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14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 18
Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of elbows
required. Refer to
Vertical Vent Figures and
Tables on Page 16 to select the type of vertical
installation desired. Vent sections are available
in net lengths of 4-1/2" (114 mm), 10-1/2" (267
mm), 22-1/2" (572 mm), 34-1/2" (876 mm) and
46-1/2" (1181 mm). Refer to the Vent Section
Length Chart on Page 13 for an aid in select-
ing length combinations. Elbows are available
in 90° and 45° configurations. Refer to Figure
21 on Page 15 for the SV8 E45 and SV8 E90
elbow dimensional specifications.
Where required, a telescopic vent section
(SV8LA) may be used to provide the installer
with an option in installing in tight and con-
fined spaces or where the vent run made up
of fixed length pieces develops a joint in a
undesirable location, or will not build up to the
required length. The SV8LA Telescopic Vent
Section has an effective length of from 1-1/2"
(38 mm) to 6-3/4" (171 mm). The SV8LA is
fitted with a dimpled end (identical to a normal
vent section component) and a plain end with
3 pilot holes. Slip the dimpled end over the
locking channel end of a standard SV8 vent
component the required distance and secure
with three screws.
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical ele-
ments. Clearances for all horizontal elements
are 3" (76 mm) on top, 1" (25 mm) on sides
and 1" (25 mm) on the bottom.
A. Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to locate
center of the vertical run. Cut and/or frame
an opening, 13" x 13" (330 mm x 330 mm)
inside dimensions, about this center mark
(Figure 18).
Figure 19
Align the dimple (four places) of the
upper vent section with the opening
of the locking incline channel on
the lower vent section or appliance
collar. Twist vent component clock-
wise to engage and seal until arrow
and dimple align.
Dimple
Locking Incline
Channel
Connected Vent
Sections
Arrow
Arrow
Appliance Collar or
Vent Section
Figure 20
Blocking
Support Straps
(Plumber's tape)
8 feet (2.4 m)
Maximum
1 inch (25.4
mm) minimum
clearance to
combustibles
Roof
Framing
Ceiling
Framing
Plumb
Bob
13” Min.
(330 mm)
13” Min.
(330 mm)
Push the vent component against the previous
section until it fully engages, then twist the
component clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels.
This seating position
is indicated by the alignment of the arrow and
dimple as shown in Figure 19.
D. Install firestop/spacer at ceiling - When
using Secure Vent, use SV8BF firestop/spacer
at ceiling joists. If there is living space above
the ceiling level, the firestop/spacer must be
installed on the bottom side of the ceiling. If attic
space is above the ceiling, the firestop/spacer
must be installed on the top side of the joist.
Route the vent sections through the framed
opening and secure the firestop/spacer with
8d nails or other appropriate fasteners at each
corner.
Remember to maintain 1" (25 mm)
clearance to combustibles, framing members,
and attic or ceiling insulation when running
vertical chimney sections. Attic insulation
shield (H3908) may be used to obtain the
required clearances indicated here. See
installation accessories on Page 30. The gap
between the vent pipe and a vertical firestop can
be sealed with non-combustible caulking.
E. Support the vertical vent run sections -
Note - Proper venting support is very important.
The weight of the vent must not be supported
by the fireplace in any degree.
Support the vertical portion of the venting
system every 8 feet (2.4 m) above the fireplace
vent outlet.
B. Attach vent components to appliance
- Secure Vent SV8 direct-vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connections (see
Figure 19).
All of the appliances covered in this document
are fitted with collars having locking inclined
channels. The dimpled end of the vent com-
ponents fit over the appliance collar to create
the positive twist lock connection.
To attach a vent component to the appliance
collar, align the dimpled end over the collar,
adjusting the radial alignment until the four
locking dimples are aligned with the inlet of
the four inclined channels on the collar (
refer to
Figure 19). Push the vent component against
the collar until it fully engages, then twist the
component clockwise, running the dimples
down and along the incline channels until they
seat at the end of the channels. The unitized
design of the
Secure Vent™ components will
engage and seal both the inner and outer pipe
without the need for sealant or screws. If desired
a #6 x 1/2" screw may be used at the joint, but
it is not required as the pipe will securely lock
when twisted.
C. Attach vent components to each other
- Other vent sections may be added to the
previously installed section in accordance with
the requirements of the vertical vent figures
and tables. To add another vent component
to a length of vent run, align the dimpled end
over the inclined channel end of the previously
installed section, adjusting the radial alignment
until the four locking dimples are aligned with
the inlets of the four incline channels of the
previous section.