Technical information

50
18.5.1 Removing the spark generator
1. Carry out step 18.2.1 ;
2. Open the control box by pushing on the 2 right clips as in
s
tep
1
8.3.1
F
ig 18.6;
3. Disconnect electrical connections “N1” on the P.C.B. (see Fig.
18.42)
;
4. Disconnect the electrodes wires “N2” and remove the screw
“
N3” (see Fig. 18.43) ;
5. Remove the spark generator by pulling it toward the right
(see Fig.18.43);
6. Reassemble in reverse order.
1
8.5.2 Removing the gas valve
Important. ensure gas supply to boiler is turned off
1.
Carry out step 18.2.1 ;
2
.
R
emove the spark generator by only removing the screw
“
N
3
”
and pull it toward the right as in
F
ig.18.43
;
3. Disconnect the wires from the modulator coil “O1”(see Fig.
18.44)
;
4. Undo the 2 gas pipe nuts “O2” (spanner 30) and the nut
“
O3” securing the gas valve from the combustion chamber
(see Fig.18.45);
5. Pull the gas valve toward you (see Fig.18.46);
6. Reassemble in reverse order replacing the gaskets.
Fig. 18.46
Fig. 18.45
Fig. 18.44
Fig. 18.42
N1
Fig. 18.43
N2
N3
O1
O2
O3
18.5 Access to the Gas Valve