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KAH Operation & Maintenance Guide
Page: 48 of 88
SECTION 3 - MAINTENANCE (CONTINUED)
MAINTAINING AND REPLACING FILTER
SEGMENTS
Every month, check the cleanliness of the filters, and if
necessary, replace them. Filters should be replaced when
the pressure drop, measured by a manometer, reaches
the prescribed limits for the installation.
Filter Types
Flat, angle, rigid, and bag are the typical filter types as
shown in Figure 56 (right). Filter frames, bulkheads, and
segment panels are factory sealed and must remain
sealed for NO air bypass.
Replacing the Filters
1. Check filter sizes and quantities. Refer to the filter
label located on each filter segment.
2. Remove filter frame end cover as shown in Figure 57
and 58 (right).
3. Remove old filters, if present.
4. Make sure gaskets at both ends of the side load filter
tracks are in place. The gaskets are normally found
on inside of filter frame end covers.
5. Slide the correct size new filters into tracks.
6. On bag filters (in FF segments), leave banding in
place until filters are installed; then remove. Install
the bag filters so that the pocket dividers are vertical
if the filters are over 12” high.
7. Airflow arrows must point downstream (in direction of
the airflow).
8. Install all pleated filters with pleats positioned
vertically.
9. Reinstall the filter frame end cover.
NOTE -
A list of filter part numbers, sizes and
quantities are shown on a label located on each filter
segment of each AHU.
FIGURE 56 - TYPICAL FILTERS
FIGURE 57 - INSTALLING ANGLE FILTERS
Filter
Filter
Frame
End
Cover
FIGURE 58 - INSTALLING SIDE LOAD FILTERS
Rigid
Filter
Pre
Filters
Filter
Frame
End Cover
