1 .5
MAIN COMPONENTS (fig . 3 - fig . 3/a)
"25 OF" model
7
8
9
10
11
12
KEY
1 Control panel
2 Circulation pump
3 Air relief valve
4 Burners
5 Expansion vessel
6 C . H . sensor (SM1/SM2)
7 Smoke stat
8 Smoke chamber
9 Bithermal exchanger
10 Ignition/detection electrode
11 D .H .W . sensor (SS)
12 Gas valve
6
5
4
3
2
1
Fig . 3
69
IT
ES
ENG