Lennox Merit MLDVT-35NM-FB Installation Instructions Manual page 19

LENNOX HEARTH PRODUCTS • MERIT
11. Attach termination adaptor—Attach
the adaptor (SV4.5RCH, provided with
the termination) to the vent section
or telescoping vent section), elbow or
appliance collar as shown in Figure 23
in the same manner as any SV4.5 vent
component (Step 5).
12. 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 in. spacer clearance
at the top (Figure 22), and nail into
place. The firestop/spacer may also be
installed over the opening at the interior
side of the framing.
13. Install the desired termination
a. SV4.5HT-2 or SV4.5HTSS Square
termination—For the last step,
from outside the exterior wall,
slide the collars of the termination
onto the adaptor (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 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 in.
(32 mm) as shown in Figure 23.
b. SVHRK Snorkel Cap—The snorkel
cap is designed to be fitted into a
basement window box. The SVHRK
cap is for use with flex vent. The
vertical distance between the inlet
and outlet of the cap is 28 in.
(711 mm).
NOTE: 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, use
a termination guard (Page 33). This
can be purchased at your local dealer.
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.
SERIES DIRECT-VENT GAS FIREPLACES • MLDVT-30/35/40/45 • INSTALLATION INSTRUCTIONS
®
Figure 21: Typical Horizontal Vent Installation
Support
Building
Brackets
Support
Framing
SV4.5E90
Elbow
Ceiling
)
®
Vertical
Rise
Figure 22: Installing the Square Horizontal Termination
(178)
12 1/8 in.
(308 mm)
5 1/8 in.
(130 mm)
Adapter
SV4.5RCH
6 to 48 in. Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
Figure 23: 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
m a s o n r y w a l l s u r f a c e .
Siding
*Caulk
*Caulk
Square Termination
Stucco
Venting Connection and Exterior Wall Recessing of the
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
TYPICAL HORIZONTAL VENT INSTALLATION
Horizontal / Inclined Run
SV4.5L6/12/24/36/48
Firestop/Spacer
Support bracket spacing
every 5 ft (1.52 m)
Vertical Vent
Fireplace
To help minimize water
infiltration it is recommended that
the Firestop/Spacer (SV4.5HF)
be installed on the exterior
side of the wall.
7 in.
10-1/2 in.
(267mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Framed Opening.
Base of Appliance
Interior Surface of
Finished Wall
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
SV4.5HT-2
Adapter
SV4.5RCH
** For thicknesses greater
than 9 1/4 in., see Venting
Components Required for
Various Exterior Wall Thicknesses,
when using Typical Termination Kits
Horizontal Square Termination (SV4.5HT-2).
SV4.5HT-2
Termination
Exterior
Wall
Vent Sections
SV4.5HT-2
Termination
Exterior
Wall
SV4.5HT-2
Termination
3 in.
(76 mm)
1 in.
(25.4 mm)
Min. Distance to Base
of Appliance.
Maximum wall thickness
9 1/4 in. (235 mm)**
Exterior Surface of Siding
Exterior Surface of
Framing
6 in. to 9 1/4 in.
(152 to 235 mm)**
SV4.5HT-2
Square Termination
1 1/4 in. Maximum recess of
the Square Termination into
Exterior Finishing Material
19