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116035-01J12
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. Hori-
zontal installations using round termination
require exterior portion of wall restop (see
Figure 20, page 15).
1. Set replace in its desired location and
determine 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 18 through 25 on pages 14
through 17 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 11).
Note: Horizontal runs of vent must be sup-
ported every three feet. Use wall straps
for this purpose.
3. Any straight pipe section, a 45° or 90°
elbow can be used when rst connecting
the venting system to replace. Elbows
are designed to twist-lock into any of four
90° positions to direct the venting system
to the desired location. IMPORTANT: Do
not attempt to alter the 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
Figure 11 - Vent Pipe Connections
Figure 12 - Vent Opening Requirements
Center
of Hole
5. Carefully determine location where vent
pipe assembly will penetrate outside wall.
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
square hole in exterior wall where vent will
be terminated. If wall being penetrated is
constructed of noncombustible material,
such as masonry block or concrete, a
8
1
/
2
" hole with zero clearance is accept-
able (see Figure 12).
Female
Locking Lugs
Male
Slots
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