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LENNOX HEARTH PRODUCTS • MONTEBELLO
L. Install Firestop/Spacer at exterior wall—
Install SV4.5HF Firestop/Spacer, provided
with the power vent kit, over the opening
at the exterior side of the framing, long
side up, with the 3 in. spacer clearance
at the top as shown in Figure 18, and
nail into place. The Firestop/Spacer may
also be installed over the opening at
the interior side of the framing. The gap
between the vent pipe and a firestop can
be sealed with noncombustible caulking.
(The Firestop/Spacer may also be installed
over the opening at the interior side of the
framing).
M. Install the Power Vent termination—
From outside the exterior wall, slide
the collars of the termination onto the
adaptor 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 termination must not
be recessed into the exterior wall or
siding by more that the 1 1/4 in. (32 mm)
as shown in Figure 19.
The Power Vent termination has been
designed to perform in a wide range of
weather conditions. Terminations meet
or exceed industry standards.
When selecting the location of
termination, do not place the
termination where water from eaves
and adjoining roof lines may create
a heavy flow of cascading water onto
the termination. If the termination
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.
Carefully follow the Installation
Instructions for the termination,
including the use of silicone caulking
where required.
See Table 17 as an aid in venting component
selection for a particular range of exterior
wall thicknesses.
WARNING: 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 in the
same area as a hot termination.
DLX POWER VENT DV GAS FIREPLACES (MDLX40/45IN-PV) • INSTALLATION INSTRUCTIONS
®
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.
(178)
12 1/8 in.
(308 mm)
5 1/8 in.
(130 mm)
Adaptor
SV4.5RCH
6 to 48 in. Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
Figure 18: Installing Power Vent 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 Relative to Exterior
Siding
Surface of Framing
*Caulk
Last Vent Section.
Use Telescopic Vent
Section (SV4.5LA),
*Caulk
Stucco
**For thicknesses greater
than 9 1/4 in., see Table 17
Venting Connection and Exterior Wall Recessing
of the Power Vent Horizontal Termination
Figure 19: Venting Connection and Exterior Wall Recessing of the Power Vent
Horizontal Termination
Vent Components Required
Termination Kit Only
Termination Kit and 6 in. Vent Section (SV4.5L6)
Termination Kit and 12 in. Vent Section (SV4.5L12)
Termination Kit and Telescopic Section (SV4.5L12)
Table 17: Venting Components Required for Various Exterior Wall Thicknesses—
when Using the Power Vent Termination
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
10 1/2 in.
(267 mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Frame Opening.
See Figure 8 on Page 10 for Minimum
Distance to Base of Appliance
Base of Appliance
Interior Surface of
Finished Wall
If Necessary
Power Vent
Termination
Adaptor
SV4.5RCH
Exterior Wall Thickness
6–9 1/4 in.(152–235 mm)
10 3/4–14 in. (273–356 mm)
16 3/4–20 in. (426–508 mm)
11 3/4–20 in. (299–508 mm)
Power Vent
Termination
3 in.
(76 mm)
1 in.
(25.4 mm)
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)**
Power Vent
Termination
1 1/4 in. Maximum Recess of
the Square Termination into
Exterior Finishing Material
17
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