Vermont Casting DVBR42 Manuel D’Utilisation

13

TWL100

Twist Lock Pipe

3/12/99   djt

Male End

Female 

End

Screw Holes

TWL100

Fig. 17 Twist-Lock pipe joints.

When using CFM Corporation twist-lock pipe, it is not 
necessary to use silicone to seal the twist-lock joints. 
The only areas that need silicone are the collars on the 
fireplace, the telescoping pipe (if used) and the hori-
zontal termination connection (when necessary). The 
female (flared) end secures to the fireplace first with the 
male end away from the fireplace.
To join the 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 touches the 
external bead on the male end. Secure the joints with 
three (3) sheet metal screws. (Fig. 17)
To make assembly easier, apply lubricant (vaseline or 
similar) on the male end of the twist-lock pipe. 

The Vent Graph should be read in conjunction with the 
following vent installation instructions to determine the 
relationship between the vertical and horizontal dimen-
sions to the vent system.
1.  Determine the height of the center of the horizontal 

vent pipe exiting through the outer wall.  Using this 
dimension on the Sidewall Vent Graph (Fig. 18), 
locate the point intersecting with the slanted graph 
line. 

2.  From the point of this intersection, draw a vertical 

line to the bottom of the graph.

3.  Select the indicated dimension, and position the 

fireplace in accordance with same. 

A: 

If the vertical dimension from the floor of the unit is 11 
feet (3352 mm) the horizontal run to the face of the 
outer wall must not exceed 14’ (4267 mm).

EXAMPLE B: 

If the vertical dimension from the floor of the unit is 7’ 
(2133mm), the horizontal run to the face of the outer 
wall must not exceed 8¹⁄₂’ (2590 mm).

When installed as a rear vent unit this appliance may be 
vented directly to a termination located on the rear wall 
behind the appliance.

• 

Only CFM Corporation venting components are ap-
proved to be used in these applications (See ‘Venting 
Components’ listed for different installation require-
ments).

• 

The maximum horizontal distance between the rear 
of the appliance (or end of the transition elbow in a 
corner application) and the outside face of the rear 
wall is 20” (508mm). (Fig. 19, 20 )

• 

Only one 45° elbow is allowed in these installations.

• 

Minimum clearances between vent pipe and com-
bustible materials are as follows:

 

Top - 2” (51 mm)

 

Sides - 1” (25 mm)

 

Bottom - 1” (25 mm)

V

ertical Dimension from the Floor of the Unit

to the Center of the Horizontal V

ent Pipe

Fig. 18   Sidewall venting graph. (Dimensions in feet.)

DV Graph

Horizontal Dimension from the Outside Face of the 

Wall to the Center of the Fireplace Vent Flange