User's Information
Proper Maintenance
AIR FILTERS
NOTE: Filters are NOT included with all Furnaces, how-
ever; the Furnace should never be run without a filter.
A clean filter saves money.
When the furnace circulates and filters the air in your
home, dust and dirt particles build up on the filter. Ex-
cessive accumulation can block the airflow, forcing the
unit to work harder to maintain desired temperatures.
And the harder your unit has to work, the more energy
it uses. So you pay more any time your system is run-
ning with a dirty filter.
Never operate your unit for either heating or cooling
with filters removed.
To clean or replace filters, remove blower access door,
remove the filter from the retaining brackets or retain-
ing wires. After cleaning, replace the filter in the same
manner making sure that the filter wire is secured in
place in both front and back filter retaining brackets or
retaining wires. Replace blower access door.
A bottom return air inlet as shown features a 17" x 25"
x 1" filter in the 17-1/2" wide furnace cabinets; a 20" x
25" x 1" filter in the 21" wide models; and a 24"x 25" x
1" filter in the 24-1/2" wide cabinet.
Help ensure top efficiency by cleaning the filter once a
month. Clean it twice a month during seasons when the
unitrunsmo oof on.
................................................................................You can clean the filter with a vacuum, OR you can wash
it with a household detergent.
Your filter may or may not be framed.
Replacing your filter.
When replacing your furnace filters, always use a high
velocity type which are the same size as originally sup-
plied. Filters are available fi'om your dealer.
Where disposable filters are used, they must be a high
velocity type which are the same size as originally sup-
plied.
How to remove your filter.
ELECTRIC SHOCK HAZARD
DISCONNECT POWER TO UNIT BEFORE REMOVING
BLOWER DOOR.
UPFLOW
BOTTOM RETURN
FILTER
_-_BLOWER RETAINER
ACCESS BRACKET
DOOR
FILTER Airflow
BLOWER
UPFLOW _ "_ACCESS
SIDE RETURN_ DOOR
For vertical UPFLOW ONLY, a left or right return air
inlet as above (left side shown) requires trimming of the
factory supplied filter to 17" x 25" x 1" for both the 21"
and 24-1/2" wide furnaces.
Air filters may also be located outside of the furnace us-
ing a SIDE FILTER FRAME.
Upflow furnaces use a high velocity type air filter which
may be located within the furnace blower compartment
in either a BOTTOM or SIDE (left or right) return air
inlet. The furnace may be secured with filter retaining
brackets (as shown) or a filter retainer wire.
6 32-5035-05
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