Lennox MLDVT-30NM Installation Instructions Manual page 18

J. Assemble vent run to exterior wall - If not
previously measured, locate the center of the
vent at the exterior wall. Prepare an opening as
described in Step B. Assemble the vent system
to point where the terminus of the last section is
located relative to the exterior surface to which
the termination is to be attached as shown in
Figure 28 and Table 10 on Pages 8 and 9.
If the terminus of the last section is not within
this distance, use the telescopic vent section
SV4.5LA, as the last vent section. For wall
thicknesses greater than that shown in Figure
28, refer to Table 10 on Page 9. This Table
lists the additional venting components needed
(in addition to the termination and adapter) for
a particular range of wall thicknesses.
K. Attach termination adapter - Attach the
adapter (adapter - SV4.5RCH - provided with the
termination) to the vent section or telescoping
vent section), elbow or appliance collar as shown
in Figure 27 in the same manner as any SV4.5
vent component (refer to Step E).
L. Install Firestop/Spacer at exterior wall -
When using the termination, install SV4.5HF
(Secure Vent), SF4.5HF (Secure Flex) Firestop/
Spacer over the opening at the exterior side
of the framing, long side up, with the 3 inch
spacer clearance at the top as shown in Figure
27, and nail into place.
(The Firestop/Spacer may also be installed over
the opening at the interior side of framing).
M. Install the Termination (SV4.5HT-2 or
SV4.5HTSS)
For the last step, from outside the exterior
wall, slide the collars of the termination onto
the adapter (the outer inside the outer and the
inner ouside the inner) until the termination
seats against the exterior wall surface to which
it will be attached. Orient the housing of the
termination with the arrow pointed upwards.
Secure the termination to the exterior wall. The
horizontal termination must not be recessed
into the exterior wall or siding by more than
the -/4" (32 mm) as shown in Figure 28.
IMPORTANT: The vent termination is hot
while in operation and for a period of
time following the use of the fireplace.
To prevent contact with hot surfaces,
we recommend the use of a Termina-
tion Guard. See Page 32. This can be
purchased at your local dealer.
8
7"
(78)
2-/8"
(308 mm)
5-/8"
(30 mm)
Adapter
SV4.5RCH
6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
Figure 27 -
INSTALLING HORIZONTAL TERMINATION
*Use silicone caulking to
seal the top and sides of
the termination, up to the
underlayment, stucco, or
masonry wall surface.
Maximum Extent of
Vent Run Sections
Siding
Relative to Exterior
*Caulk
Surface of Framing
Last Vent Section. Use
T e l e s c o p i c
Section (SV4.5LA), If
Necessary
*Caulk
SV4.5HT-2
Square Termination
Shown
**For thicknesses greater
Stucco
than 0", see Table 0.
Venting Connection and Exterior Wall Recessing
Figure 28
Horizontal terminations have been designed to perform in a wide range of weather condi-
tions. Our terminations meet or exceed industry standards.
When selecting the locations of your horizontal terminations, do not place the termina-
tion where water from eaves and adjoining rooflines may create a heavy flow of cascad-
ing water onto the termination cap. If the cap must be placed where the possibility of
cascading water exists, it is the responsibility of the builder to direct the water away
from the termination cap by using gutters or other means.
Take care to carefully follow the installation instructions for the termination, including
the use of silicone caulking where required.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Firestop/Spacer (SV4.5HF) shown
on the exterior side of the wall. It
may also be installed on the
interior side.
0-/2"
(267 mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Frame Opening.
See Figure 2 on page 9
for Min. Distance to Base
Base of Appliance
Interior Surface of
Finished Wall
V e n t
Adapter
SV4.5RCH
of the Horizontal Termination
Typical
Termination
Shown
3"
(76 mm)
"
(25.4 mm)
of Appliance.
Maximum wall thickness
0 in.(254 mm)**
Exterior Surface of Siding
Exterior Surface of
Framing
6 in. to 9-/4 in.
(52 to 235 mm)**
SV4.5HT-2
Square Termination
Shown
-/4" Maximum Recess of
the Square Termination into
Exterior Finishing Material