PART IV: MAINTENANCE
44
Replacing the electrodes
To replace the ignition electrodes, proceed as follows:
1
remove the burner cover
2
disconnect the electrodes cables;
3
loose the screw
VB
that fasten the electrodes group to the combustion head;
4
remove the electrodes and replace them paying attention to the measures showed in previous paragraph.
Reassemble the burner by fllowing the procedure in the reversed order.
,
WIRING DIAGRAMS
Refer to the attached wiring diagrams.
WARNING
1 - Electrical supply 230V / 400V 50Hz 3N a.c.
2 - Do not reverse phase with neutral
3 - Ensure burner is properly earthed
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), other-
wise the boiler’s operation would be compromised. Check the electrodes position after any intervention on the
combustion head.
Detection electrode
RX75, RX75S, RX75R
VB
R75A . P75A
R75R, P75R
Detection electrode
