Bryant 340MAV instruction manual Vent Extension Pipe, 8001 to 9000³

TABLE 6ÐMAXIMUM ALLOWABLE PIPE LENGTH (FT) Continued

ALTITUDE	UNIT SIZE	TERMINATION	PIPE DIA				NUMBER OF 90° ELBOWS
		TYPE	(IN.)*	1		2		3	4	5	6
	024040	2 Pipe or 2-In.	1-1/2	46		41		36	31	29	24
	036040	Concentric	2	62		60		58	56	55	53
	024060	2 Pipe or 2-In.	1-1/2	11		6		NA	NA	NA	NA
	036060
		Concentric	2	49		44		42	37	35	34
	048060
	036080	2 Pipe or 2-In.	2	33		28		17	12	10	NA
8001 to 9000³	048080
		Concentric	2-1/2	62		60		58	56	55	53
	060080
	048100	2 Pipe or 3-In.	2-1/2	23		15		7	5	NA	NA
	060100	Concentric	3	59		54		49	44	39	34
	→060120	2 Pipe or 3-In.	3² no disk	10		NA		NA	NA	NA	NA
		Concentric	4² no disk	35		30		25	20	15	10
	→060140				NA
ALTITUDE	UNIT SIZE	TERMINATION	PIPE DIA				NUMBER OF 90° ELBOWS
		TYPE	(IN.)*	1		2		3	4	5	6
	024040	2 Pipe or 2-In.	1-1/2	42		37		32	27	25	20
	036040	Concentric	2	57		55		53	51	49	47
	024060	2 Pipe or 2-In.
	036060		2	45		40		38	33	31	29
		Concentric
	048060
	036080	2 Pipe or 2-In.	2	30		25		14	9	7	NA
9001 to 10,000³	048080
		Concentric	2-1/2	57		55		53	51	49	47
	060080
	048100	2 Pipe or 3-In.	2-1/2	21		13		5	NA	NA	NA
	060100	Concentric	3	54		49		44	39	34	29
	→060120	2 Pipe or 3-In.	4² no disk	10		5		NA	NA	NA	NA
		Concentric
	→060140				NA

* Disk usageÐUnless 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.

² Wide radius elbow.

³Vent sizing for Canadian installations over 4500 ft (1370 m) 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.

6. Use 3-in. diameter vent termination kit for installations requiring 4-in diameter pipe.

b. Reposition neoprene inducer housing outlet cap and clamp to appropriate unused inducer housing connec- tion. Tighten clamp.

WARNING: Inducer housing outlet cap must be in- stalled 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.

d.Insert 2-in. diameter pipe into inducer housing through neoprene coupling and clamp in inducer housing. Tighten clamp.

WARNING: Vent pipe 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.

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

Ð26Ð

VENT EXTENSION PIPE

Some furnaces are supplied with a PVC vent extension pipe (2-in. diameter by 12-in. long). This pipe has a built-in channel to assist vent condensate disposal. When this vent extension pipe is supplied, it must be used to connect the field vent pipe to furnace inducer housing on ALL upflow and downflow applications.

NOTE: See label on vent extension pipe for proper installation. This pipe may be shortened if an elbow is used to connect vent extension tube to field-installed vent pipe.

3.Working from furnace to outside, cut pipe to required length(s).

4.Deburr inside and outside of pipe.

5.Chamfer outside edge of pipe for better distribution of primer and cement.

6.Clean and dry all surfaces to be joined.

7.Check dry fit of pipe and mark insertion depth on pipe.

NOTE: It is recommended that all pipes be cut, prepared, and preassembled before permanently cementing any joint.

8.After pipes have been cut and preassembled, apply gener- ous layer of cement primer to pipe fitting socket and end of pipe to insertion mark. Quickly apply approved cement to end of pipe and fitting socket (over primer). Apply cement in a light, uniform coat on inside of socket to prevent buildup of excess cement. Apply second coat.