9
Filters must be inspected, cleaned or changed every two
months or as required. It is the owner's responsibility to keep
air filters clean. NOTE: Dirty filters are the most common
cause of inadequate heating or cooling performance.
Upflow Filters (Not Included With Furnace)
To remove the filter contained in the furnace retaining rails,
disconnect electrical power to the furnace and remove the
two front panels, top panel first.
Grasp the lower portion of the filter, lift up to disengage it
from the lower railing, move towards blower, drop filter down.
Pull filter outward. (Figure 9)
Front of Furnace
Blower
Grab Here
And Lift
Filter
Front of Furnace
Blower
1. Lift filter above bottom 2. Tilt filter to clear rail.
rail.
Front of Furnace
Blower
Front of Furnace
Blower
3. Lower filter below top 4. Pull filter out.
rail.
Figure 9
Filter Removal
Use a vacuum cleaner to clean out the blower area and the
adjacent area of the return air duct.
Some installations will have throwaway filters. If dirty, these
filters must be thrown away and replaced with two new simi-
lar size throwaway filters. Other installations will have per-
manent filters. If dirty but not torn, these filters must be
cleaned as follows:
Wash, rinse, and dry a permanent filter. Both sides of a metal
filter should be sprayed with a dust adhesive as recom-
mended on the adhesive container. Spray adhesives for use
with permanent metal filters can be found at some hardware
stores.
If badly torn or uncleanable, these filters must be replaced
with permanent filters of the same type and size.
Reinstall filter by placing it into the furnace along the side of
the blower. Engage filter in top rail, move toward side of
furnace and drop it into the bottom rail. BE SURE AIRFLOW
DIRECTION ARROW POINTS TOWARDS THE BLOWER.
When the filter is located in the bottom of the furnace on a
bottom return system the filter is held in place by a sheet
metal retainer strap (Figure 10). To change and clean the
filter, slide one end of the retainer towards the front and
remove filter. Follow cleaning or replacement instructions
given above.
Figure 10
Filter Retainer
Counterflow Filters (Not Included With Furnace)
This manual discusses the furnace mounted filter rack which
is shipped with the furnace. Other filter arrangements could
have been used.
Figure 11
Counterflow Furnace Mounted Filter Rack
Remember dirty filters are the most common cause of inad-
equate heating or cooling performance.
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