Lennox Hearth Direct Vent MPD-40 Series - Manual (Page 17)

17
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
SV4.5 HT-2
Termination
10-1/2"
(267mm)
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 Framed Opening.
6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
See Figure 9 on page 8
for Min. Distance to Base
of Appliance.
Base of Appliance
3"
(76 mm)
1"
(25.4 mm) Adapter
SV4.5RCH
To help minimize water infiltration it is
recommended that the Firestop/Spacer
(SV4.5HF) be installed on the exterior
side of the wall.
Figure 32
Figure 33
Horizontal terminations have been designed to perform in a wide range of weather
conditions. 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.
Siding
Stucco
1-1/4" Maximum Recess of
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
10 in.(254 mm)**
SV4.5HT-2
Square Termination
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
Last Vent Section. Use
T e l e s c o p i c V e n t
Section (SV4.5LA), If
Necessary
Adapter
SV4.5RCH
SV4.5HT-2
Square Termination
Venting Connection and Exterior Wall Recessing of the
Horizontal Square Termination (SV4.5HT-2).
*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 4.
*Caulk
*Caulk
M. Install the desired termination -
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
32, refer to Table 4 on page 18. This table lists
the additional venting components needed (in
addition to the termination and adapter) for a
particular range of wall thicknesses.
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. The hori-
zontal termination must not be recessed into
the exterior wall or siding by more than the 1-
1/4" (32 mm) as shown in
Figure 33.
SVHRK Snorkel Cap –The snorkel cap is de-
signed to be fitted into a basement window box.
The SVHRK cap is for use with flex vent pipe.
The vertical distance between the inlet and
outlet of the cap is 28 in. (711 mm).
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 exte-
rior 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.
K. Attach termination adapter - Attach the
adapter (adapter - SV4.5RCH - provided with
the termination) to the vent section or tele-
scoping vent section), elbow or appliance col-
lar as shown in
Figure 32 in the same manner
as any SV4.5 vent component (refer to Step E).
(The Firestop/Spacer may also be installed over
the opening at the interior side of the framing.)
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 33 and Table 4 on page 18.
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.