6
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in increase furnace
operating temperatures and shorten the life of the furnace.
Filters specified for the furnace are rated at a maximum of 600
FPM air velocity and sized for the furnace’s airflow rate.
Replacement filters must be of equivalent type, size, and rating
except as described below.
Disposable, low--velocity filters may be used to replace
washable, high--velocity filters, providing they are sized for
300 FPM or less.
If you are uncertain of the type of replacement filter to use,
consult the furnace installer or a qualified service agency for
assistance.
CAUTION
!
Filter Replacement -- Bottom or Side Mounted
Filter Rack Outside Furnace
1. Turn OFF electric power to furnace.
2. Remove the end cap from the filter rack.
3. Slide the filter out of the filter rack. See Fig. 4.
4. Inspect the filter(s) and replace or clean washable types. If
filter is aluminum mesh it should be recoated with filter
coating spray.
Filter Rack End Cap
A07690
Fig. 4 -- Filter Rack Outside Furnace
5. Reinstall the end cap in the filter rack.
6. Turn on electric power to furnace.
Filter Replacement -- Bottom Mounted Filter
Inside Furnace
1. Turn off electric power to furnace.
2. Remove blower door.
3. Slide filter straight out toward you. See Fig. 5.
4. Inspect the filter(s) and replace or clean washable types. If
filter is aluminum mesh it should be recoated with filter
coating spray.
5. Replace blower door.
6. Turn on electric power to furnace.
9
″
Center Clip
side--to--side
(228.6 mm)
A07691
Fig. 5 -- Bottom Mounted Filter Inside Furnace
External Filter Rack
A plastic end cap is inserted in the filter rack after the filter is
installed. The end cap keeps air from escaping around the open end
of the filter rack. See Fig. 4 for removal of filter.
Filter racks attached to the furnace are made so the filter simply
slides out one end for removal.
1. Turn OFF electric power to furnace.
2. Remove the end cap from the filter rack.
3. Slide the filter out of the filter rack.
4. Inspect the filter(s) and replace or clean washable types. If
filter is aluminum mesh it should be recoated with filter
coating spray.
5. Reinstall the end cap in the filter rack.
6. Turn furnace on.
Internally Mounted Filter
1. Turn OFF power to furnace.
2. Remove blower door.
3. Slide filter straight out toward you. (See Fig. 5.)
4. Inspect the filter(s) and replace or clean washable types. If
filter is aluminum mesh it should be recoated with filter
coating spray.
5. Replace blower door.
6. Turn on electric power to furnace.
Lubrication
The blower motor and the combustion air blower are
pre--lubricated by the manufacturer and DO NOT require oiling.
Qualified Service Agency Checks
When the furnace is being inspected for condition and operation
have the Qualified Service Agency check the following items.
1. Check all flue gas passages including main and pilot burn-
ers, heat exchanger, and vent.
2. Check electrical wiring and connections.
3. Check supply and return air ducts for leakage, blockage and
connections to furnace.
4. Check circulating air blower wheel and motor. Clean them
if required.
5. Perform an operational checkout on the furnace to be sure
safety controls function and that furnace operates properly.
For additional information, the Qualified Service Agency can
consult the installation instructions for the furnace.
359B
A
V
