Vermont Castings DVR28IN Operations Instructions download pdf (Page 12)

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Vermont Castings DVR28 Direct Vent Gas Fireplace

Fig. 12 Termination clearances.

General Information Assembling 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 venting components manufactured by CFM Corpo-

ration can be used in Direct Vent systems.

Outside Corner

Inside Corner

Termination Clearances

Termination clearances for buildings with combustible and noncombustible exteriors.

G =

Combustible

6" (152 mm)

Noncombustible

2" (51 mm)

F =

Combustible

6" (152 mm)

Noncombustible

2" (51 mm)

Balcony -

with no side wall

M =

Combustible &

Noncombustible

12" (305 mm)

Balcony -

with perpendicular side wall

M = 24" (610 mm)

P = 20” (508 mm)

Alcove Applications*

Combustible &

Noncombustible

E = Min. 6” (152 mm) for

non-vinyl sidewalls

Min. 12” (305 mm) for

vinyl sidewalls

O = 8’ (2.4 m) Min.

584-15

No.

of Caps D

Min.

Max.

1 3’ (914 mm) 2 x D

Actual

2 6’ (1.8 m) 1 x D

Actual

3 9’ (2.7 m) 2/3 x D

Actual

4 12’ (3.7 m) 1/2 x D

Actual

Min.

= # of Termination caps x 3

Max.

= (2 / # termination caps) x D

Actual

*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.

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.

To make it easier to assemble the joints we suggest

putting a lubricant (Vaseline or similar) on the male end

of the twist lock pipe prior to assembly.

TWL100

Twist Lock Pipe

3/12/99 djt

Male End Female End

Screw Holes

TWL100

Fig. 13 Twist-lock pipe joints.

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.

To join the twist lock pipes together, simply align the

beads of the male end with the grooves of the female

end, then while bringing the pipe together, twist the pipe

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Vermont Castings DVR28IN Operations Instructions Page 12

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