Unigas IDEA Series, Manual, Page: 26 / 48

PART III: MAINTENANCE MANUAL
26
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.
PLEASE, READ CAREFULLY “WARNINGS” CHAPTER, AT THE BEGINNING OF THIS MANUAL.
ROUTINE OPERATIONS
z
Inspection and cleaning of the light oil filter cartdrige; replace it if necessary.
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Check the overall condition of the flexible light oil hoses and make sure there are no signs of leakage;
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Inspection and cleaning of the filter inside the light oil pump: filter must be thoroughly cleaned at least once in a season to
ensure correct working of the fuel unit. To remove the filter, unscrew the four screws on the cover. When reassemble, make
sure that the filter is mounted with the feet toward the pump body. If the gasket between cover and pump housing should be
damaged, it must be replaced.
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Disassembly, inspection and cleaning of the combustion head. Respect the measurements listed on pag. 31 carefully
during re-assembly.
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Inspection and cleaning of ignition electrodes (pag. 29) and respective ceramic insulators: clean, adjust, and replace if
necessary.
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Disassemble and clean the light oil nozzles (pag. 29).
IMPORTANT: cleaning must be performed using solvent, not metal tools!
At the end of maintenance operations after first reassembling the burner, light the flame and check its shape, replacing the noz-
zle whenever a questionable flame shape appears. Whenever the burner is used intensely, we recommend preventively repla-
cing the nozzle at the start of each heating season;
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Inspect and thoroughly clean the flame detection photoresistor and replace if necessary. In case of doubt, check the detec-
tion current after first starting the burner by following the procedure illustrated in Fig. 69.
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Clean and grease levers and rotating parts.
WARNING: All operations on the burner must be carried out with the mains disconnected!
Removing the combustion head
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Remove the burner’s cover by unscrewing the fixing
screws.
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Slacken the light oil pipes T1 and T2 from the pump (Fig.
50).
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Disconnect the ignition cables CA1 and CA2 from the
transformer TA (Fig. 51).
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Remove the 4 screws V1 - V4 shown in Fig. 53.
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Disconnect the connector CE fron the solenoid valve EV2
ATTENTION: the screw V1 is longer than the other
and must be replaced in the same position!
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Withdraw the photoelectric cell FR from its housing (Fig.
54).
ATTENTION: avoid to withdraw the photoelectric cell
drawing its cable!
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Remove the combustion head from its housing as shown
in Fig. 55.
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Clean the combustion head by a compressed air blow or,
in case of scale, scrape it off by a scratchbrush.
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Replace the combustion head.
z
Replace the burner’s cover.
Fig. 50
PART III: MAINTENANCE MANUAL
T
T1
T2