Bryant 355MAV IntakeHousing Plug Fitting Drain, 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	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 9000‡	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.	3†	43	41		39	37	35	34
		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	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 10,000‡	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.	3	39	37		35	33	31	29
		Concentric

Disk usage-Unless otherwise specified, use perforated disk assembly (factory-supplied in loose parts bag) †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 of these two diameters 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.

If use of this drain connection is desired, drill out fitting’s tap plug with a 3/16-in. drill and connect a field-supplied 3/8-in. tube. This tube should be routed to open condensate drain for furnace and A/C (if used), and should be trapped. (See Fig. 38.)

	COMBUSTION AIR
3/8" ID TUBE	INTAKE HOUSING
	BURNER
	BOX

3/16"

DRILL

TRAP

TO OPEN

DRAIN

COMBUSTION

AIR PIPE

4″

(102mm)

MIN

A93035

Fig. 38—Intake Housing Plug Fitting Drain

2.Attach vent pipe to furnace as follows:

a.Determine location of vent pipe connection to inducer housing as shown in Fig. 36 for application.

b.Reposition elastomeric (rubber) inducer housing outlet cap and clamp to appropriate unused inducer housing connection. Tighten clamp.

WARNING: Inducer housing outlet cap must be installed and fully seated against inducer housing. Clamp must be tightened to prevent any condensate leakage. Failure to follow this warning could result in electrical shock, fire, personal injury, or death.

c.Install pipe support (factory-supplied in loose parts bag) into selected furnace casing vent pipe hole. Pipe support should be positioned at bottom of casing hole.

—36—