Carrier 58RAP - Manual (Page 8)

When the room temperature drops below the temperature se­
lected on the thermostat, the himace 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 fur­
nace 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
procedures and the procedures on the lighting/operating in­
structions label on your furnace must be followed:
1. Set your room thermostat to the lowest temperature set­
ting. (See Fig. 17.)
2. TUm OFF the electrical supply to your furnace. (See
Fig. 18.)
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17
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3. Remove the access door(s) from your furnace. Lift up and
out at the bottom. (See Fig. 9 for upflow and Fig. 10 for
downflow furnaces.)
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 PI­
LOT position.
5. To shut off the complete gas control system (pilot and
burners), 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. 7.)
7. Replace the access door. (See Fig. 15 or 16.) On downflow
furnaces, remove the blower access door, install the con­
trol access door, then reinstall the blower access door and
secure with 2 screws.
8. If the furnace is being shut down because a malfunction is
suspected, call your service dealer as soon as possible.
NOTE: Tb 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 oper­
ate 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
maintenance, follow these safety precautions:
A WARNING
TURN OFF ELECTRICAL POWER SUPPLY TO YOUR
FURNACE BEFORE REMOVING THE ACCESS
DOORS TO SERVICE OR PERFORM MAINTE­
NANCE. A FAILURE TO FOLLOW THIS WARNING
COULD RESULT IN PERSONAL INJURY OR DEATH.
A CAUTION
ALTHOUGH SPECIAL CARE HAS BEEN TAKEN TO
MINIMIZE SHARP EDGES, BE EXTREMELY CARE­
FUL WHEN HANDLING PARTS OR REACHING
INTO THE FURNACE.
FILTERING OUT TROUBLE
A dirty filter will cause excessive stress on the fiimace 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 (seepage?) and compare your furnace size with
the proper filter size.
A CAUTION
NEVER OPERATE YOUR FURNACE WITHOUT A
FILTER IN PLACE.
Doing so may damage the furnace blower motor. An accu­
mulation of dust and lint on internal parts of your furnace
can cause a loss of efficiency.
The air filter for upflow furnaces is normally located in the
blower compartment. Filters for the downflow furnaces are nor­
mally located in the return-air plenum above the blower. If the
filters have been installed in another location, contact your
dealer for instructions. Tb inspect, clean and/or replace the air
filter(s), follow these steps:
• UPFLOW FURNACES ONLY:
1. Thrn OFF the electrical supply to the furnace. (See
Fig. 18.)
2. Remove control and blower access doors.
3. Push filter retainer toward the bracket opening to release
the filter. (See Fig. 19.)
4. Gently remove the filter and carefully turn the dirty side
up (if dirty) to avoid “spilling” dirt from the filter. (See
Fig. 20.)