Unigas G400A - Replacing the ignition electrodes; Replacing the detection electrode (natural gas burners)

PART IV: MAINTENANCE
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Replacing the ignition electrodes
Replacing the detection electrode (natural gas burners)To replace the detection electrode, proceed as follows:
1 remove the combustion head according to the procedure on paragraph “Removing the combustion head”;
2 by means of an allen key, loose the fixing screws of the detection electrode ER and replace it;
3 replace the combustion head.
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 electrode to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler operation
would be compromised. Check the electrode position after any intervention on the combustion head.
electrodes - type A
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 sup-
port (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 proce-
dure in the reversed order.
A
BC
DE F
ER
ER