PART IV: MAINTENANCE
54
Replacing the ignition electrodes
Cleaning/replacing the electrodes
To remove the oil gun, proceed as follows:
1
remove the combustion head as described on the prevoius paragraph;
2
loosen the
VL
screw and remove the oil gun and the electrodes: check the oil gun, replace it if necessary;
3
after removing the oil gun, unscrew the nozzle and replace it if necessary;
4
in order to replace the electrodes, unscrew the
VE
fixing screws and remove them: place the new electrodes being careful to
observe the measures showed on pag.: reassemlbe following the reversed procedure.
Caution
: adjust the nozzle position according to the air pipe, by means of the
VU
screw, ance the
VL
screw is fastened.
ATTENTION:
avoid
the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), otherwise the boi-
ler’s operation would be compromised. Check the electrodes position after any intervention on the combustion head.
ATTENTION: avoid the electrodes to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler
operation would be compromised. Check the electrodes position after any intervention on the combustion head.
To replace the ignition electrodes, proceed as
follows:
1 remove the burner cover;
2 loose the nuts that fasten the electrodes
group to the combustion head (A);
3 disconnect the electrodes cables (B);
4 loose the security dowes of the adjusting ring
nut (C);
5 shift the electrodes group back to the outside
and remove the combustion head (D);
6 loose the screw of th eignition electrodes
support (E);
7 remove the electrodes and replace them
paying attention to the measures showed in
figure (F-G);
8 reassemble the burner by fllowing the
procedure in the reversed order.
A
B
C
D
E
F
To replace the electrodes, proceed as follows:
1 remove the burner cover
C;
2 disconnect the electrodes cables;
3 emove the combustion head referring to
paragraph “Removing the combustion head”;
4 unscrew
VE
screws that fasten the
electrodes (see next pictures)
5 remove the electrodes and replace them
referring to the measures indicated in the
previous paragraph;
6 reconnect the electrodes cables;
7 replace the combustion head;
8 replace the burner cover.
V
V
C
VU
VL
VE