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111986-01F 9
INSTALLATION PLANNING
There are two basic types of direct-vent
installation:
• Horizontal Termination
• Vertical Termination
Horizontal Termination Installation
IMPORTANT: Horizontal square terminations
require only inner portion of wall restop.
Horizontal installations using round termina-
tion require exterior portion of wall restop
available only in vent kit HTK (see Figure
14, page 11).
1. Set replace in its desired location and de-
termine the route your horizontal venting
will take. Do not secure replace until all
venting has been installed. Some instal-
lations require sliding replace in and out
of position to make nal venting connec-
tions. Figures 14 through 18 on pages 10
through 13 show different congurations
for venting with horizontal termination that
will help you decide which application best
suits your installation. Check to see if wall
studs or roof rafters are in the path of your
desired venting route. If they are, you may
want to adjust location of replace.
2. Direct vent pipe sections and components
are designed with special twist-lock con-
nections.
Twist-Lock Procedure: Female ends of
pipes have locking lugs (indentations).
These lugs will slide straight into match-
ing slots on male ends of adjacent pipes.
Push pipe sections together and twist
one section clockwise approximately one-
quarter turn until sections are fully locked
(see Figure 8). Note: Horizontal runs of
vent must be supported every three feet.
Use wall straps for this purpose.
3. Use a 45° elbow to connect venting sys-
tem to replace ue collar. The elbow is
designed to be twist-locked onto the ue
collar as described in step 2.
IMPORTANT: Do not attempt to alter
conguration of elbow by cutting, twisting,
bending, etc.
4. Assemble desired combination of pipe
and elbows to replace ue collar. If there
are long portions of venting run, pre-
assembled pipe sections may be installed
as subassemblies for convenience.
VENTING INSTALLATION
Continued
Figure 8 - Vent Pipe Connections
Female
Locking Lugs
Male
Slots
(Framing
Detail)
10"
10" Inside Framing
10"
7
3
/
4
"
Vent Opening
Combustible Wall
Vent Opening
Noncombustible Wall
Figure 9 - Vent Opening Requirements
Center of
Hole
5. Carefully determine the location where
vent pipe assembly will penetrate outside
wall. The center of hole should line up with
center line of horizontal vent pipe. Mark
wall for a 10" x 10" square hole. Cut and
frame square hole in exterior wall where
vent will be terminated. If wall being pen-
etrated is constructed of noncombustible
material, such as masonry block or con-
crete, a 7
3
/
4
" hole with zero clearance is
acceptable (see Figure 9).
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