flue-water exchanger
13 Flue hood
inStructionS Pertaining to the inStaller

31. boiler schematic

SealeD chamBer
heating domestic gas
inlet water outlet
14 Fan
15 Positive pressure point
16 Air pressure switch
17 Negative pressure point
18 Flame detector electrode
19 Burner
20 Burner injectors
21 D.H.W. plate heat exchanger (automatic by-pass)
22 Pump and air separator
23 System filling cock
24 Boiler drain point
25 Manometer
26 Pressure relief valve
71
310 Fi
domestic heating
water inlet return
(for 310 Fi model the positive point must be closed)
- GB
926.427.1