Carrier manual Performing Routine Maintenance, For 58MTA and 58MVP, For 58MCA and 58MXA

Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters.

All other operations must be performed by trained and qual- ified service agency personnel. Observe safety precautions in this manual, on tags, and on labels attached to the furnace, and other safety precautions that may apply.

With proper maintenance and care, your furnace will operate economically and dependably. Instructions for basic mainte-

20nance are found on this and the following pages. However, before beginning maintenance, follow these safety precautions:

For 58MTA and 58MVP

21

!WARNING

Turn off electrical power supply to your furnace before removing the access doors to service or perform maintenance. A failure to follow this warning could result in personal injury/death or property damage.

!CAUTION

Although special care has been taken to minimize sharp edges, be extremely careful when handling parts or reaching into the furnace. Failure to follow this caution would result in minor personal injury.

OFF	ON
	or

For 58MCA and 58MXA

22

6.Replace the main furnace door. (See Fig. 16.)

7.If the furnace is being shut down because of a malfunc- tion, call your dealer as soon as possible.

!CAUTION

Furnace is not to be installed, operated, and then turned off and left turned off in an unoccupied structure during winter. (See “Heading South for the Winter” procedures in maintenance section on page 9). Freeze damage to furnace would occur.

PERFORMING ROUTINE

MAINTENANCE

NOTE: The qualified installer or agency must use only factory-authorized replacement parts, kits, and accessories when modifying this product.

Installing and servicing heating equipment can be hazard- ous due to gas and electrical components.

FILTERING OUT TROUBLE

!CAUTION

Never operate your furnace without a filter in place. Doing so may damage the furnace blower motor. An accumulation of dust and lint on internal parts of your furnace can cause a loss of efficiency and would cause minor property or product damage.

A dirty air filter will cause a loss of airflow in your duct system. When excessive loss of airflow occurs, the furnace may cycle on its safety controls. If this condition is left unat- tended, the furnace will eventually lock out. It is recom- mended that the furnace air filter be checked every 3 or 4 weeks and cleaned if necessary.

If installed with factory-specified disposable media filter, check or replace filter before each heating and cooling sea- son. Replace disposable media filter at least once a year.

The air filter is normally located in the blower compartment (See Fig. 3 or 4.) or in the factory-supplied filter cabinet attached to the side or bottom of the furnace casing. If air filter has been installed in another location, contact your deal- er for instructions. To inspect, clean, and/or replace the air filter(s), follow these steps:

1.Turn off electrical supply to furnace. (See Fig. 20.)

2.Remove door/access panel

•AIR FILTERS(S) LOCATED IN BLOWER COMPART- MENT

a.Remove main furnace door. (See Fig. 23.)

b.Remove blower access panel. (See Fig. 24.)

NOTE: It will be necessary to remove 2 screws

• AIR FILTER LOCATED IN FILTER CABINET

7