The ability to properly perform maintenance on this equip- ment requires certain expertise, mechanical skills, tools, and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment other than those procedures recommended in the User's Manual. FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THIS EQUIPMENT, SERIOUS PERSONAL INJURY, OR DEATH.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equip- ment failure, it is essential that periodic maintenance be performed on this equipment. Consult your local dealer as to the proper frequency of maintenance and the availability of a maintenance contract.
Turn off the gas and electrical supplies to the unit before performing any maintenance or service. Follow the operating instructions on the label attached to the furnace. A failure to follow this warning could result in personal injury.
Never store anything on, near, or in contact with the furnace, such as:
1.Spray or aerosol cans, rags, brooms, dust mops, vacuum cleaners, or other cleaning tools.
2.Soap powders, bleaches, waxes or other cleaning com- pounds, plastic or plastic containers, gasoline, kerosene, cigarette lighter fluid, dry cleaning fluids, or other volatile fluids.
3.Paint thinners and other painting compounds, paper bags or other paper products.
A failure to follow this warning could result in corrosion of the heat exchanger, fire, personal injury, or death.
The minimum maintenance that should be performed on this equipment is as follows:
1.Check and clean air filter each month or more frequently if required. Replace if torn.
2.Check blower motor and wheel for cleanliness and lubrication each heating and cooling season. Clean and lubricate as necessary.
3.Check electrical connections for tightness and controls for proper operation each heating season. Service as necessary.
As with any mechanical equipment, personal injury can result from sharp metal edges, etc., therefore, be careful when removing parts.
AIR FILTER ARRANGEMENT Ð The air filter arrangement may vary depending on the application. Refer to Table 1 or 2 for filter size information.
Table 1ÐFilter Size Information for Downflow
Furnace (In.)
FURNACE | FILTER QUANTITY | FILTER |
CASING WIDTH | AND SIZE | TYPE |
(2) 16 X 20 X 1 | Cleanable | |
(2) 16 X 20 X 1 | Cleanable | |
21 | (2) 16 X 20 X 1 | Cleanable |
(2) 16 X 20 X 1 | Cleanable | |
|
|
|
Table 2ÐFilter Size Information for Upflow
Furnace (In.)
FURNACE | FILTER QUANTITY AND SIZE | FILTER | |
CASING WIDTH | Side Return | Bottom Return | TYPE |
(1) 16 X 25 X 1* | (1) 14 X 25 X 1 | Cleanable | |
(1) 16 X 25 X 1* | (1) 16 X 25 X 1 | Cleanable | |
21 | (1) 16 X 25 X 1 | (1) 20 X 25 X 1* | Cleanable |
(2) 16 X 25 X 1* | (1) 24 X 25 X 1 | Cleanable | |
|
|
|
|
*Factory provided with the furnace. Filters may be field modified by cutting as required.
AIRFLOW 
INSTALLATION
POSITION
OF FILTERS
PLENUM
ACCESS DOOR
A88486
Fig. 3ÐFilter Positions
Never operate unit without a filter or with filter access door removed. A failure to follow this warning could result in fire, personal injury, or death.
1.Downflow
Each furnace requires 2 filters which are installed in the
To remove filters for cleaning or replacement, proceed as follows:
a.Disconnect electrical power before removing blower access door.
2