Performing Routine Maintenance; Filtering Out Trouble - Bryant 373LAV User's Information Manual

5. Turn the control knob or switch on
the gas valve to the OFF position.
(See Fig. 22 or 23.)
6. Replace the control access door.
(See Fig. 16 or 17.)
7. If the furnace is being shut down
because of a malfunction, call your
dealer as soon as possible.
PERFORMING ROUTINE
MAINTENANCE
With the proper maintenance and care,
your furnace will operate economically
and dependably. Basic maintenance,
which can easily be accomplished by
®
someone who follows the directions, is
found on this and the following pages.
However, before beginning mainte-
nance, follow these safety precautions:
WARNING
!
Turn off electrical power sup-
ply to your furnace before re-
20
moving the access doors to
service or perform mainte-
nance. A failure to follow this
warning could result in per-
sonal injury or death.
CAUTION
!
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reach-
ing into the furnace.
21
FILTERING OUT
TROUBLE
A dirty filter will cause excessive stress
on the furnace blower motor and can
cause it to overheat and automatically
shut down. The furnace filter should 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 season. Replace disposable
media filter at least once a year.
If installed with factory specified dis-
posable media filter, check or replace
filter before each heating and cooling
22
OR
23
season. Replace disposable media filter
at least once a year.
If your furnace filter needs replacing, be
sure to use the same size and type of fil-
ter that was originally supplied. Use the
Furnace Filter Table and compare your
furnace size with the proper filter size.
Never operate your furnace
without a filter in place. Doing
so may damage the furnace
blower motor. An accumula-
tion of dust and lint on internal
parts of your furnace can
cause a loss of efficiency.
The air filter for upflow furnaces is nor-
mally located in the blower compart-
ment (See Fig. 03.) or in the factory-
supplier filter cabinet attached to the
side or bottom of the blower cabinet.
Filters for the downflow furnaces are
normally located in the return-air ple-
num above the blower. If air filter has
been installed in another location, con-
tact your dealer for instructions. To in-
spect, clean, and/or replace the air
filter(s). follow these steps:
UPFLOW FURNACES ONLY:
1. Turn off electrical supply to fur-
2. Remove door/access panel.
• AIR FILTER(S) LOCATED IN
• AIR FILTER LOCATED IN FIL-
NOTE: It will be necessary to remove 1
thumbscrew
6
CAUTION
!
nace. (See Fig. 9)
BLOWER COMPARTMENT
Remove control and blower access
doors. (See Fig. 10 and 11)
TER CABINET
Remove filter cabinet door (See
Fig. 30 and 31)
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