Carrier 58ZAV - Manual (Page 6)

SHUTTING DOWN YOUR FURNACE
Should you ever suspect a malfunction in your furnace, you will
need to turn the furnace off. The following procedures must be
followed:
1. Set your room thermostat to the lowest temperature set­
ting. (See Fig. 18.)
2. Close the external manual gas valve. (See Fig. 8 on page 5.)
3. Tbrn OFF the electrical power to your furnace. (See Fig.
19.)
A86026 A86027
4. Remove the control access door on your furnace. (See Fig.
10 or 11.) On upflow furnaces, removing the blower access
door is not required.
5. Tlirn the control knob on the gas valve to the OFF position.
(See Fig. 20.)
6. Replace the control access door. (See Fig. 14 or 15.)
20
7. If the furnace is being shut down because of a malfunction,
call your dealer as soon as possible.
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 someone who follows the direc­
tions, 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 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 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. To inspect, clean and/or replace the air
filter(s), follow these steps:
UPFLOW FURNACES ONLY:
1. Tirn OFF the electrical supply to the furnace. (See Fig.
19.)
2. Remove control and blower access doors.
3. Push filter retainer toward the bracket opening to release
the filter. (See Fig. 21.)
4. Gently remove the filter and carefully turn the dirty side
up (if dirty) to avoid “spilling” dirt from the filter. (See
Fig. 22.)
5. Inspect the filter. If torn, replace the filter.
6. Wash the filter (if dirty) in a sink, bathtub, or outside with
a garden hose. Always use cold tap water. A mild liquid de­
tergent may be used if necessary. Spray water through the
filter in the opposite direction of airflow (through the
cross-mesh binding side). Allow filter to dry.