38
15 - MAINTENANCE
Air fi lters
● Depending on the installation conditions, the fi lter aspect must
be examined to defi ne the cleaning or replacing periodicity.
Spare parts should be planned for.
The pressure drop data of the technical catalogue are given for
clean fi lters. Cleaning the fi lters is very important to maintain
the required available pressure of the unit.
On units with a clogged fi lter diff erential pressure switch, an
alarm is triggered on the electronic control when the factory-set
clogging threshold is exceeded depending on the combination
of fi lters selected.
● G4 gravimetric fi lters (row 1). Cleaning can be done with a
household vacuum cleaner. Replace them periodically.
● F7 creased opacimetric fi lters (row 2). It is necessary to
replace them.
Filter removal:
● The fi lter holder structure is prepared for lateral (fi g. 15.1 and
15.2) or lower (fi g. 15.3 and 15.4) removal.
To remove the frames, unscrew the closing panels (Allen M4
screws) and remove the 2 screw knobs, located on either
side of the unit. Then separate the tensioner and remove the
frames from each row. Finally, remove the connecting parts
between the frames.
Screw
knob
Connecting part
between frames
Closing side
panel
fi g. 15.1
Removed the
closure side panel
Row 1 Row 2
fi g. 15.2
Screw
knob
Connecting part
between frames
Removed the closure
bottom panel
fi g. 15.3
Removed the
closure bottom
panel No.1
Row 2 Row 1
fi g. 15.4
Removed the
closure bottom
panel No.2
● In units with mixing box, the fi lter holder structure is located
inside the box. To access the filters, it is necessary to
disassemble the panels located on both sides of the box and
which are fi xed with Allen M4 screws.
Air fi lters
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