Carrier 58HDX instruction manual Procedure 1 Cleaning and/or Replacing Air Filter, CUT Hazard

7.An ESD service kit (available from commercial sources) may also be used to prevent ESD damage.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible equipment failure, it is essential that maintenance be performed annually on this equipment. Consult your local dealer about proper maintenance and maintenance contract availability.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Turn off the gas and electrical supplies to the unit before performing any maintenance or service. Lockout and tag with appropriate label. Follow the operating instructions on the label attached to the furnace.

The minimum maintenance that should be performed on this equipment is as follows:

1.Check and clean or replace air filter each month as needed.

2.Check blower motor and wheel for cleanliness annually.

3.Check electrical connections for tightness and controls for proper operation each heating season. Service as necessary.

4.Check for proper condensate drainage. Clean as necessary.

5.Check for blockages in combustion-air and vent pipes annually.

6.Check burners for cleanliness annually.

!CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Be careful of sharp metal edges, etc. Use care and wear protective clothing, safety glasses, and gloves when removing parts.

Procedure 1 — Cleaning and/or Replacing Air Filter

The air filter arrangement may vary depending on the application or orientation.

!WARNING

FIRE, CARBON MONOXIDE AND POISONING HAZARD

Failure to follow this warning could result in property damage, personal injury, or death.

Never operate unit without a filter or with the blower access panel removed. Operating a unit without a filter or with the blower access door removed could cause damage to the furnace blower motor. Dust and lint on internal parts of furnace can cause a loss of efficiency.

NOTE: If filter has cross-mesh binding, binding must face blower. If filter has an air direction arrow, arrow must point toward blower. To clean or replace the filters, proceed as follows:

1. Turn off electrical supply to furnace.

2.Remove blower door.

3.Slide filter out of furnace (See Fig. 2 and 3).

4.Furnaces are equipped with permanent, washable filter(s). Clean filter by spraying cold tap water through filter in opposite direction of airflow.

5.Rinse filter and let dry. Oiling or coating of filter is not recommended.

6.Slide filter into furnace.

7.Replace blower door.

8.Turn on electrical supply to furnace.

Procedure 2 — Blower Motor and Wheel Maintenance

To ensure long life, economy, and high efficiency, clean accumulated dirt and grease from blower wheel and motor annually.

The inducer and blower motors are pre-lubricated and require no additional lubrication. These motors can be identified by the absence of oil ports on each end of the motor.

The following items should be performed by a qualified service technician.

Clean blower motor and wheel as follows:

1.Turn off electrical supply to furnace.

2.Remove blower door.

3.Disconnect blower motor wires from furnace control board. Field thermostat connections may need to be disconnected depending on their length and routing.

4.Remove control box mounting screws, and position control box, transformer, and door switch assembly to right side of furnace casing.

5.If condensate trap is located in left-or right-hand side of furnace casing, proceed to item 6, otherwise remove trap and tubing as described below. (See top Fig. 6, 7, or 8.)

a.Disconnect field drain connection from condensate trap.

b.Disconnect drain and relief port tubes from condensate trap.

c.Remove condensate trap from blower shelf.

6.Remove screws securing blower assembly to blower shelf and slide blower assembly out of furnace.

7.Clean blower wheel and motor by using a vacuum with soft brush attachment. Be careful not to disturb balance weights (clips) on blower wheel vanes. Do not bend wheel or blades as balance will be affected.

8.If greasy residue is present on blower wheel, remove wheel from the blower housing and wash it with an appropriate degreaser. To remove wheel:

a.Mark blower wheel location on shaft before disassembly to ensure proper reassembly.

b.Loosen setscrew holding blower wheel on motor shaft.

NOTE: Mark blower mounting arms and blower housing so each arm is positioned at the same hole location during reassembly.

c.Mark blower wheel orientation and cutoff plate location to ensure proper reassembly.

d.Remove screws securing cutoff plate and remove cutoff plate from housing.

e.Remove bolts holding motor mounts to blower housing and slide motor and mounts out of housing. Disconnect capacitor and ground wire attached to blower housing before removing motor. Motor mounts need not be removed from motor.

58HDX

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