Desa DVF36TCR - Manual (Page 12)

www.desatech.com 112108-01C 12
VENTING INSTALLATION
INSTRUCTIONS
Continued
Figure 16 - Installing Horizontal Vent Cap
(Noncombustible Exterior)
Wood Screw
Vent Cap
Figure 17 - Installing Siding Standoff
(Combustible Exterior Wall)
Cut Siding Away to
Fit Standoff
Wood
Screw
Screws
Standoff
Vent
Cap
Apply Mastic
to All Four Sides
Twist-lock Procedure:
The female ends of the
pipes and fittings have four locking lugs (in-
dentations). These lugs will slide straight into
matching slots on the male ends of adjacent
pipes and fittings. (All connections must be
sealed with high temperature silicone sealant
as specified in the second warning statement
on page 10.) Push the pipe sections together
and twist one section clockwise approximately
one-quarter turn until the sections are fully
locked. See Figure 14. Note: Horizontal runs
of vent must be supported every three feet. Use
wall straps for this purpose.
3. Attach vent pipe assembly to the fireplace using
twist lock connections. Set fireplace in front of
its permanent location to insure minimum clear-
ances. Mark the wall for a 10 3 /
4
" square hole (for
noncombustible material such as masonry block
or concrete, a 8 1 /
2
" diameter hole is acceptable).
See Figure 15. The center of the hole should
line up with the centerline of the rigid vent
pipe. Cut a 10 3 /
4
" x 10 3 /
4
" square hole through
combustible exterior wall (8 1 /
2
" diameter hole
if noncombustible). Frame as necessary.
4.
Noncombustible Exterior Wall:
Apply a bead
of non-hardening mastic around the outside
edge of the vent cap. Position the vent cap in the
center of the hole on the exterior wall with the
arrow on the vent cap pointing up. Attach the
vent cap with four wood screws provided (see
Figure 16). Note: Replace the wood screws
with appropriate fasteners for stucco, brick,
concrete, or other types of siding.
Combustible Exterior Wall:
For vinyl siding,
stucco, or wood exteriors, a siding standoff
must be installed between the vent cap and
exterior wall. The siding standoff prevents
excessive heat from damaging siding materials.
Siding materials must be cut to accommodate
standoff. Bolt the vent cap to the standoff.
Apply non-hardening mastic around outside
edge of the standoff. Position the standoff/cap
assembly in the center of the square hole and
attach to exterior wall with wood screws pro-
vided (see Figure 17). The siding standoff must
sit flush against the exterior fascia material.
Figure 14 - Vent Pipe Connections
Male
Slots
Female
Locking
Lugs
Figure 15 - Vent Opening Requirements
(Framing
Detail)
10 3 / 4 "
10 3 / 4 " Inside Framing
10 3 /
4
"
8 1 / 2 "
Vent Opening
Combustible Wall
Vent Opening
Noncombustible Wall