Bryant 355M-40-5 Ðmaximum Allowable Pipe Length FT, 6001 to 7000³, 7001 to 8000³, 8001 to 9000³

TABLE 6ÐMAXIMUM ALLOWABLE PIPE LENGTH (FT) Continued

ALTITUDE	UNIT	TERMINATION	PIPE DIAMETER			NUMBER OF 90° ELBOWS
	SIZE	TYPE	(IN.)*	1	2		3	4	5		6
	042040	2 Pipe or 2-In.	1-1/2	35	30		25	20	15		10
		Concentric	2	70	70		68	67	66		64
	042060	2 Pipe or 2-In.	1-1/2	35	30		25	20	15		10
		Concentric	2	70	70		68	67	66		64
6001 to 7000³	042080	2 Pipe or 2-In.	1-1/2	20	15		10	5		NA	NA
	060080	Concentric	2	70	70		68	67	62		57
	060100	2 Pipe or 2-In.	2	31	26		21	16	11		6
		Concentric	2-1/2	70	70		68	67	66		64
	060120	2 Pipe or 3-In.	3²	49	48		47	45	44		43
		Concentric
ALTITUDE	UNIT	TERMINATION	PIPE DIAMETER			NUMBER OF 90° ELBOWS
	SIZE	TYPE	(IN.)*	1	2		3	4		5	6
	042040	2 Pipe or 2-In.	1-1/2	32	27		22	17		12	7
		Concentric	2	66	65		63	62		60	59
	042060	2 Pipe or 2-In.	1-1/2	32	27		22	17		12	7
		Concentric	2	66	65		63	62		60	59
7001 to 8000³	042080	2 Pipe or 2-In.	1-1/2	18	13		8	NA		NA	NA
	060080	Concentric	2	66	65		63	62		57	52
	060100	2 Pipe or 2-In.	2	29	24		19	14		9	NA
		Concentric	2-1/2	66	65		63	62		60	59
	060120	2 Pipe or 3-In.	3²	46	44		43	41		40	38
		Concentric
ALTITUDE	UNIT	TERMINATION	PIPE DIAMETER			NUMBER OF 90° ELBOWS
	SIZE	TYPE	(IN.)*	1	2		3	4		5	6
	042040	2 Pipe or 2-In.	1-1/2	30	25		20	15		10	5
		Concentric	2	62	60		58	56		55	53
	042060	2 Pipe or 2-In.	1-1/2	30	25		20	15		10	5
		Concentric	2	62	60		58	56		55	53
8001 to 9000³	042080	2 Pipe or 2-In.	1-1/2	17	12		7	NA		NA	NA
	060080	Concentric	2	62	60		58	56		51	46
	060100	2 Pipe or 2-In.	2	27	22		17	12		7	NA
		Concentric	2-1/2	62	60		58	56		55	53
	060120	2 Pipe or 3-In.	3²	43	41		39	37		35	34
		Concentric
ALTITUDE	UNIT	TERMINATION	PIPE DIAMETER			NUMBER OF 90° ELBOWS
	SIZE	TYPE	(IN.)*	1	2		3	4		5	6
	042040	2 Pipe or 2-In.	1-1/2	27	22		17	12		7	NA
		Concentric	2	57	55		53	51		49	47
	042060	2 Pipe or 2-In.	1-1/2	27	22		17	12		7	NA
		Concentric	2	57	55		53	51		49	47
9001 to 10000³	042080	2 Pipe or 2-In.	1-1/2	15	10		5	NA		NA	NA
	060080	Concentric	2	57	55		53	51		46	41
	060100	2 Pipe or 2-In.	2	24	19		14	9		NA	NA
		Concentric	2-1/2	57	55		53	51		49	47
	060120	2 Pipe or 3-In.	3²	39	37		35	33		31	29
		Concentric

*Disk usageÐUnless otherwise stated, use perforated disk assembly (factory-supplied in loose parts bag). ² Wide radius elbow.

³ Vent sizing for Canadian installations over 4500 ft (1370m) above sea level are subject to acceptance by the local authorities having jurisdiction. NAÐNot 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. Long 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 for all applications.

Ð25Ð