Bryant 340MAV Concentric Vent/Air Termination Kit, IV. Multiventing and Vent Terminations

TABLE 8—MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATION IN WINTER

DESIGN TEMPERATURE AMBIENT*

FURNACE	WINTER DESIGN	MAX PIPE	WITHOUT	WITH 3/8–IN. OR
	TEMPERATURE	DIAMETER
SIZE			INSULATION	THICKER INSULATION†
	(°F)	(IN.)
	20	1.5	51	70
	0	1.5	28	70
040	-20	1.5	16	70
	20	2	45	70
	0	2	22	70
	-20	2	10	58
	20	2	65	70
060	0	2	35	70
	-20	2	20	70
	20	2	55	55
	0	2	48	55
080	-20	2	30	55
	20	2.5	70	70
	0	2.5	47	70
	-20	2.5	28	70
	20	2.5	40	40
	0	2.5	40	40
100	-20	2.5	38	40
	20	3	70	70
	0	3	50	70
	-20	3	28	70
	20	3	70	70
	0	3	61	70
120	-20	3	37	70
	20	4	70	70
	0	4	48	70
	-20	4	23	70
	20	3	60	60
	0	3	60	60
140	-20	3	44	60
	20	4	70	70
	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 7.

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

5.Check required dimensions as shown in Fig. 36, 39, or 40.

C.Concentric Vent/Air 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 it will not be affected by wind eddy (such as inside building corners) or that may 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.

2.Cut one 4-in. diameter hole for 2-in. kit, or one 5-in. diameter hole for 3-in. kit.

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3.Loosely assemble concentric vent/air termination compo- nents together using instructions in kit.

4.Slide assembled kit with rain shield REMOVED through hole.

NOTE: Do not allow insulation or other materials to accumulate inside of pipe assembly when installing it through hole.

Roof terminations—Locate assembly through roof to ap- propriate height as shown in Fig. 37.

Sidewall terminations—Locate assembly through sidewall with rain shield positioned no more than 1-in. from wall as shown in Fig. 38.

5.Disassemble loose pipe fittings. Clean and cement using same procedures as used for system piping.

6.Check required dimensions as shown in Fig. 37 or 38.

IV. MULTIVENTING AND VENT TERMINATIONS

When 2 or more 340MAV Furnaces are vented near each other, each furnace must be individually vented. NEVER common vent or breach vent 340MAV furnaces. When 2 or more 340MAV furnaces are vented near each other, 2 vent terminations may be installed as shown in Fig. 41, 42, 43, 44, and 45, but next vent termination must be at least 36 in. away from first 2 terminations.