Filter
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Page 5
Figure 4
BOTTOM RETURN FILTER INSTALLATION
FURNACE
BASE BOTTOM
REAR FILTER CLIP
RETURN AIR OPENING
SIDE FILTER CLIPS (2)
FURNACE
FRONT
FURNACE
BACK
4 - Clean filter with cold water and a mild soap. Direct
water through filter in the opposite direction of air
flow. Remove all soap residue.
5 - Allow filter to dry then spray with filter handicoater
prior to reinstallation. Filter handicoater is available
from your Lennox dealer as P-8-5069.
6 - Place filter in bottom of blower compartment beneath
rear filter clip. Press down on filter sides. Filter clips
flex, allowing filter to snap into place.
7 - Replace blower access panel.
WARNING
Blower door must be securely in place when blower
and burners are operating. Gas fumes, which could
contain carbon monoxide, can be drawn into living
space resulting in personal injury or death.
Side Return Air Filter Installation (Figure 5)
1 - Turn off electric power to furnace.
2 - Locate the filter door of the filter rack assembly.
3 - Using the filter door pins, pull filter door, with filter atĆ
tached, out of filter rack assembly. Remove filter door
from filter by pulling up on securing tabs.
4 - Clean filter with cold water and a mild soap. Direct
water through filter in the opposite direction of air
flow. Allow filter to dry, then spray with filter handiĆ
coater prior to reinstallation. Filter handicoater is
available from your Lennox dealer as P-8-5069.
5 - Position filter door on end of filter so that the thumb
tab side of the filter door is away from the furnace.
Check for correct air flow position. Squeeze thumb
tabs to secure filter to door.
6 - Guide filter and filter door into the filter rack
installed on side of furnace. Push door into filter
rack until secure.
Figure 5
REMOVING / REPLACING FILTER DOOR
FILTER DOOR
FILTER
FILTER DOOR
PIN
TAB
TAB
FILTER DOOR
PIN
Seasonal Inspections
A qualified service technician should inspect the comĆ
plete system each season (heating and cooling). The folĆ
lowing maintenance procedures should be conducted by
a qualified service technician. Do not attempt to service
the unit in any way.
During a seasonal check the service technician will inĆ
spect the indoor blower, the burner flame and the venting
system.
Venting System
Annually (before heating season) inspect furnace ventĆ
ing system, heat exchanger and burners for corrosion,
deterioration, or deposits of debris. Remove any obĆ
structions.
Inspect furnace venting system to make sure it is in place,
physically sound, and without holes, corrosion, or blockĆ
age. Vent connector must be in correct position, sloped
upward and be physically sound without holes or excesĆ
sive corrosion.
Inspect furnace return air duct connection to ensure duct
is sealed to the furnace and terminates outside the space
containing the furnace.
Inspect the physical support of the furnace to guarantee
that it is sound without sagging, cracks or gaps around
base and it maintains seal between base and support.
Inspect and clean the condensate traps and drain.
Blower
Check and clean blower wheel for any debris. Blower moĆ
tor is preĆlubricated for extended bearing life. No further
lubrication is needed.