Bryant 355MAV instruction manual MaximumAllowable Pipe Length ft Continued

Table 7—Maximum Allowable Pipe Length (ft) (Continued)

ALTITUDE (FT)	UNIT SIZE	TERMINATION	PIPE DIA			NUMBER OF 90° ELBOWS
		TYPE	(IN.)*	1	2		3	4	5	6
	042040	2 Pipe or 2-in	1-1/2	40	35		30	25	20	15
		Concentric	2	70	70		70	70	70	70
	042060	2 Pipe or 2-in	1-1/2	40	35		30	25	20	15
		Concentric	2	70	70		70	70	70	70
4001 to 5000‡	042080	2 Pipe or 2-in	1-1/2	23	18		13	8	NA	NA
	060080	Concentric	2	70	70		70	70	70	68
	060100	2 Pipe or 2-in	2	36	31		26	21	16	11
		Concentric	2-1/2	70	70		70	70	70	70
	060120	2 Pipe or 3-in.	3†	56	55		54	53	52	52
		Concentric
ALTITUDE (FT)	UNIT SIZE	TERMINATION	PIPE DIA			NUMBER OF 90° ELBOWS
		TYPE	(IN.)*	1	2		3	4	5	6
	042040	2 Pipe or 2-in	1-1/2	37	32		27	22	17	12
		Concentric	2	70	70		70	70	70	70
	042060	2 Pipe or 2-in	1-1/2	37	32		27	22	17	12
		Concentric	2	70	70		70	70	70	70
5001 to 6000‡	042080	2 Pipe or 2-in	1-1/2	22	17		12	7	NA	NA
	060080	Concentric	2	70	70		70	70	68	63
	060100	2 Pipe or 2-in	2	33	28		23	18	13	8
		Concentric	2-1/2	70	70		70	70	70	70
	060120	2 Pipe or 3-in.	3†	53	52		50	49	48	47
		Concentric
ALTITUDE (FT)	UNIT SIZE	TERMINATION	PIPE DIA			NUMBER OF 90° ELBOWS
		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 7000‡	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.	3†	49	48		47	45	44	43
		Concentric
ALTITUDE (FT)	UNIT SIZE	TERMINATION	PIPE DIA			NUMBER OF 90° ELBOWS
		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 8000‡	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.	3†	46	44		43	41	40	38
		Concentric

See notes at end of table.

NOTE: A 2-in. diameter pipe must be used within the furnace casing. Make all pipe diameter transitions outside furnace casing.

g.Drill a 1/8-in. hole in 2-in. combustion-air pipe using hole in intake housing as a guide.

h.Install a field-supplied No. 6 or No. 8 sheet metal screw into combustion-air pipe.

NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake housing or fitting may cause air leakage to occur.

NOTE: Do not attach combustion-air intake pipe permanently to combustion-air intake housing since it may be necessary to remove pipe for service of ignitor or flame sensor.

Combustion-Air Intake Housing Plug Fitting: The combustion-air intake plug fitting must be installed in unused combustion-air intake housing. This fitting must be attached by using RTV sealant, or by drilling a 1/8-in. hole in fitting, using hole in intake housing as a guide. Install a field-supplied No. 6 or No. 8 sheet metal screw.

NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake housing or fitting may cause air leakage to occur.

A plugged drain connection has been provided on this fitting for use when moisture is found in combustion-air intake pipe and combustion box.

NOTE: Moisture in combustion-air intake may be result of improper termination. Ensure combustion-air intake pipe termination is similar to that shown in Fig. 39, 40, 41, 42, and 43 so it will not be susceptible to areas where light snow or other sources of moisture could be pulled in.

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