65
925.916.2 - GBINSTRUCTIONS PERTAINING TO THE INSTALLER
24.
boIler sChematIC
Figure 21
0803_2401 / CG_2036
heating domestic water gas domestic water heating
inlet outlet inlet return
Legende:
1 heating delivery cock
2 gas service cock
3 gas valve
4 boiler lling tap
5 heating return cock
6 pressure relief valve
7 manometer
8 boiler drain point
9 pump and air separator
10
NTC central heating return sensor
11 ue-water exchanger
12 ame detector electrode
13 main burner
14 ignition electrode
15 air/gas mixture header
16 mixer with venturi
17 gas diaphragm
18 fan
19 ue thermostat
20 coaxial tting
21 automatic air vent
22 expansion vessel
23 fumes header
24 105°C overheat thermostat
25 central heating NTC sensor
26 3-way valve motor
27 three-way valve
28 hydraulic pressure switch
29 automatic bypass
30 siphon
sealed chamber
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