Carrier 58CLA User Manual

Page 6

ture level in your home more evenly balanced. It
also continuously filters the indoor air.

NOTE:

Constant low-speed blower operation can also

be achieved by turning on the constant blower rocker
switch located on top of unit. Regardless of room ther-
mostat setting, blower will run continuously in low
speed to provide constant air circulation. If constant
blower rocker switch is turned off, room thermostat
will control blower operation.

SHUTTING DOWN YOUR FURNACE

Should you need to shut down your furnace for service
or maintenance, you will need to turn the furnace off.
The following procedures must be followed:

1. Set the thermostat to the lowest setting.

(See Fig. 8.)

2. Turn off all electrical power to the appliance.

(See Fig. 9.)

3. Close the oil supply valve. (See Fig. 10.)

4. If applicable, turn off water supply to humidifier.

5. If furnace blower will be necessary for cooling sys-

tem, remember to turn electric power back on when
needed for air conditioning.

6. If the furnace is being shut down because of a mal-

function, call your dealer as soon as possible.

ALWAYS KEEP MAIN OIL VALVE TURNED OFF
IF BURNER IS SHUT DOWN FOR AN EXTENDED
PERIOD OF TIME.

11 12

PERFORMING ROUTINE
MAINTENANCE

With proper maintenance and care, your furnace will
operate economically and dependably. Instructions for
basic maintenance follow. However, before beginning
maintenance, follow these safety precautions:

FILTERING OUT TROUBLE

Dirty air filters will cause a loss of airflow in your duct
system. When excessive loss of airflow occurs, the fur-
nace may cycle on its safety controls. If this condition
is left unattended, the furnace will eventually lock out.
It is recommended that the furnace air filters be checked
every 3 or 4 weeks and cleaned or replaced as necessary.

The air filters are located in the blower compartment
installed in an internal filter rack which is provided as
standard equipment with furnace. (See Fig. 2.) To

WARNING

ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in
personal injury due to electrical shock.
Turn off all electrical power to furnace before
performing any maintenance or service on
unit.

CAUTION

CUTS AND ABRASION HAZARD
Failure to follow this caution may result in mi-
nor personal injury.
Although special care has been taken to mini-
mize sharp edges, be extremely careful when
handling parts or reaching into the furnace.

CAUTION

UNIT OVERHEAT HAZARD
Failure to follow this caution may result in
damage to the furnace blower motor, over
heat the heat exchanger and reduce the effi-
ciency.
Never operate your furnace without the air fil-
ters in place.