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116646-01J 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
determine the route your horizontal venting
will take. Do not secure replace until all
venting has been installed. Some installa-
tions require sliding replace in and out of
position to make nal venting connections.
Figures 14 through 18 on pages 11 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 the location of the 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 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, preas-
sembled pipe sections may be installed
as subassemblies for convenience.
VENTING INSTALLATION
Continued
5. Carefully determine location where vent
pipe assembly will penetrate the outside
wall. The center of hole should line up with
center line of horizontal vent pipe. Mark
wall for a 11
1
/
2
" x 11
1
/
2
" square hole. Cut
and frame the square hole in exterior wall
where vent will be terminated. If wall being
penetrated is constructed of noncombus-
tible material, such as masonry block or
concrete, a 8
1
/
2
" hole with zero clearance
is acceptable (see Figure 9).
WARNING: Do not recess
vent termination into any wall.
This will cause a re hazard.
(Framing
Detail)
11
1
/
2
"
11
1
/
2
" Inside Framing
11
1
/
2
"
8
1
/
2
"
Vent
O
pening
Combustible Wall
Vent Opening
Noncombustible Wall
Figure 8 - Vent Pipe Connections
Figure 9 - Vent Opening Requirements
Center
of Hole
Female Locking Lugs
Male
Slots