Bryant 349MAV - Manual (Page 9)

17
A91185
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 out­
side 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.
A
CAUTION;
If your furnace makes an especially loud
noise -when the main burners light, shut down your furnace
and call your dealer.
To inspect the combustion area and vent system, you will need
a flashlight. Refer to Figure 2, and proceed as follows:
1. Tbrn OFF the electrical supply to your furnace.
2. Remove burner enclosure front.
Inspect the gas burners for dirt, rust, or scale. (See Figure 18.)
Then inspect the vent outlet area and vent pipe.
A
CAUTION:
If dirt, rust, soot, or scale accumulations are
found, call your dealer.
Do not operate your furnace.
. 3. Inspect the vent pipe for sag, holes, cracks, or dis­
connection. Any horizontal vent pipe must slope upward,
away from the furnace; look for signs of water leakage.
A
DANGER;
Ifholes are found in the vent pipe, or if it has
become disconnected, toxic fumes can escape into your
., home. DO NOT OPERATE YOUR FURNACE. Call your
dealer for seridce.
4. Reinstall the burner enclosure front.
5. If your furnace is free of the above conditions, restore elec­
trical power to your furnace. (See Figure 10.)
6. Start your furnace and observe its operation. Watch the
burner flames to see if they are bright blue. (See Figure 19.)
If you observe a suspected malfunction, or that the burner
flames are not bright blue, call your dealer.
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°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. Thrn OFF electrical supply to furnace. (See Figure 8.)
3. Disconnect drain tube from bottom of inducer vent outlet.
(See Figure 20.)
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 Figure 21.)
6. Reconnect drain tube to vent outlet.
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