Lennox Hearth Products Spectra LSS-35CN Installation Instructions Manual page 19

It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs
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 within 5 in. (127 mm) to 9-1/4 in. (235 mm)
inboard of the exterior surface to which the
termination is to be attached, see Figure 33.
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
33, refer to Table 7 on page 20. 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 32 in the same manner as any SV4.5
vent component (refer to Step E).
L. Install Firestop/Spacer at exterior wall
- When using the square 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
32, and nail into place. (The Firestop/Spacer
may also be installed over the opening at the
interior side of the framing).
1. Install the square termination (SV4.5HT-2)
- For the last step , from outside the exterior
wall, slide the collars of the termination onto
the adapter (the outer over the outer and the
inner inside the inner) until the termination seats
against the exterior wall surface to which it will
be attached. Orient the housing of the termina-
tion with the arrow pointed upwards. Secure
the termination to the exterior wall.
Orient the housing of the termination with the
arrow pointed upwards. Secure the termination
to the exterior wall.
SFHRK Snorkel Cap –The snorkel cap is
designed to be fitted into a basement window
box. The SFHRK cap is for use with flex vent
pipe. The SV4.5HRK14 and SV4.5HRK36 are
for rigid vent pipe.
IMPORTANT: The vent termination is
hot while in operation and for a period
of time following use of the fireplace.
To prevent contact with hot surfaces,
we recommend the use of a Termination
Guard. This can be purchased at your
local dealer.
7"
(178)
12-1/8"
(308 mm)
5-1/8"
(130 mm)
Adapter
SV4.5RCH
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
Installing the Square Horizontal Termination (SV4.5HT-2).
Figure 32
Maximum Extent of
Siding
Vent Run Sections
Relative to Exterior
Surface of Framing
Last Vent Section. Use
T e l e s c o p i c
Section (SV4.5LA), If
Necessary
SV4.5HT
Square
Termination
Stucco
Note: Venting terminals shall not be recessed into
a wall or siding.
Venting Connection and Exterior Wall Recessing of the
Horizontal Square Termination (SV4.5HT).
Figure 33
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 termination
where water from eaves and adjoining rooflines may create a heavy flow of cascading 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.
10-1/2"
(267mm)
the Framed Opening.
See Figure 4 on page 5
for Min. Distance to Base
Base of Appliance
Interior Surface of
Finished Wall
V e n t
Adapter
SV4.5RCH
(Provided With The
Termination)
SV4.5 HT
Termination
3"
(76 mm)
1"
(25.4 mm)
of Appliance.
Minimum wall thickness
5 in. (127 mm)
Maximum wall thickness
9 1/4 in.(235 mm)
Exterior Surface of Siding
Exterior Surface of
Framing
5 in. to 9 1/4 in.
(127 to 235 mm)
SV4.5HT
Square Termination
1 1/4 in (32 mm)
Maximum Recess of
Either Square Termination into
Exterior Finishing Material
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