Bryant 345MAV manual Reinstall burner enclosure front, See , 15, DON’T Forget Your Furnace

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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. Check the combustion-air intake adja- cent to the furnace for blockage. Also check the vent pipe on the outside of your home for blockage.

When dirt, soot, scale, or rust is allowed to build up, your furnace can suffer a loss of efficiency and perform improperly. Accumulations on the main burners can result in firing out of normal sequence. This delayed igni- tion creates an alarmingly loud sound.

!CAUTION

If your furnace makes an espe- cially 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 Fig. 2, and proceed as follows:

1.Turn off gas and electrical supplies to the furnace and remove

the main furnace door. (See Fig. 7, 8, and 9.)

2.Remove burner enclosure front. (See Fig. 29 or 30.)

Inspect the gas burners and ignitor area for dirt, rust, soot, or scale.

!CAUTION

If dirt, rust, soot, or scale accu- mulations are found, call your dealer. Do not operate your furnace.

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3.Inspect the combustion-air and vent pipes for sags, holes, cracks, or disconnections.

!DANGER

If holes are found in the pipes or if any portion has become dis- connected, toxic fumes can es- cape into your home. DO NOT OPERATE YOUR FURNACE. Call your dealer for service.

4.Reinstall burner enclosure front.

5.If your furnace is free of the above conditions, replace main furnace door and turn on electrical and gas supplies to your furnace.

(See Fig. 14, 15, and 16.)

6.Start the furnace and observe its operation. Watch the burner flames to see if they are clear blue, almost transparent. (See Fig. 31.) If you observe a suspected malfunction, or the burner flames are not clear blue, call your dealer.

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HEADING SOUTH FOR THE WINTER?

DON’T FORGET YOUR

FURNACE!

!CAUTION

If the furnace is installed in an unconditioned space where the ambient temperatures may be 32°F or lower, freeze protec- tion measures must be taken.

Since the furnace uses a condensing heat exchanger, some water will accu- mulate 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 temperatures will reach 32° F or lower unless winterized. Fol- low these procedures to winterize your furnace:

1.Obtain propylene glycol (RV/ swimming pool antifreeze or equivalent).

!CAUTION

Do not use ethylene glycol (Prestone II antifreeze coolant or equivalent). Failure of plas- tic components will occur.

2.Turn off electrical supply to the furnace. (See Fig. 18.)

3.Remove main furnace door. (See Fig. 21.)

4.Remove upper right inducer hous- ing drain connection cap.

(See Fig. 32.)

5.Connect field-supplied 1/2-in. ID tube to upper inducer housing drain connection.

6.Insert field-supplied funnel into tube.