50
18.4.1 Removing the combustion chamber front panel
1.
Carry out step
18.2.1
;
2.
Unlock the three clamp locking bolts “
D
” and
remove the casing (see Figs. 18.16 and 18.17);
3.
Reassemble in reverse order.
D
Fig. 18.16
D
Fig. 18.17
18.4 Access to the Combustion Chamber
Fig. 18.18
Fig. 18.19
Fig. 18.20
18.4.2 Removing the air gas assembly
1.
Isolate the gas supply to the boiler;
2
. Carry out step
18.2.1
;
3.
Remove the silencer (Fig. 18.18)
;
9.
Remove the air gas assembly and
combustion chamber front (Fig. 18.26);
10.
Reassemble in reverse order.
4.
Disconnect the detection electrode
cable (Fig. 18.19);
5.
Remove the earth cable from the
ignition electrode (Fig. 18.20), and
remove the ignition electrode cable
from the ignitor (Fig. 18.21)
6.
Unplug the gas valve and fan connectors (Figs. 18.22 and 18.23);
7.
Unscrew the 6 nuts “
E1
” on the
combustion chamber (Fig. 18.24);
8.
Unscrew the gas valve nut “
E2
”
(Fig. 18.25);
Fig. 18.21
Fig. 18.23
Fig. 18.22
Fig. 18.25
Fig. 18.24
Fig. 18.26
E1
E2
