Unigas K890A, Руководство по установке, использованию и обслуживанию

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PART IV: MAINTENANCE
41
Center head holes gas flow regulation (LPG burners)
To adjust the gas flow, partially close the holes, as follows:
1
loosen the three V screws that fix the adjusting plate D ;
2 insert a screwdriver on the adjusting plate notches and let it move CW/CCW as to open/close the holes;
3 once the adjustmet is performed, fasten the V screws.
The adjusting plate correct position must be regulated in the plant during the commissioning.
As far as the plate adjustments, insert a 1,5mm (R9x), 1.4mm (R515, R525), mm sized rod iron and close as shown on the next pictures.
Electrodes Adjustment
Important Note: Check the ignition and detection electrodes after removing/adjusting the combustion head.
Adjust the electrodes position, according to the quotes shown othe next picture
Cleaning/replacing the electrodes
To remove the oil gun, proceed as follows:
1
remove the combustion head as described on the prevoius paragraph;
2 loosen the VL screw and remove the oil gun and the electrodes: check the oil gun, replace it if necessary;
3 after removing the oil gun, unscrew the nozzle and replace it if necessary;
4 in order to replace the electrodes, unscrew the VE fixing screws and remove them: place the new electrodes being careful to
observe the measures showed on pag.: reassemlbe following the reversed procedure.
Key
1 Inlet
2 Return
3 Gun opening
E Oil piping connections
H Cover
L
Oil gun
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.
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.
H
E
1 2 3
L
G
V
V
D
A:
opened holes
B:
closed holes
B
A
7
A
B
A = 4
B = 8