Desa VM42P installation manual Typical B-Vent Configuration, Roof Pitch

VENTING INSTALLATION

Continued

		Listed
		Vent Cap			Listed	Listed
					Vent Cap
						Vent Cap
	Maintain		Maintain
			Listed			Maintain
	Listed
			Clearance		Maintain	Listed
	Clearance
			Support Each		Listed	Clearance
			Lateral At		Clearance
			Least Every	45
		60	Six (6) Feet		12' Min.
	8'	6'			45	10'
12' Min.	Position			45	Position	12' Min.
			Position
	Firestop		Firestop		Firestop
		Maintain		Maintain		Maintain
		Listed		Listed		Listed
		Clearance		Clearance		Clearance

EXAMPLE 1 EXAMPLE 2 EXAMPLE 3

Figure 10 - Typical B-Vent Configuration

B-type connectors and the existing system must be code inspected for damage and proper installation.

It is not recommended that this appliance be com- mon vented with an existing gas burning appliance. However, if it becomes necessary to common vent this appliance, the venting system must be sized and configured in accordance with the common venting guides Appendix G of the current National Fuel Gas Code ANSI Z223.1/NFPA 54 and in Canada with CAN/CGA B149.

Lowest Listed

Discharge Vent Cap

Opening

8 Ft. Min.

Listed Gas

Vent

12

H(Min) Height From Roof

x

Roof Pitch x/12 Listed Clearance

Note: Before connecting this appliance to an existing vent system or a common venting sys- tem consult with your local architect, planner or building official.

WARNING: This appliance must be properly connected to a system and must not be connected to a chimney flue servicing a separate solid fuel burning appliance.

	H (Min.)
Roof Pitch	Ft.	m
Flat to 6/12	1.0	ax0.30
6/12 to 7/12	1.25	0.38
Over 7/12 to 8/12	1.5	0.46
Over 8/12 to 9/12	2.0	0.61
Over 9/12 to 10/12	2.5	0.76
Over 10/12 to 11/12	3.25	0.99
Over 11/12 to 12/12	4.0	1.22
Over 12/12 to 14/12	5.0	1.52
Over 14/12 to 16/12	6.0	1.83
Over 16/12 to 18/12	7.0	2.13
Over 18/12 to 20/12	7.5	2.27
Over 20/12 to 21/12	8.0	2.44

Figure 11 - B-Vent Terminations

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