PART IV: MAINTENANCE
41
To remove the combustion head, pull it out. Once removed, check that the air and gas holes are not obstructed. Clean the combustion
head by means of compressed air or scrape off the scale using a metallic brush
6.6
.
Adjusting the electrodes
Important Note: Check the ignition and detection electrodes after removing/adjusting the combustion head.
Electrodes position settings (RX75/RX75R)
Key
ER -
Detection electrode
EA -
Ignition electrode
The detection electrode must be aligned to the centre, as shown in the figure.
6.7 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.
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), other-
wise the boiler operation would be compromised. Check the electrodes position after any intervention on the
combustion head.
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.
Electrodes position settings R75A
Summary of Contents for R75A
Page 42: ...PART IV MAINTENANCE 42 RX75 RX75R Fig 32 R75A Fig 33 Detection electrode VB ...
Page 46: ......
Page 47: ......
