Owners Manual

7
Specifications subject to change without notice.
440 02 4501 00
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 efficiency.
CAUTION
!
NOTE: The manufacturer has specified filters which will
enable your furnace to provide lasting comfort and efficiency
throughout its life. Contact your dealer to help you choose
filters for your furnace that both collect dirt before it enters
your furnace, as well as provide a low resistance to circulating
air. Avoid filters that report high cleaning efficiencies, but do
not allow air to pass easily through them.
A dirty filter will cause excessive stress on the furnace, heat
exchanger, and blower motor, and can cause the furnace to
overheat and automatically shut down. The furnace filter
should be checked every four weeks and cleaned or replaced
if necessary.
If installed with disposable media filter, check or replace filter
before each heating and cooling season. Replace disposable
media filter at least twice a year.
If your furnace filter needs replacing, be sure to use the same
size and type of filter that was originally specified.
The air filter for the furnace may be located in a filter
cabinet/rack attached to the side or bottom of the furnace. 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 the electrical supply to the furnace (see
Figure 10)
2. Remove filter cabinet door/cover.
3. Slide air filter out of filter cabinet/rack. Keep dirty side up
(if dirty) to avoid spilling dirt.
4. Inspect the filter. If torn, replace it.
NOTE: If the filter is:
a. a 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.
b. an Electronic Air Cleaner (EAC) — Refer to EAC
Owner’s Manual for maintenance information.
c. a washable filter, wash filter (if dirty) in sink, bathtub,
or outside with a garden hose. Always use cold tap
water. A mild liquid detergent may be used if
necessary. Spray water through filter in the opposite
direction of airflow. Allow filter to dry.
5. Reinstall clean air filter.
6. Replace filter cabinet door.
7. Turn on electrical supply to furnace (See Figure 15).
NOTE: If side return ducts are used, two filters may be
required in some models. The procedure listed above may be
used to remove side filters.
Washable filters may be field modified by cutting filter material
and support rods (3) in filters. Alternate sizes and additional
filters may be ordered from your dealer.
Filter Size Information − inch (mm)
FURNACE CASING
WIDTH
FILTER SIZE
FILTER TYPE
SIDE RETURN BOTTOM RETURN
14-3/16 (360) 16 x 25 x 3/4 (406 x 635 x 19) 14 x 25 x 3/4 (356 x 635 x 19) Washable*
17-1/2 (445) 16 x 25 x 3/4 (406 x 635 x 19) 16 x 25 x 3/4 (406 x 635 x 19) Washable*
21 (533) 16 x 25 x 3/4 (406 x 635 x 19) 20 x 25 x 3/4 (508 x 635 x 19) Washable*
24-1/2 (622) 16 x 25 x 3/4 (406 x 635 x 19) 24 x 25 x 3/4 (610 x 635 x 19) Washable*
* Recommended to maintain air filter face velocity. See Specification for part number.
**Some furnaces may have 2 filters
COMBUSTION AREA AND VENT SYSTEM
! WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury
or death.
For proper and safe operation the furnace needs air for
combustion and ventilation. Do not block or obstruct air
openings on the furnace, air opening to the area in which
the furnace is installed, the inlet and vent openings on the
exterior of home, and the space around the furnace.
Inspect the combustion area and vent system before each
heating season. An accumulation of dirt, soot, or rust can
mean a loss of efficiency and improper performance. Buildups
on the main burners can cause faulty firing. This “delayed
ignition” is characterized by an alarmingly loud sound.
NOTE: If your furnace makes a loud noise when the main
burners are ignited, shut down the furnace and call your
servicing dealer.
Use your flashlight and follow these steps for inspecting the
combustion area and vent system of your furnace:
1. Turn off gas and electrical supply to the furnace and
remove the access door. (See Figure 9 and Figure 11)
2. Carefully inspect the gas burner for dirt, rust, or scale.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
If dirt, rust, soot, or scale accumulations are found, call
your dealer. Do not operate your furnace.
!
WARNING
3. Inspect the vent pipe for a sag, holes, or a disconnection.
A horizontal vent pipe must slope upward away from
furnace. If open joints or seams, or signs of water
leakages are found, call your dealer for service.