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10 - REPLACING THE AIR FILTER
Air filters should be changed regularly. How often this is
needed depends on the cleanliness of the working environment
and the rate at which the filter becomes clogged.
If clogged filters are not changed they can increase the
pressure drop, trapped dust particles may be given off and
entrained in the air supply, and the general performance of the
ICM may be degraded as the air flow reduces.
NOTE:
The condensate drain pan is located at the suction end of the
fan, and could therefore overflow if the air filter became
clogged. This is because the partial vacuum inside the unit
could stop the condensate from draining normally.
10.2.1 - Access from the side
To access the filter, open the latch, open the hinged access
door and remove the filter from its housing by releasing the
two clips which hold it in place.
When replacing the filter, make sure that the sealing gasket is
against the internal metal housing.
10.2.2 - Access from above or below
In these situations the filter is installed in a removable plug-in
unit. To replace the filter assembly, disengage the two latches
and withdraw the plug-in unit. Remove the old filter and insert
a new one ensuring that the sealing gasket is against the
internal metal housing.
NOTE:
When installing an ICM in a ceiling void, check that no
T-bars will obstruct access to the filter or prevent the plug-in
unit from being withdrawn.