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10 - AIR FILTER AND ACCESS
10.1 - Description
The 42BJ ULTRA is fitted with a high efficiency filter.
Fire rating medium M1, metal frame
Three filter access options are provided on the 42BJ:
• From above for units in false floor voids
• From below for units in false ceiling voids
• From the side for every installations
10.2 - Replacing the air filter
Air filters should be changed regularly. How often this is nee-
ded 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 pressu-
re drop, trapped dust particles may be given off and entrained
in the air supply, and the general performance of the ULTRA
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 the 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 inter-
nal metal housing.
NOTE:
When installing an ULTRA in a ceiling void, check that no
T-beams will obstruct access to the filter or prevent the plug-
in unit from being withdrawn.
DIRECTION OF AIR FLOW
FOAM GASKET