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111987-01D 9
INSTALLATION PLANNING
There are two basic types of direct-vent in-
stallation:
• 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 available only in
vent kit HTK (see Figure 14, page 11).
1. Set the replace in its desired location and deter-
mine the route your horizontal venting will take.
Do not secure the replace until all venting has
been installed. Some installations require sliding
the replace in and out of position to make nal
venting connections. Figures 14 through 18 on
page 10 show different congurations for vent-
ing 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 connections.
Twist-Lock Procedure: The female ends of the
pipes have locking lugs (indentations). These
lugs will slide straight into matching slots on
the male ends of adjacent pipes. Push pipe sec-
tions together and twist one section clockwise
approximately one-quarter turn until the 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 system
to replace ue collar. The elbow is designed
to be twist-locked onto the flue collar as
described in step 2. IMPORTANT: Do not
attempt to alter the conguration of the elbow
by cutting, twisting, bending, etc.
4. Assemble the desired combination of pipe and
elbows to the replace ue collar. If there are
long portions of venting run, pre-assembled
pipe sections may be installed as subassem-
blies for convenience.
VENTING INSTALLATION
INSTRUCTIONS
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 the
vent pipe assembly will penetrate the outside
wall. The center of the hole should line up
with the center-line of the horizontal vent pipe.
Mark the wall for a 10" x 10" square hole. Cut
and frame the square hole in the exterior wall
where the vent will be terminated. If the wall
being penetrated is constructed of noncom-
bustible material, such as masonry block or
concrete, a 7
3
/
4
" hole with zero clearance is
acceptable (see Figure 9).