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8
Only trained and qualified personnel should install, repair, or
service heating equipment. Untrained personnel can perform
basic maintenance functions 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, a nd 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 maintenance
are found on this and the following pages. However, before
beginning maintenance, follow these safety precautions:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury/death.
Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.
!
WARNING
CUT HAZARD
Failure to follow this caution may result in minor personal
injury .
Although special care has been taken to minimize sharp
edges, be extremely careful when handling parts or reaching
into the furnace.
CAUTION
!
Filtering Out Trouble
UNIT PERFORMANCE HAZARD
Failure to follow this caution may result in product damage.
Never operate your furnace without a filter in place. Doing
so may damage the furnace blower motor. An
accumulation of dust and lint on internal parts of your
furnace can cause a loss of ef ficiency .
CAUTION
!
A dirty air filter will cause a loss of airflow in your duct system.
When excessive loss of airflow occurs, the furnace m ay c ycle on
its safety controls. If this c ondition is left unattended, the furnace
will eventually 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 disposable media filter, check
or replace filter before each heating and cooling season. Replace
disposable media filter at least once a year.
The air filter is normally located in the blower c ompartment 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 furnace. (See Fig. 19.)
2. Remove door/access panel.
a. Air Filters Located in Blower Compartment
(1.) Remove main furnace door. (See Fig. 22.)
(2.) Remove blower access panel. (See Fig. 23.)
NOTE: It will be necessary to remove 2 screws
b. Air Filters Located in Filter Cabinet
Remove filter cabinet door. (See Fig. 24 and 25.)
NOTE: It will be necessary to remove 1 thumbscrew
3. Remove air filter from furnace.
a. Air Filters Located in Blower Compartment Bottom:
(1.) Slide filter retainer sideways until it is free of
latch. (See Fig. 26.)
(2.) Slide air filter out of furnace. (See Fig. 27.)
b. Air Filters Located in Blower Compartment Side:
(1.) Remove filter retainer from latch. (See Fig. 28.)
(2.) Gently remove air filter and carefully turn the
dirty side up (if dirty) to avoid spilling dirt from
the filter . (See Fig. 29.)
c. Air Filter Located in Filter Cabinet:
Slide air filter out of furnace. Keep dirty side up (if
dirty) to av oid spilling dirt. (See Fig. 30 and 3 1.)
4. Inspect the filter. If torn, replace it.
NOTE: If washable filter that was shipped with the furnace has
been replaced by:
--Factory specified disposable media filter: Do not clean. If dirty,
replace only with media filter having the same part number and
size. Install with airflow direction arrow pointing towards blower.
--Electronic air cleaner (EAC): Refer to EAC Owner’s Manual
for maintenance information.
A05099
Fig. 22 -- Removing Furnace Door
A93204
Fig. 23 -- R emoving Blower Access Panel