Steps For Starting Your Furnace - Bryant 373LAV User's Information Manual

safety-alert symbol. DANGER identi-
fies the most serious hazards which will
result in severe personal injury or
death. WARNING signifies hazards
which could result in personal injury or
death. CAUTION is used to identify
unsafe practices which would result in
minor personal injury or product and
property damage.
STARTING YOUR
FURNACE
Instead of a continuously burning pilot
flame, your furnace uses an automatic
hot surface ignition system to light the
burners each time the thermostat sig-
nals the furnace to start. Follow these
important safeguards:
• Never attempt to manually light the
burners with a match or other source of
flame.
• Read and follow the operating in-
structions on the furnace, especially the
item that reads as follows:
Wait 5 minutes to clear out any gas.
Then smell for gas, including near the
floor. If you smell gas, STOP! Follow
"B'' in the safety information above on
this label. If you don't smell gas, go to
the next step.
• If a suspected malfunction occurs
with your gas control system, such as
the burners do not light when they
should, refer to the shutdown proce-
dures on the furnace, or in the next sec-
tion, to turn off your system, then call
your dealer as soon as possible.
WARNING
!
Should overheating occur, or
the gas valve fail to shut off the
gas supply, turn off the manual
gas valve (See Fig. 8) to the fur-
nace BEFORE turning off the
electrical supply. A failure to
follow this warning could re-
sult in a fire or explosion, and
personal injury or death.
• CHECK AIR FILTER: Before at-
tempting to start your furnace, be sure
the furnace filter is clean and in place.
(See the maintenance section of this
manual.) Then proceed as follows:
STEPS FOR STARTING
YOUR FURNACE
1. Set your room thermostat to the
lowest temperature setting. (See
Fig. 7.)
2. Close the external manual gas
valve. (See Fig. 8.)
3. Turn OFF the electrical supply to
your furnace. (See Fig. 9.)
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4
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4. Remove the furnace access door(s).
a. Downflow/Horizontal—remove
blower door after removing
2 screws first, then remove the
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control door. (See Fig. 10.)
b. Upflow—remove control door.
(See Fig. 11.)
5. The gas valve will have EITHER a
control knob or control switch to
turn off and on. Turn the control
knob or switch on the gas valve to
the OFF position and wait 5 min-
utes. (See Fig. 12 or 13.)
6. After waiting 5 minutes, turn the
control knob or switch on the gas
valve to the ON position. (See Fig.
14 or 15.)
7. Replace the access door(s). See
Fig. 16 for upflow and Fig. 17 for
downflow. Replace control door
first on downflow furnaces. Then
replace blower door (secure with
2 screws).
8. Turn ON the electrical supply to
the furnace. (See Fig. 18.)
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9. Open the external manual gas
valve. (See Fig. 19.)
10. Set the room thermostat to a tem-
perature slightly above the room
temperature. This will automati-
cally signal the furnace to start. The
inducer motor will start, and the hot
surface ignitor will energize. When
hot, the ignitor will have an orange
glow.
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