Lennox Hearth Figure 30, Figure 29 - Installing Horizontal Termination

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MODELS MLDVT-30/35/40/45 • INSTALLATION INSTRUCTIONS
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 30 and Table 8.
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
30, refer to Table 8 on Page 20. This Table lists
the additional venting components needed (in
addition to the termination and adaptor) for a
particular range of wall thicknesses.
K. Attach termination adaptor - Attach the
adaptor (SV4.5RCH - provided with the termi-
nation) to the vent section or telescoping vent
section), elbow or appliance collar as shown in
Figure 29 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 29, 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 adaptor (the outer inside the outer and the
inner outside 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 1-1/4" (32 mm) as shown in Figure 30.
IMPORTANT: The vent termination is hot
while in operation and for a period of time
following the use of the fireplace. Young
children should be carefully supervised
when they are in the same area as a hot
termination. To prevent contact with hot
surfaces, we recommend the use of a
Termination Guard. See Page 36. This
can be purchased at your local dealer.
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.
Figure 30
Figure 29 - Installing Horizontal Termination
Siding
Stucco
1-1/4" Maximum Recess of
the Square Termination into
Exterior Finishing Material
Exterior Surface of
Framing
6 in. to 9-1/4 in.
(152 to 235 mm)**
Exterior Surface of Siding
Interior Surface of
Finished Wall
Maximum wall thickness
9-1/4 in.(235 mm)**
SV4.5HT-2
Square Termination
Shown
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
Last Vent Section. Use
Telescopic Vent
Section (SV4.5LA), If
Necessary
Adapter
SV4.5RCH
SV4.5HT-2
Square Termination
Shown
Venting Connection and Exterior Wall Recessing
of the Horizontal Termination
*Use silicone caulking to
seal the top and sides of
the termination, up to the
underlayment, stucco, or
masonry wall surface.
**For thicknesses greater
than 10”, see Table 10.
*Caulk
*Caulk
Firestop/Spacer (SV4.5HF) shown
on the exterior side of the wall. It
may also be installed on the
interior side.
Typical
Termination
Shown
7"
(178)
5-1/8"
(130 mm)
12-1/8"
(308 mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Frame Opening.
6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
See Figure 12 on page 9
for Min. Distance to Base
of Appliance.
Base of Appliance
3"
(76 mm)
1"
(25.4 mm)
Adapter
SV4.5RCH
10-1/2"
(267 mm)
**For thicknesses greater
than 9-1/4", see Table 8.
See Figure 13 on Page 10 for Min.
distance to Base of Appliance