Desa V)CD36RN - Manual (Page 11)

www.desatech.com 116035-01E 11
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 firestop. Hori-
zontal installations using round termination require
exterior portion of wall firestop (see Figure 20,
page 14).
1. Set the fireplace in its desired location and deter-
mine the route your horizontal venting will take.
Do not secure the fireplace until all venting has
been installed. Some installations require sliding
the fireplace in and out of position to make final
venting connections. Figures 18 through 25 on
pages 13 through 16 show different configura-
tions 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 vent-
ing route. If they are, you may want to adjust the
location of the fireplace.
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 11). Note: Horizon-
tal runs of vent must be supported every three
feet. Use wall straps for this purpose.
3. Any straight pipe section, a 45° or 90° elbow
can be used when first connecting the venting
system to the fireplace. Elbows are designed
to twist-lock into any of four 90° positions to
direct the venting system to the desired loca-
tion. IMPORTANT: Do not attempt to alter
the configuration of the elbow by cutting,
twisting, bending, etc.
4. Assemble the desired combination of pipe and
elbows to the fireplace flue 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 11 - Vent Pipe Connections
Female
Locking Lugs
Male
Slots
(Framing
Detail)
10 3 /
4
"
(273 mm)
10 3 / 4 " Inside Framing
(273 mm)
10 3 /
4
"
(273 mm)
8 1 /
2
"
(216 mm)
Vent Opening
Combustible Wall
Vent Opening
Noncombustible Wall
Figure 12 - 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 3 /
4
" x 10 3 /
4
" 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 noncombustible
material, such as masonry block or concrete,
a 8 1 /
2
" hole with zero clearance is acceptable
(see Figure 12).