Boiler Schematic - Baxi Luna HT Installers And Users Instructions

26.1 Boiler schematic

LUNA HT 280 - HT 330
heating domestic water
inlet outlet
Figure 20
Legenda:
1 heating delivery cock
2 gas service cock
4 boiler filling tap
4 cold water inlet on/off valve and filter
5 heating return cock
6 DHW NTC sensor / water heater NTC sensor
7 DHW priority sensor
8 check valve
9 flow sensor with filter and water flow rate limiter
10 hydraulic differential pressure sensor microswitch
11 manometer
12 pressure relief valve
13 boiler drain point
14 pump and air separator
15 automatic air vent
16 plate-type DHW heat exchanger
17 gas valve
18 flue-water exchanger
19 flame detector electrode
gas domestic water heating
inlet return
20 main burner
21 ignition electrode
22 air/gas mixture header
23 mixer with venturi
24 gas diaphragm
25 fan
26 flue thermostat
27 coaxial fitting
28 automatic air vent
29 expansion vessel
30 fumes header
31 siphon
32 105
33 central heating NTC sensor
34 3-way valve motor
35 diverter valve assembly
36 hydraulic differential pressure sensor
37 automatic bypass
31
°
C overheat thermostat