Desa (V)VC36N Series - Manual (Page 10)

www.desatech.com 116200-01H 10
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 14,
page 12).
1. Set the fireplace in its desired location and
determine the route your horizontal venting
will take. Do not secure the fireplace until
all venting has been installed. Some installa-
tions require sliding the fireplace in and out
of position to make final venting connections.
Figures 14 through 18 on pages 12 through
14 show different configurations 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 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 sections 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 fireplace flue 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 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 8 - Vent Pipe Connections
Female
Locking Lugs
Male
Slots
(Framing
Detail)
10 3 /
4
"
(27.3 cm)
10 3 / 4 " Inside Framing
(27.3 cm)
10 3 /
4
"
(27.3 cm)
8 1 /
2
"
(21.6 cm)
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 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 9).