Carrier Gas 58MSA - Manual (Page 7)

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operations must be performed by trained service person-
nel. 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. Installations 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
The air filter is normally located in the blower compartment.
(See Fig. 2) If air filter has been installed in another location,
contact your dealer for instructions. To inspect, clean and/or
replace the air filter(s), follow these steps:
1. Turn off the electrical supply to the furnace. (See Fig. 16.)
2. Remove main furnace door. (See Fig. 18.)
3. Remove blower access panel. (See Fig. 19.)
NOTE: It will be necessary to remove 2 screws.
4. Remove air filter from furnace.
•AIR FILTER(S) LOCATED IN END OF FURNACE:
a. Slide filter retainer sideways until it is free of latch. (See
Fig. 20.)
b. Slide air filter out of furnace. (See Fig. 21.)
18 19
20 21
• AIR FILTER LOCATED IN SIDE:
a. Remove filter retainer from latch. (See Fig. 25.)
b. Gently remove air filter and carefully turn the dirty side up (if
dirty) to avoid spilling dirt from the filter. (See Fig. 26.)
5. Inspect the filter. If torn, replace it.
22 23
WARNING
Turn off electrical power supply to your furnace
before removing the main furnace door to service
or perform maintenance. Failure to follow this
warning could result in personal injury or death.
CAUTION
Although special care has been taken to minimize
sharp edges, be extremely careful when handling
parts or reaching into the furnace.
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.
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