Bryant 331AAV, 330AAV manual Combustion Area and Vent System, Upflow Furnace AIR Filter Table

9.Replace blower access door and secure with 2 screws. Turn on electrical supply to the furnace. (See Fig. 18.)

UPFLOW FURNACE

AIR FILTER TABLE (IN.)

AIR FILTER LOCATED IN BLOWER

COMPARTMENT

FUR-			FILTER SIZE
NACE
CASING			Side		Bottom		FILTER
WIDTH		Return			Return		TYPE
14-3/16	(1) 16 x 25 x 1*				(1) 14 x 25 x 1		Cleanable
17-1/2	(1) 16 x 25 x 1*				(1) 16 x 25 x 1*		Cleanable
21		(1) 16 x 25 x 1			(1) 20 x 25 x 1*		Cleanable
24-1/2	(1 or 2) 16 x 25 x 1				(1) 24 x 25 x 1*		Cleanable
AIR FILTER LOCATED IN
		FILTER CABINET
FILTER
CABINET				FILTER		FILTER
HEIGHT (IN)				SIZE (IN)		TYPE
				(1) 16 x 25 x 1*		Cleanable
16			or (1) 16 x 25 x 4-5/16			Disposable
				(1) 20 x 25 x 1*		Cleanable
20			or (1) 20 x 25 x 4-5/16			Disposable
				(1) 24 x 25 x 1*		Cleanable
24			or (1) 24 x 25 x 4-5/16			Disposable
		DOWNFLOW
FURNACE FILTER TABLE (IN.)
FURNACE
CASING				FILTER		FILTER
WIDTH				SIZE		TYPE
14-3/16				(2) 16 x 20 x 1*		Cleanable
17-1/2				(2) 16 x 20 x 1*		Cleanable
21				(2) 16 x 20 x 1*		Cleanable
24-1/2				(2) 16 x 20 x 1*		Cleanable

*Filter provided with the furnace. Filters may be field modified by cutting filter material and support rods (3) in filters. Alternate sizes and additional filters may be ordered from your dealer.

!CAUTION

Use care when cutting support rods in filters to protect against flying pieces and sharp rod ends. Wear safety glasses, gloves, and appropri- ate protective clothing. Failure to follow this caution could re- sult in personal injury.

COMBUSTION AREA AND VENT SYSTEM

Inspect the combustion area and vent system before each heating season. An accumulation of dirt, soot, or rust can mean a loss of efficiency and improper performance. Buildups on

the main burners can cause faulty fir- ing. This “delayed ignition’’ is charac- terized by an alarmingly loud sound. If your furnace makes a loud noise when the main burners are ignited, shut down the furnace and call your servicing dealer.

Use your flashlight and follow these steps for inspecting the combustion area and vent system of your furnace:

1.Turn off the electrical supply to furnace and remove the access doors. (See Fig. 9, and 10 or 11.)

2.Carefully inspect the gas burner for dirt, rust, or scale. (See Fig. 29.) Inspect the relief box, flue connection area, and the vent pipe for rust.

NOTE: If dirt, rust, soot, or scale accu- mulations are found, call your servic- ing dealer. DO NOT OPERATE THE FURNACE.

3.Inspect the vent pipe for a sag, holes, or a disconnection. A hori- zontal vent pipe must slope upward. If rusty joints or seams, or signs of water leakages are found, call your dealer for service.

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