Unigas G18 SP, Manual

Page: 13 / 32

PART III: MAINTENANCE MANUAL 13
At least once a year carry out the maintenance operations listed below. In the case of seasonal servicing, it is recommended to
carry out the maintenance at the end of each heating season; in the case of continuous operation the maintenance is carried out
every 6 months.
z
PERIODICAL SERVICING
z
Clean and examine the oil filter cartridge and replace it if necessary;
z
Examine the condition of the oil flexìble pipeworks and check for possible leaks;
z
Clean and examine the filter inside the oil pump;
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Dismantle, examine and clean the combustion head. When reassembling respect the measures reported in Tab. 9;
z
Esame elettrodi di accensione e relativi isolatori in ceramica, pulizia, eventuale registrazione e se necessario, sostituzione
vedere Fig. 18.
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Dismantle and clean the oil nozzle (important: use solvents for cleaning and not metal utensils).
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At the end of the maintenence procedures replace the burner, light it and check the shape of the flame:if in doubt replace
the nozzle(s);
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Where the burner is used intensively it is recommended to replace the nozzles at the beginning of the operating season;
z
Examine and carefully clean the flame detector cell and replace if necessary. If in doubt light the burner and check the
detector circuit as shown in Fig. 19.
Correct posiotion of electrodes and combustion head - G18 SP
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Prepare a stable surface where lying the burner during maintenance.
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To gain access to the combustion head and to the nozzles, loose the screw which lock the blast tube and remove it from the
part that remains fixed to the boiler.
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To guarantee a good ignition, respect the measures indicated in Tab. 3.
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Be sure to lock the screw that fix the electrodes group, before reassembly the burner.
WARNING: All operations on the burner must be carried out with the mains disconnected!
Removal of the combustion head - PG25 SP - PG30 TN
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Remove the cap C.
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Take out the photoresistance from its housing.
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Unscrew the floating pipe-fitting E from the oil pipe, using 2
spanners, to avoid to loose the pipefirrings from the distribu-
tion block;.
z
Remove the screws V and unscrew the screw VRT until the
threaded rod AR is free;
z
Remove the complete assembly as shown in Fig. 17a.
Note: To re-assemble reverse the order of procedures descibed
above.
Fig. 17a
Fig. 17b
PART III: MAINTENANCE MANUAL
VRT
AR
C
R
E