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Correct position of electrodes and combustion head
ATTENTION: avoid the ignition electrodes to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler's
operation would be compromised. Check the electrodes position after any intervention on the combustion head.
To guarantee a good ignition the measures (in mm) shown on the next pictures must be observed. Be sure to tight the screw on the
electrodes group before reassembling the combustion head.
Replacing the ignition electrodes
ATTENTION: avoid the ignition electrodes to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler's
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
disconnect the electrodes cables;
3
remove the combustion head (see par. "Removing the combustion head");
4
loose screw (B) that fasten the ignition electrodes;
5
remove the electrodes and replace them, referring to the values quoted on Fig. 29.
Cleaning and replacing the detection photoresistor
When cleaning the photoresistive detector, always use a clean cloth. If necessary, remove it from its slot to replace it.
series 91-92:
5
series 93-5xx: 8 - 10
Fig. 29
33
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