—6—
SUGGESTION: Setting the thermostat back a few degrees—
and compensating for the difference with warmer clothing—can
make a big difference in your fuel consumption on extremely
cold days. The few degrees at the top of your thermostat “com-
fort level” are the most costly degrees to obtain.
When the room temperature drops below the temperature se-
lected on the thermostat, the furnace will be switched on auto-
matically. When the room temperature reaches the degree
selected on the thermostat, the furnace will be automatically
switched off.
Some thermostats have a “fan” switch with 2 selections: AUTO
or ON. When set on AUTO, the furnace blower cycles on and
off, controlled by the thermostat. In the ON position, the furnace
blower runs continuously except for a 45-sec delay at the “call
for heat.’’ This keeps the temperature level in your home more
evenly balanced. It also continuously filters the indoor air.
SHUTTING DOWN YOUR FURNACE
Once the heating season has ended, or if you ever suspect a mal-
function, you’ll want to turn your furnace off. The following pro-
cedures and the procedures on the lighting/operating
instructions label on your furnace must be followed:
1. Set your room thermostat to the lowest temperature setting.
(See Fig. 13.)
2. Turn OFF the electrical supply to your furnace.
(See Fig. 14.)
13
14
3. Remove the access door(s) from your furnace. Lift up and
out at the bottom. (See Fig. 7.)
NOTE:
The blower access door must be installed to permit fur-
nace operation.
4. To shut off the burners but keep the pilot light burning, turn
the control knob of the internal gas valve to the PILOT po-
sition.
5. To shut off the complete gas control system (pilot and burn-
ers), turn (and depress if required) the control knob on the
internal gas valve clockwise to the indicated OFF position.
6. Close the external manual gas valve. (See Fig. 5.)
7. Replace the access doors. (See Fig. 12.)
8. If the furnace is being shut down because a malfunction is
suspected, call your service dealer as soon as possible.
NOTE:
To conserve energy when the heating season has ended,
you should shut down your manually ignited pilot.
If the furnace blower is to be used during the cooling season,
turn the control knob on the internal gas valve to OFF. Leave the
electrical supply to the furnace turned ON.
PERFORMING ROUTINE MAINTENANCE
With the proper maintenance and care, your furnace will operate
economically and dependably. Basic maintenance, which can
easily be accomplished by following the directions, is found on
this and the following pages. However, before beginning main-
tenance, follow these safety precautions:
FILTERING OUT TROUBLE
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.
If your furnace filter needs replacing, be sure to use the same
size and type of filter that was originally supplied. Use the fur-
nace filter table (see page 7) and compare your furnace size with
the proper filter size.
The air filter for upflow furnaces is normally located in the
blower compartment. If the filters have been installed in another
location, contact your dealer for instructions. To inspect, clean
and/or replace the air filter(s), follow these steps:
c
UPFLOW FURNACES ONLY:
1. Turn OFF the electrical supply to the furnace. (See Fig. 14.)
2. Remove control and blower access doors.
3. Push filter retainer toward the bracket opening to release
the filter. (See Fig. 15.)
4. Gently remove the filter and carefully turn the dirty side up
(if dirty) to avoid “spilling’’ dirt from the filter.
(See Fig. 16.)
15
16
SYSTEM
COOL OFF HEAT
FAN
AUTO ON
50
70
90
50
70
90
WARNING
TURN OFF ELECTRICAL POWER SUPPLY TO
YOUR FURNACE BEFORE REMOVING THE AC-
CESS DOORS TO SERVICE OR PERFORM MAINTE-
NANCE. A 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 REACH-
ING 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.
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