Vermont Casting DVRSR - Manual (Page 18)

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GENERAL INFORMATION ON ASSEMBLING
THE TWIST LOCK VENT PIPES
When using CFM Majestic twist lock pipe it is not neces-
sary 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 horizontal termina-
tion connection (when necessary).
To join the pipes together, simply align the beads of the
male end with the grooves of the female end and while
joining the two together, twist the pipe until the flange on
the female end touches the external bead on the male
end. Secure the joints with three sheet metal screws.
To make easier to assembly, we suggest putting lubri-
cant (vaseline or similar) on the male end of the twist
lock pipe.
TWIST LOCK PIPE JOINT
Screw Holes
Crimped pipe and new twist lock pipe.
It is possible to use CFM Majestic 4" & 7" direct vent
crimped pipe and elbows in your system, with the new
CFM Majestic 4" & 7" Direct Vent Twist Lock Pipe.
You must use the crimped pipe first in the system off
the appliance.
1. Install expanded end of crimped pipe or elbow onto
the 4" & 7" collars off the fireplace with high tem-
perature sealant and 3 screws.
2. If you wish to continue your system with your 4" & 7"
crimped pipe or elbow apply high temperature
sealant on crimped end of pipe at 2" in from end and
fasten the next pipe with 3 sheet metal screws.
3. When you wish to continue your system with the
New Twist Lock pipe or elbow, apply high tempera-
ture sealant on crimped end of pipe at 1-1/2" from
end, and slip the female end of the twist lock pipe
over the crimped end of the pipe and secure with 3
sheet metal screws. Continue the installation with
twist lock pipe placing the female end over the male
end and fastening with 3 sheet metal screws.
TOP VIEW
CROSS CORNER VENT
TO THE LEFT.
20"
508mm
45 °
TOP VIEW
CROSS CORNER VENT
TO THE RIGHT.
20"
508mm
45 °
Fig. 36
TOP VIEW
20" (508mm)
Fig. 35
Minimum clearances between vent pipe and com-
bustible materials are as follows:
Top - 2" (50 mm)
Sides - 1" (25 mm)
Bottom - 1" (25 mm)
Note: Vent Starter Kit Model 7TDVRVT must be
used in rear vent applications.
Maximum Vent Length ......................................... 20" - Fig. 35
............................. 20" - With 45 Elbow
Maximum Number of Elbows .............. One 45" Elbow - Fig.36
REAR VENTING APPLICATIONS
Note: It is not necessary to seal the vent pipe joints
for any rear vent applications.
You do not have to use high temperature sealant
when using twist lock pipe between the female and
male ends of the twist lock.
Except on: 1.Adjustable lengths (telescoping joint only)
2.Crimped collar on existing fireplaces.
3.Terminations where required.