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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
10¹⁄₂” Min.
(267 mm)
10¹⁄₂” Min. (267 mm)
First Vent
Component
Align the dimple (four places)
with the opening of the locking
incline channel on appliance
collar. Twist vent component
clockwise to engage and seal.
Locking
Incline Channel
Dimple
Appliance collar
Vent / Appliance Collar
Connection
Align the dimple (four places) of the
upper vent section with the opening of
the locking incline channel on the
lower vent section. Twist vent
component clockwise to engage and
seal until arrow and dimple align.
Locking
Incline Channel
Dimple
Arrow
Connected
Vent Sections
Vent / Vent Section
Connection
Arrow
Arrow
1 inch (25.4 mm)
minimum
clearance to
combustibles
8 feet (2.4 m)
Maximum
Blocking
Support
Straps
(Plumber’s
tape)
Figure 22
Figure 23
Figure 25
Figure 24
This seating position is indicated by the align-
ment of the arrow and dimple as shown in
Figure 24.
D. Install firestop/spacer at ceiling - When
using Secure Vent, use SV4.5VF firestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF firestop/spacer. 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 mem-
bers, and attic or ceiling insulation when
running vertical chimney sections. Attic insu-
lation shield (96K94) may be used to obtain
the required clearances indicated here. See
installation accessories table on page 26.
Vertical (Offset) Installation
Analyze the vent routing and determine the
number of vent sections and elbows required.
Refer to Vertical Vent Figures and Tables on
page 14 and 15 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 11 for an aid in selecting
length combinations. Elbows are available in
45° and 90° configurations. Refer to
Figure 27
for the SV4.5E45 and SV4.5E90 elbow dimen-
sional specifications.
Where required, a telescopic vent section
(SV4.5LA) 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 unde-
sirable location, or will not build up to the
required length. The SV4.5LA Telescopic Vent
Section has an effective length of from 1 ¹⁄₂" (38
mm) to 7 ¹⁄₂" (191 mm). The SV4.5LA is fitted
with a locking inclined channel end (identical to
a normal vent section component) and a plain
end with 3 pilot holes. Slip the plain end over
the locking channel end of a standard SV4.5
vent component the required distance and se-
cure with three screws.
Maintain a minimum 1" (25 mm) clearance to
combustible materials for all vertical elements.
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, 10¹⁄₂" x 10¹⁄₂" (267mm x
267mm) inside dimensions, about this cen-
ter mark
(Figure 22)
.
To attach a vent component to the appliance
collar, align the dimpled end over the collar,
adjusting the radial alignment until the four lock-
ing dimples are aligned with the inlet of the four
inclined channels on the collar (
refer to Figure
23)
. 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 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 require-
ments 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.
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.
E. Support the vertical vent run sections -
Note - Proper venting support is very impor-
tant. The weight of the vent must not be sup-
ported by the firplace in any degree.
Support the vertical portion of the venting sys-
tem every 8 feet (2.4m) above the fireplace vent
outlet. One method of support is by utilizing
field provided support straps (conventional
plumber's tape). Secure the plumber's tape to
the framing members with nails or screws.
Loop the tape around the vent, securing the
ends of the tape to the framing. If desired,
sheet metal screws #6 x ¹⁄₂" length may be
used to secure the support straps to the vent
pipe. See
Figure 25.
Another method, where the vent is not adjacent
to a wall, is illustrated in
Figure 26
. Here, support
straps (96K93) and support plates (96K92) can
be used to support the weight of the vent.
B. Attach vent components to appliance - Se-
cure Vent SV4.5 direct vent system components
are unitized concentric pipe components featur-
ing positive twist lock connections (
see Figure
23
). All of the appliances covered in this docu-
ment are fitted with collars having locking in-
clined channels.
The dimpled end of the vent components fit over
the appliance collar to create the positive twist
lock connection.