Shutting Down Your Furnace; Performing Routine Maintenance; Filtering Out Trouble - Bryant 376CAV Information Manual

NOTE: If the main burners fail to ig-
nite, the furnace control system will go
through 3 more ignition cycles. Then,
if burners fail to ignite, the system will
lockout. If lockout occurs, or the
blower doesn't come on—shut down
your furnace and call your dealer for
service.
12. Set your thermostat to the tempera-
ture that satisfies your comfort re-
quirements. SUGGESTION:
Setting the thermostat back a few
degrees—and compensating for the
difference with warmer clothing—
can make a big difference in your
fuel consumption on extremely
cold days. The few degrees at the
top of your thermostat "comfort
level'' are the most costly degrees
to obtain.
When the room temperature drops
below the temperature selected on the
thermostat, the furnace will be
switched on automatically. When the
room temperature reaches the degree
selected on the thermostat, the furnace
will be automatically switched off.
Some thermostats have a "fan'' switch
with 2 selections: AUTO or ON. When
set on AUTO, the furnace blower cy-
cles on and off, controlled by the ther-
mostat. In the ON position, the furnace
blower runs continuously except for a
45-sec delay at the "call for heat.'' This
keeps the temperature level in your
home more evenly balanced. It also
continuously filters the indoor air.
SHUTTING DOWN
YOUR FURNACE
Should you ever suspect a malfunction
in your furnace, you will need to turn
the furnace off. The following proce-
dures must be followed:
1. Set your room thermostat to
the lowest temperature setting.
(See Fig. 18.)
2. Close the external manual gas
valve. (See Fig. 8 on page 5.)
3. Turn OFF the electrical supply to
your furnace. (See Fig. 19.)
4. Remove the control access door on
your furnace. (See Fig. 10 or 11.)
On upflow furnaces, removing the
blower access door is not required.
5. Turn the control knob on the
gas valve to the OFF position.
(See Fig. 20.)
70
90
50
90
50
70
FAN
SYSTEM
AUTO ON
COOL OFF HEAT
6. Replace the control access door.
(See Fig. 14 or 15.)
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:
6
WARNING
!
Turn off electrical power sup-
ply to your furnace before re-
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
!
18
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reach-
ing into the furnace.
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
19
cleaned if necessary.
If your furnace filter needs replacing,
be sure to use the same size and type of
filter that was originally supplied. Use
the Furnace Filter Table and compare
your furnace size with the proper filter
size.
CAUTION
!
Never operate your furnace
without a filter in place. Doing
so may damage the furnace
blower motor. An accumula-
20
tion of dust and lint on internal
parts of your furnace can
cause a loss of efficiency.
The air filter for upflow furnaces is
normally located in the blower com-
partment. Filters for the downflow fur-
naces are normally located in the return
air plenum above the blower. If the fil-
ters have been installed in another lo-
cation, contact your dealer for
instructions. To inspect, clean and/or
replace the air filter(s), follow these
steps:
• UPFLOW FURNACES ONLY:
1. Turn OFF the electrical supply to
the furnace. (See Fig. 19.)
2. Remove control and blower access
doors.