—6—
4. Turn the switch on the gas valve to the OFF position. (See Fig. 15.)
5. If the furnace is being shut down because of a malfunction, call your dealer as soon as possible.
13
14
15
PERFORMING ROUTINE MAINTENANCE
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:
FILTERING OUT TROUBLE (Optional Accessory)
A dirty filter will cause excessive stress on the furnace blower motor and can cause it to overheat and automatically shut down. The furnace
filter should be checked every 3 or 4 weeks and cleaned if necessary.
The air filter is normally located in the blower compartment before the blower. (See Fig. 17.) If the filter(s) has been installed in another location,
contact your dealer for instructions. To inspect, clean, and/or replace the air filter(s), follow these steps:
If your furnace filter needs to be replaced, be sure to use the same size and type of filter that was originally supplied. Use the furnace filter table
and compare your furnace size with the proper filter size.
HORIZONTAL FURNACE FILTER TABLE
•
REMOVE THE FILTER FOR CLEANING AS FOLLOWS:
1. Turn off electrical supply to the furnace. (See Fig. 14.)
2. Remove blower access door located at the inlet (return-air) end of the furnace (4 screws must be removed). (See Fig. 16.)
3. Bend the formed wire filter retainer to clear the furnace flange at 1 side.
4. Pivot the filter retainer toward the blower. (See Fig. 17.)
5. Remove the filter from the furnace.
6. Inspect the filter. If torn, replace it.
WARNING: TURN off electrical power supply to your furnace before removing the access doors to service or per-
form maintenance. Failure to follow this warning could result in personal injury or death.
CAUTION: Although special care has been taken to minimize sharp edges, be extremely careful when handling
parts or reaching into the furnace.
CAUTION: 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.
HORIZONTAL FURNACE INPUT (BTUH)
FILTER SIZE (IN.)
FILTER TYPE
50,000
(1) 13 x 23 x 1/2
Cleanable
75,000
(1) 13 x 23 x 1/2
Cleanable
100,000
(1) 16-1/2 x 23 x 1/2
Cleanable
125,000
(1) 20 x 23 x 1/2
Cleanable
®
ON
OFF
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