6
6
GW 512/1
fig. 3
2.4 Function diagram
1 Air duct
2 Flue gas duct
3 Fully modulating automatic gas
valve
4 Fully modulating fan
5 Fully modulating low NOx burner
6 Combustion chamber
7 Flame sensing electrode
8 High efficiency heat exchanger
9 Condensate trap
10 DHW heat exchanger
11 Boiler display
12 User control panel
13 DHW outlet
14 CH flow service valve
15 Gas service valve
16 Air pressure sensor
17 Ignition electrodes
18 Temperature sensors (NTCs)
19 Expansion vessel charging valve
20 Expansion vessel
21 Automatic bypass valve
22 Automatic air vent
23 Circulating pump
24 Diverter valve
25 Pressure gauge
26 Water section
27 Pressure relief valve
28 CH return service valve
29 Cold water shut off valve
