M039150CF
39
Cleaning/replacing the electrodes
To clean/replace the electrodes, proceed as follows:
1
remove the combustion head as described in the previous paragraph;
2
remove the electrodes ass.y and clean them;
3
in order to replace the electrodes, unscrew the
VE
fixing screws and remove them: place the new electrodes being careful to
observe the measures in the previous paragraph; reassemble the electrodes and the combustion head following the reversed pro-
cedure.
.
Adjusting the electrodes position
To adjust the electrodes position with respect to the combustion head, slacken the screw
VE
and move the oil lance as necessary. At
the end of settings check the electrodes position and tighten the screw
VE
.
Fig. 39
Check the detection current
To check the ionization current follow the diagram in Fig. 40. If the current intensity is not in the recommended range, check contacts, if
the combustion head is dirty and the UV detector position, replace it if necessary.
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.
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.
Fig. 40
VE
VE
1
0
9
÷
6÷7
3
÷
4
Control box
Minimum detection signal
Siemens LME21-22
200 µA
Photocell connector
1 = +FC
2 = -FC
