Carrier 48SX specifications Routine Maintenance, Maintenance and Care for Equipment Owner

ROUTINE MAINTENANCE

All routine maintenance should be handled by skilled, ex- perienced personnel. Your dealer can help you establish a standard procedure.

For your safety, keep the unit area clear and free of com- bustible materials, gasoline, and other ¯ammable liquids and vapors.

To assure proper functioning of the unit, ¯ow of combus- tion and ventilating air must not be obstructed from reaching the unit. Clearance of at least 30 in. is required on all sides except the duct side.

MAINTENANCE AND CARE FOR THE

EQUIPMENT OWNER

Before proceeding with those things you might want to maintain yourself, please carefully consider the following:

1.TURN OFF GAS SUPPLY AND ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORMING MAINTENANCE.

2.Do not turn off electrical power to this unit without ®rst turning off the gas supply.

3.When removing access panels or performing main- tenance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care is taken to reduce sharp edges to a minimum, be ex- tremely careful when handling parts or reaching into the unit.

Air Filters Ð Air ®lter(s) should be checked at least ev- ery 3 or 4 weeks and changed or cleaned whenever it be- comes dirty. Dirty ®lters produce excessive stress on the blower motor and can cause the motor to overheat and shut down. Table 1 indicates the correct ®lter size for your unit. Refer to Fig. 5 to access the ®lter(s).

To replace or inspect ®lter(s) (or accessory ®lter rack when supplied):

1.Remove the ®lter access panel using a 5¤16-in. nut driver.

2.Remove the ®lter(s) by pulling the ®lter(s) out of the unit. If the ®lter(s) is dirty, clean or replace with new one.

When installing the new ®lter(s), note the direction of the air¯ow arrows on the ®lter frame.

If you have difficulty in locating your air ®lter(s), or if you have questions concerning proper ®lter maintenance, con- tact your dealer for instructions. When replacing ®lters, al- ways use the same size and type of ®lter that was supplied originally by the installer.

Table 1 Ð Indoor-Air Filter Data

UNIT SIZE			018-024	030-036	042		048-060
48SS
Filter Size			20 x 20	20 x 24		24 x 24	24 x 30
	UNIT SIZE			024-036		042-060
		48SX
	Filter Size			24 x 24		24 x 30

Never operate your unit without ®lters in place. Failure to heed this warning may result in damage to the blower motor and/or compressor. An accumulation of dust and lint on internal parts of your unit can cause loss of ef- ®ciency and, in some cases, ®re.

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