Vermont Casting DVRTSB manual General Information for Connecting Vent Pipes, Twist Lock Pipes

DVRTSB Bay Window Fireplace

Termination Clearances

Termination clearances for buildings with combustible and noncombustible exteriors.

Inside Corner Outside Corner Alcove Applications*

			F =
	G =		Combustible
G	Combustible		6"	(152 mm)
	6" (152 mm)	V	Noncombustible
			2"	(51 mm)
	Noncombustible
V			F
	2" (51 mm)

Balcony -	Balcony -
with no side wall	with perpendicular side wall

M	M
V	V
	P
M =	Combustible &
	Noncombustible
Combustible &
	M = 24" (610 mm)
Noncombustible
	P = 20” (508 mm)
12" (305 mm)

D

C C

V

E

O

E = Min. 6” (152 mm) for non-vinyl sidewalls Min. 12” (305 mm) for vinyl sidewalls

O = 8’ (2.4 m) Min.

No.
of Caps	DMin.	CMax.
1	3’ (.9 mm)	2 x DActual
2	6’ (1.8 m)	1 x DActual
3	9’ (2.7 m)	2/3 x DActual
4	12’ (3.7 m)	1/2 x DActual

DMin. = # of Termination caps x 3

CMax. = (2 / # termination caps) x DActual

584-15

*NOTE: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions specified for vinyl or non-vinyl siding and soffits. 1. There must be a 3’ (914 mm) minimum between termination caps. 2. All mechanical air intakes within 10’ (1 m) of a termination cap must be a minimum of 3’ (914 mm) below the termination cap. 3. All gravity air intakes within 3’ (914 mm) of a termination cap must be a minimum of 1’ (305 mm) below the termination cap.

Fig. 12a Termination clearances.

General Information for Connecting Vent Pipes

Canadian Installations:

Venting system must be installed in accordance with the current CSA-B149.1 installation code.

USA Installations:

The venting system must conform with local codes and/ or the current National Fuel Gas code ANSI Z223.1/ NFPA 54.

Only direct vent components manufactured by CFM Corporation can be used in Direct Vent systems.

Twist Lock Pipes

When using CFM Corporation twist-lock pipe it is not necessary to use sealant on the joints. The only areas of the venting system that need to be sealed with high temperature silicone sealant are the sliding joints of any telescopic vent section used in the system.

12

To join the twist lock pipes together, simply align the beads of the male end with the grooves of the female end, twisting the pipe until the flange on the female end contacts the external flange on the male end. It is recommended that you secure the joints with three (3) sheet metal screws, however this is not mandatory with twist lock pipe.

NOTE: For ease of assembly, use a lubricant (Vaseline or similar substance) on male end of twist lock pipe prior to assembly.

	Male End	Female End
	Screw Holes	TWL100
Fig. 14	Twist-lock pipe joints.
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