Shutting Down Your Furnace; Performing Routine Maintenance - Bryant 345MAV User's Information Manual

SHUTTING DOWN
YOUR FURNACE
Should you need to shut down your
furnace for service or maintenance,
you will need to turn the furnace off.
The following procedures must be
followed:
1. Set your room thermostat to the
lowest temperature setting.
(See Fig. 15.)
2. Close the external manual gas
valve. (See Fig. 7.)
3. Turn off electrical supply to the
furnace. (See Fig. 16.)
4. Remove main furnace door.
(See Fig. 9.)
5. Turn control switch on the gas
valve to OFF position.
(See Fig. 17.)
R
6. Replace main furnace door.
(See Fig. 12.)
7. If the furnace is being shut down
because of a malfunction, 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 unoc-
cupied structure during winter.
(See Heading South for the
Winter procedures in mainte-
nance section.) Freeze damage
to furnace could occur.
®
PERFORMING
ROUTINE
MAINTENANCE
NOTE: The qualified installer or agency
must use only factory-authorized
replacement parts, kits, and accessories
when modifying this product.
15
Installing and servicing of heating
equipment can be hazardous due to
gas and electrical components.
Only trained and qualified personnel
should install, repair, or service heat-
ing equipment.
Untrained personnel can perform
basic maintenance functions such as
cleaning and replacing air filters. All
other operations must be performed
by trained service personnel. Observe
safety precautions in this manual, on
tags, and on labels attached to the fur-
16
nace 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 main-
tenance, follow these safety precautions:
WARNING
!
Turn off electrical power sup-
ply to your furnace before re-
moving the main furnace door
to service or perform mainte-
nance. Failure to follow this
warning could result in per-
sonal injury or death.
CAUTION
!
Although special care has
been taken to minimize sharp
17
edges, be extremely careful
when handling parts or reach-
ing into the furnace.
FILTERING OUT TROUBLE
Never operate your furnace
without the air filter in place.
Doing so may damage the fur-
nace blower motor. An accu-
mulation of dust and lint on
internal parts of your furnace
can cause a loss of efficiency.
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 unattended, the furnace will eventu-
ally lock out. It is recommended 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 instruc-
tions. To inspect, clean, and/or replace
the air filter(s), follow these steps:
1. Turn off electrical supply to the
2. Remove main furnace door.
3. Remove blower access panel.
NOTE:
2 screws.
4. Remove air filter from furnace.
• AIR FILTER(S) LOCATED IN
6
CAUTION
!
furnace. (See Fig. 16.)
(See Fig. 18.)
(See Fig. 19.)
It will be necessary to remove
END OF FURNACE:
a. Slide filter retainer sideways until
it is free of latch. (See Fig. 20.)
18
19