Electrodes Adjustment; Replacing The Electrodes - Unigas C70N US Manual Of Installation - Use - Maintenance

Electrodes Adjustment

Important Note: Check the ignition and detection electrodes after removing/adjusting 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.
Adjust the electrodes position, according to the quotes shown othe next picture
E120N M-

Replacing the electrodes

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.
Cleaning of detection and ignition electrodes:
1 Remove protective cover (1)
2 Disconnect the electrical cables (2) from the electrodes (it is not necessary to remove the cable glands, however, at the operator's
discretion)
3 Remove the entire electrode assembly with holder after unscrewing the screws securing the flange (3)
4 Only if necessary adjust the position of the electrode. Loosen the threaded connection securing the electrode to the holder (4)
5 Clean the electrode sensing element
6 Reinsert the entire electrode assembly following previous steps in reverse.
CAUTION: Ensure correct positioning of the electrodes before reinserting them on the burner (see section on electrode
adjustment for dimensions).
1
3
A
5
PART V: MAINTENANCE
EA: Ignition electrode
ER: Detection electrode
12 ÷ 14
12 ÷ 14
2
25
A
3
4
40
120
EA
3
ER
25
114