Bryant 340MAV instruction manual Extended Exposed Sidewall Pipes, Two-Pipe Termination Kit

9.While cement is still wet, twist pipe into socket with 1/4 turn. Be sure pipe is fully inserted into fitting socket.

10.Wipe excess cement from joint. A continuous bead of cement will be visible around perimeter of a properly made joint.

11.Handle pipe joints carefully until cement sets.

12.Support combustion-air and vent piping a minimum of every 5 ft (3 ft for SDR-21 or -26 PVC) using perforated metal hanging strap.

13.Slope combustion-air and vent pipes toward furnace a minimum of 1/4 in. per linear ft with no sags between hangers.

14.Use appropriate methods to seal openings where vent and combustion-air pipes pass through roof or side wall.

III.CONCENTRIC VENT AND COMBUSTION-AIR TERMINATION KIT INSTALLATION

NOTE: If these instructions differ from those packaged with termination kit, follow kit instructions.

Combustion-air and vent pipes must terminate outside structure. A factory accessory termination kit must be installed in 1 of the installations shown in Fig. 30, 31, 32, 33, or 34. Four termination kits are available.

1.The 2-in. termination bracket kit is for 1-in., 1-1/2 in., and 2-in. diameter 2-pipe termination systems.

→2. The 3-in. termination bracket kit is for 2-1/2 in., 3-in., and 4-in. diameter 2-pipe termination systems.

3.The 2-in. concentric vent/air termination kit is for 1-in., 1-1/2 in., 2-in., and 2-1/2 in. diameter pipe systems when single penetration of wall or roof is desired.

→4. The 3-in. concentric vent/air termination kit is for 2-1/2 in., 3-in., and 4-in. diameter pipe systems when single penetra- tion of wall or roof is desired.

NOTE: Shaded parts in Fig. 30, 31, 32, 33, and 34 are considered to be termination. These components should NOT be counted when determining pipe diameter. Roof termination is preferred since it is less susceptible to damage, has reduced chances to take

in contaminants, and has less visible vent vapors. (See Fig. 30 or 31.) Sidewall termination may require sealing or shielding of building surfaces with a corrosive resistance material due to corrosive combustion products of vent system.

A. Extended Exposed Sidewall Pipes

Sidewall combustion-air and vent pipe terminations may be extended beyond area shown in Fig. 33 or 34 in outside ambient by insulating pipes as indicated in Table 7.

1.Determine combustion-air and vent pipe diameters, as stated above, using total pipe length and number of elbows.

2.Using winter design temperature (used in load calculations), find appropriate temperature for your application and fur- nace model.

3.Determine required insulation thickness for exposed pipe lengths.

NOTE: Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces cannot exceed total allowable pipe length as specified in Table 6.

B.Two-Pipe Termination Kit

1.Determine location for termination.

Consideration of the following should be made when determining an appropriate location for termination kit.

a.Comply with all clearance requirements as stated in Table 5.

b.Termination kit should be positioned where vent vapors will not damage plants/shrubs or air conditioning equip- ment.

c.Termination kit should be positioned so that it will not be affected by wind eddy (such as inside building corners) or allow recirculation of flue gases, airborne leaves, or light snow.

d.Termination kit should be positioned where it will not be damaged by or subjected to foreign objects, such as stones, balls, etc.

e.Termination kit should be positioned where vent vapors are not objectionable.

→TABLE 7ÐMAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATION IN WINTER DESIGN TEMPERATURE AMBIENT*

UNIT	WINTER DESIGN	MAX PIPE	WITHOUT	WITH 3/8-IN. OR
	TEMPERATURE	DIAMETER
SIZE			INSULATION	THICKER INSULATION²
	(°F)	(IN.)
	20	1-1/2	51	70
040
	0	1-1/2	28	70
	-20	1-1/2	16	70
	20	2	65	70
060
	0	2	35	70
	-20	2	20	70
	20	2-1/2	70	70
080
	0	2-1/2	47	70
	-20	2-1/2	28	70
	20	3	70	70
100	0	3	50	70
	-20	3	28	70
	20	4	70	70
120	0	4	48	70
	-20	4	23	70
	20	4	70	70
140	0	4	57	70
	-20	4	30	70

*Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length as specified in Table 6.

² Insulation thickness based on R value of 3.5 per in.

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