Carrier 58MCB User's Manual | Page 8
8
Only trained and qualified personnel should install, repair, or ser-
vice 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-
nance are found on this and the following pages. However,
before beginning maintenance, follow these safety precautions:
FILTERING OUT TROUBLE
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. 22.)
2. Remove door/access panel
• AIR FILTERS(S) LOCATED IN BLOWER COMPART-
MENT
a. Remove main furnace door. (See Fig. 25.)
b. Remove blower access panel. (See Fig. 26.)
NOTE:
It will be necessary to remove 2 screws
• AIR FILTER LOCATED IN FILTER CABINET
a. Remove filter cabinet door. (See Fig. 27 and 28.)
NOTE:
It will be necessary to remove 1 thumbscrew
3. Remove air filter from furnace.
• AIR FILTER LOCATED IN BLOWER COMPARTMENT
BOTTOM:
a. Slide filter retainer sideways until it is free of latch. (See
Fig. 29.)
b. Slide air filter out of furnace. (See Fig. 30.)
• AIR FILTER(S) LOACTED IN BLOWER COMPART-
MENT SIDE:
a. Remove filter retainer from latch. (See Fig. 31.)
b. Gently remove air filter and carefully turn the dirty side up
(if dirty) to avoid spilling dirt from the filter. (See Fig. 32.)
• AIR FILTER LOCATED IN FILTER CABINET:
a. Slide air filter out of furnace. Keep dirty side up (if dirty)
to avoid spilling dirt. (See Fig. 33 and 34.)
4. Inspect the filter. If torn, replace it.
NOTE: If washable filter that was shipped with the furnace has
been replaced by:
a) Factory specified disposable media filter–Do not clean. If
dirty, replace only with media filter having the same part
number and size. Install with airflow direction arrow point-
ing towards blower.
25
26
27
29 30
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in per-
sonal injury/death.
Turn off electrical power supply to your furnace
before removing the access doors to service or
perform maintenance.
CAUTION
CUT HAZARD
Failure to follow this caution may result in minor
personal injury.
Although special care has been taken to minimize
sharp edges, be extremely careful when handling
parts or reaching into the furnace.
CAUTION
UNIT PERFORMANCE HAZARD
Failure to follow this caution may result in product
damage.
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.
!
!
!
A05099
28
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