Routine Maintenance
CLCH-SVX010A-EN 79
Front Load Filters
Most filters in custom units are installed in unitary sheet
metal frames. Filters are secured with a metal clip. There
are several different styles.
To install filters:
1. Disconnect power to the unit.
2. Open or remove the filter clip.
3. Remove the filter from the rack.
4. Install new filters with the directional arrows pointing
in the direction of airflow.
5. Secure the filter using the appropriate clip for each
filter.
The filters are often installed in a pre/post filter
configuration. Be sure to note the order of installation.
Note: Filters must have an airtight seal to prevent air
bypass.
Side Load Filters
Most filters in custom units are installed in unitary sheet
metal frames. If unit is provided with side access rack, do
the following for installation:
2-inch or 4-inch Flat Side-Load Filters
1. Disconnect the power to the unit.
2. Open the filter section access door and remove the
filters and block-offs from their installed position.
3. Slide the filter into the rack.
4. Some side load racks will be provided with block-off
plates. Install them into the rack last before closing the
door.
5. Close and secure the door, making certain the door
closes snug against the block-off.
Cartridge or Bag Side-Load Filters
To replace cartridge or bag filters:
1. Disconnect all electrical power to the unit.
2. Remove the dirty filters and block-offs from their
installed position.
3. Keeping the new bag filters folded, slide each filter into
the filter rack, pushing them tightly against the unit.
Note: The pleats on bag filters should be in the vertical
position.
4. If using the optional pre-filters, replace them on the
appropriate filter rack.
5. If fixed and adjustable block-offs are provided with the
unit, slide the fixed block-offs into the filter track before
the adjustable block-off.
Note: The adjustable block-off should always be installed
last, next to the access door.
6. Close and secure the access door. If the door can be
closed without compressing the filter, adjust the block-
off by loosening its screws and position it to provide an
airtight seal.
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