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FAN ASSEMBLY
The unit must be disconnected from the power supply when cleaning the fans.
Fans can be cleaned with compressed air or by brushing them with soap and water or with a neutral
detergent.
Finish the cleaning by rotating the fan by hand to verify the absence of abnormal noises.
CLEANING FILTERS
The unit must NOT be running when the lters are removed to avoid drawing in outside air that
might be contaminated.
Filters need to be cleaned often and carefully. Usually, the compact lters (G4) can be cleaned two or
three times by vacuuming them with a vacuum cleaner, or by blowing them with compressed air before
replacing them. For replacement, refer to the control system signalling.
CORRECT FILTER AND PREFILTER INSTALLATION IN THE EVENT OF REPLACEMENT
Remove the old lters (see previous chapter), extract the new lters from the packaging (in which they are
supplied to avoid deterioration during transport and stay on site), insert them in the special containment
section, paying attention to their correct positioning.
Remove the lters from their packaging only when ready to install them to avoid getting them
dirty and contaminating them.
Make sure that the inside of the lter is not contaminated by external agents.
This operation should be carried out about one hour after the rst start-up of the unit, the period
during which the ducts are cleaned of dust and various debris. Proceeding in this way preserves
the ltering sections that cannot be regenerated.
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