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7
Installing and servicing of heating
equipment can be hazardous due to
gas and electrical components.
Only trained and qualified personnel
should install, repair, or service heat-
ing equipment. Untrained personnel
can perform basic maintenance func-
tions such as cleaning and replacing air
filters.
All other operations must be performed
by trained and qualified service agency
personnel. Observe safety precautions
in this manual, on tags, and on labels
attached to the furnace and other safety
precautions that may apply.
With proper maintenance and care, your
furnace will operate economically and
dependably. Instructions for basic main-
tenance are found on this and the follow-
ing pages. However, before beginning
maintenance, follow these safety pre-
cautions:
FILTERING OUT TROUBLE
A dirty air filter will cause a loss of airflow
in your duct system. When excessive loss
WARNING
Turn off electrical power sup-
ply to your furnace before re-
moving the main furnace door
to service or perform mainte-
nance. Failure to follow this
warning could result in per-
sonal injury/death or property
damage.
CAUTION
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reach-
ing into the furnace. Failure to
follow this caution woud result
in minor personal injury.
CAUTION
Never operate your furnace
without the air filter in place.
Doing so may damage the fur-
nace blower motor. An accu-
mulation of dust and lint on
internal parts of your furnace
can cause a loss of efficiency
and would cause minor prop-
erty or product damage.
!
!
!
of airflow occurs, the furnace may cycle
on its safety controls. If this condition is
left unattended, the furnace will eventu-
ally lock out. It is recommended that the
furnace air filter be checked every 3 or 4
weeks and cleaned if necessary.
If installed with factory-specified dis-
posable media filter, check or replace fil-
ter before each heating and cooling
season. Replace media filter at least
once a year.
The air filter is normally located in the
blower compartment (See Fig. 3 or 4.)
or in the factory-supplied filter cabinet
attached to the side or bottom of the
furnace casing. If air filter has been
installed in another location, contact
your dealer for instructions. To inspect,
clean, and/or replace the air filter(s),
follow these steps:
1. Turn off electrical supply to fur-
nace. (See Fig. 20.)
2. Remove door/access panel
• AIR FILTER(S) LOCATED IN
BLOWER COMPARTMENT
a. Remove main furnace door.
(See Fig. 23.)
b. Remove blower access panel.
(See Fig. 24.)
NOTE: It will be necessary to
remove 2 screws
• AIR FILTER LOCATED IN FIL-
TER CABINET
a. Remove filter cabinet door (See
Fig. 25 and 26.)
NOTE: It will be necessary to
remove 1 thumbscrew
3. Remove air filter from furnace.
• AIR FILTER LOCATED IN
BLOWER COMPARTMENT
BOTTOM:
a. Slide filter retainer sideways
until it is free of latch. (See
Fig. 27.)
b. Slide air filter out of furnace.
(See Fig. 28.)
• AIR FILTER(S) LOCATED IN
BLOWER COMPARTMENT
SIDE:
a. Remove filter retainer from
latch. (See Fig. 29.)
b. Gently remove air filter and
carefully turn the dirty side up
(if dirty) to avoid spilling dirt
from the filter. (See Fig. 30.)
• AIR FILTER LOCATED IN FIL-
TER CABINET:
a. Slide air filter out of furnace. Keep
dirty side up (if dirty) to avoid
spilling dirt. (See Fig. 31 and 32.)
23
24
25
26
4. Inspect the filter. If torn, replace it.
NOTE: If washable filter that was
shipped with the furnace has been
replaced by:
a. Factory specified disposable
media filter – Do not clean. If
dirty, replace only with media fil-
ter having the same part number
and size. Install with airflow