Bryant 353AAV manual 9001 to 10,000‡, 2743 to

COMBUSTION-AIR AND VENT PIPING FOR DIRECT VENT/2-PIPE (ALL SIZES) AND NON-DIRECT VENT/1-PIPE (SIZES 040 THROUGH 120 ONLY) APPLICATIONS (CON’T.)

ALTITUDE	UNIT SIZE			NON-DIRECT
		DIRECT VENT (2-PIPE) ONLY		VENT (1-PIPE)		NUMBER OF 90° ELBOWS
FT (M)	(BTUH)
				ONLY
		TERMINATION	PIPE DIA	PIPE DIA	1	2	3	4	5	6
		TYPE	IN. (mm)*	IN. (mm)*
		2 Pipe or 2-in	1-1/2 (38)	1-1/2 (38)	42	37	32	27	25	20
					(12.8)	(11.3)	(9.8)	(8.2)	(7.6)	(6.1)
	40,000
		Concentric	2 (51)	2 (51)	57	55	53	51	49	47
					(17.4)	(16.8)	(16.2)	(15.5)	(14.9)	(14.3)
	60,000	2 Pipe or 2-in	2 (51)	2 (51)	45	40	38	33	31	29
		Concentric			(13.7)	(12.2)	(11.6)	(10.1)	(9.4)	(8.8)
			2 (51)	2 (51)	30	25	14	9	7	NA
		2 Pipe or 2-in			(9.1)	(7.6)	(4.3)	(2.7)	(2.1)
	80,000
9001 to 10,000‡		Concentric	2-1/2 (64)	2-1/2 (64)	57	55	53	51	49	47
(2743 to 3048)					(17.4)	(16.8)	(16.2)	(15.5)	(14.9)	(14.3)
			2-1/2 (64)	2-1/2 (64)	21	13	5	NA	NA	NA
		2 Pipe or 3-in			(6.4)	(4.0)	(1.5)
	100,000
		Concentric
			3 (76)	3 (76)	54	49	44	39	34	29
					(16.5)	(14.9)	(13.4)	(11.9)	(10.4)	(8.8)
			NA	3 (76)†	39	37	35	33	31	29
		2 Pipe or 3-in.			(11.9)	(11.3)	(10.7)	(10.1)	(9.4)	(8.8)
	120,000
		Concentric
			4 (102)† no	4 (102)† no disk	10	5	NA	NA	NA	NA
			disk		(3.0)	(1.5)

* Disk usage-Unless otherwise specified, use perforated disk assembly (factory-supplied in loose parts bag).

#If one disk is stated, separate 2 halves of perforated disk assembly and use shouldered disk half. When using shouldered disk half, install screen side toward inlet box.

† Wide radius elbow.

‡ Vent sizing for Canadian installations over 4500 ft (1370 M) above sea level are subject to acceptance by the local authorities having jurisdiction. NA-Not Allowed; pressure switch will not make.

NOTES:

1.Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur.

2.Size both the combustion-air and vent pipe independently, then use the larger diameter for both pipes.

3.Assume two 45° elbows equal one 90° elbow. Wide radius elbows are desirable and may be required in some cases.

4.Elbows and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.

5.The minimum pipe length is 5 ft (1.5 M) for all applications.

6.Use 3-in. (76 mm) diameter vent termination kit for installations requiring 4-in (102 mm) diameter pipe.

353AAV

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