Bryant Plus 90i - Combustion Area and Vent System; Heading South for the Winter

COMBUSTION AREA AND VENT SYSTEM
Visually inspect the combustion area and vent system before
each heating season. Make sure that all PVC pipes leading into
the combustion area and vent are free from any cracks and sags.
Also check the combustion-air intake and vent pipes on the
outside of your home for blockage.
When dirt, soot or rust is allowed to build up, your furnace can
suffer a loss of efficiency and perform improperly. Accumula¬
tions on the main burners can result in their firing out of nor¬
mal sequence. This delayed ignition will create an alarmingly
loud sound.
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To inspect the combustion area and vent system, you will need
a flashlight. Refer to Fig. 3 or 4, and proceed as follows:
1. Tim OFF the electrical supply to your furnace and remove
the access doors. (See Fig. 10 and 11, or 12.)
2. Remove burner enclosure front. (See Fig. 31 or 32.)
Inspect the gas burners and pilot area for dirt, rust, or scale.
(See Fig. 33.) Then inspect the vent outlet area and vent pipe.
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i/ cAll your de^er, I)o not operate your furnace.
4. Reinstall the burner enclosure front.
5. If your furnace is free of the above conditions, replace the
blower access door and restore electrical power to your fur¬
nace. (See Fig. 14, or 15 and 16.)
6. Start your furnace and observe its operation. Watch the
burner flames to see if they are clear blue, almost transpar¬
ent. The pilot flame should be well defined. (See Fig. 33.) If
you observe a suspected malfunction, or that the burner
flames are not clear blue, or the pilot flame not well de¬
fined, call your dealer.
7. If your furnace is operating properly, reinstall the control
access door.
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3. I nspect the vent pipe for sag, holes, cracks, or discon¬
nection.
HEADING SOUTH FOR THE WINTER?
DON’T FORGET YOUR FURNACE!
Since the furnace uses a condensing heat exchanger, some wa¬
ter will accumulate in the unit as a result of the heat transfer
process. Therefore, once it has been operated, it cannot be
turned off and left off for an extended period of time when tem¬
peratures will reach 32 degrees F or lower, unless winterized.
Follow these procedures to winterize your furnace:
1. Mix a solution of equal amounts of ethylene glycol (Pres¬
tone II antifreeze coolant or equivalent) and water.
2. Tim OFF electrical supply to furnace. (See Fig. 10.)
3. Remove control access door. (See Fig. 11 or 12.)
4. Disconnect drain tube from bottom of inducer vent outlet.
(See Fig. 34 or 35.)
5. Insert funnel in drain tube and pour antifreeze/water solu¬
tion into furnace until it is visible at point where conden¬
sate enters open drain. (See Fig. 36.)
6. Reconnect drain tube to vent outlet.
7. Replace control access panel. (See Fig. 14 or 15.)
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