44
18.2.1 Removing the air gas assembly
1
.I
s
olate the gas supply to the boiler;
2. Carry out step 18.1.1;
3. Remove the silencer (Fig. 48);
18.2 Access to the Combustion Chamber
D
9. Remove the air gas assembly and
combustion chamber front (Fig. 56);
10. Reassemble in reverse order.
4
.
D
isconnect the detection electrode
cable (Fig. 49);
5
.
R
emove the earth cable from the
ignition electrode (Fig. 50), and
remove the ignition electrode cable
from the ignitor (Fig. 51)
6. Unplug the gas valve and fan
connectors (Figs. 52 and 53);
7. Unscrew the 6 nuts D on the
combustion chamber (Fig. 54);
8. Unscrew the gas valve nut E
(Fig. 55);
Fig. 48
Fig. 49
Fig. 50
Fig. 51
Fig. 52
Fig. 53
Fig. 54
Fig. 55
Fig. 56
E