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Twist Lock Pipes
When using Vermont Castings Group twist-lock pipe, it is
Vermont Castings Group 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 joint 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 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.
Male End
Screw Holes
Fig. 13 Twist-lock pipe joints.
36CDVZR Venting
How to Use the Vent Graph
TWL100
Twist Lock Pipe
The vent chart should be read in conjunction with the
3/12/99 djt
following vent installation instructions to determine the
relationship of the vertical and horizontal dimensions of
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. 14) locate the point
intersecting with 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.
Example A:
If the vertical dimension from the floor of the
fireplace is 11' (3.4 m) the horizontal run to the face
of the outer wall must not exceed 14' (4.3 m).
Example B:
If the vertical dimension from the floor of the unit is
7' (2.14 m), the horizontal run to the face of the outer
wall must not exceed 8¹⁄₂' (2.6 m).
20014621
twist-lock pipe, it is
Female End
TWL100
CDVZ Series Direct Vent Gas Fireplace
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Horizontal dimension from the outside face of the
wall to the center of the fireplace vent flange
CFM102
Sidewall vent graph showing the relationship between vertical
DV Graphic
and horizontal dimensions for a Direct Vent flue system.
9/28/00 sta
Fig. 14 Sidewall venting graph. (Dimensions in feet)
Rear Wall Venting Applications
* Exterior Outside Wall
7" (178 mm) to 20" (508 mm)
From Rear of Unit *
With this application, the following rigid pipe kits may be
used:
7" to 13" (178 - 330 mm) to outside wall: 7TCRVT
13" to 20" (330 - 305 mm) to outside wall: 7TCRVT1320
45° elbow with 20" (508 mm) Starter for corner applica-
tions
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 Vermont Castings Group venting components
Vermont Castings Group venting components
are approved to be used in these applications. (Refer
to "Venting Components" listed for different installation
requirements)
•
The maximum straight out the back horizontal
distance between the rear of the appliance and the
outside face of the rear wall is 20" (508 mm). The
minimum is 7" (178 mm). (Fig. 15)
eg: A
eg: B
venting components
13
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