Carrier 48PG03---16 Maintaining Your Unit, Routine Maintenance and Care For the Equipment Owner

CONTROL BOX	INDOOR MOTOR
AND COMPRESSOR	ACCESS DOOR
ACCESS DOOR

OUTDOOR AIR

SCREEN

CONDENSER COIL

ACCESS DOOR

GAS SECTION

ACCESS DOOR

FILTER ACCESS

DOOR

Fig. 6 — Panel and Filter Locations (48PG03-07 Shown)

MAINTAINING YOUR UNIT

All maintenance should be handled by skilled, experienced personnel. Your dealer can help you establish a standard procedure.

For your safety, keep the area around the unit clear and free of combustible materials, gasoline and other flammable liquids and vapors.

To assure proper functioning of the unit, flow of combustion and ventilating air must not be obstructed from reaching the unit. Clearance of at least 6 ft on all sides is required.

ROUTINE 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 first turning off the gas supply.

3.When opening access doors or performing mainte- nance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care has been taken to reduce sharp edges to a minimum, be extremely careful when handling parts or reaching into the unit.

Air Filter(s) — Air filters should be checked at least every 3 or 4 weeks and changed or cleaned whenever they become dirty. Table 1 indicates the correct filter size for your unit. Open the filter access panel to replace or inspect the filters. All units have filter tracks into which the filters slide. Remove the filters by pulling the filter slide outward from the

track. See Fig. 6 for filter access panel location. Note the direc- tion of flow arrows on the filter frame.

If you have difficulty in locating your air filter in the return- air duct system, or if you have questions concerning proper filter maintenance, contact your dealer for instructions. When replacing your unit filters, always use the correct size and quantity as shown in Table 1. Filter tracks are field convertible for 2 or 4-in. thick filters. Verify airflow and duct static values, and related motor sizing and belt drive adjustment, if filter type or efficiency rating is changed from the original installation.

Units with outdoor air capability have cleanable screens for the outdoor air. These screens should be checked annually and cleaned as necessary.

Never operate your unit without filters 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 efficiency and in some cases, fire.

Table 1 — Indoor Air Filter Data

UNIT 48PG	FILTER QUANTITY	FILTER SIZE (in.)
03-07	4	16 x 25 x 2 or 16 x 25 x 4
08-14	6	20 x 25 x 2 or 20 x 25 x 4
16	8	20 x 20 x 2 or 20 x 20 x 4

Alarm Status (Units with ComfortLink™ Con- trol) — The Scrolling Marquee display incorporates an Alarm Status LED that turns on to indicate an active alarm or alert. These alarms and alerts are in addition to those that are indicated by the Integrated Gas Control (IGC). The ComfortLink control active alarm codes and alarm history can be viewed with the Scrolling Marquee or other Carrier Comfort Network® (CCN) devices. Alarms may also be configured to broadcast automatically on CCN. If the unit will not operate

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