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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
15
Blocking
Support Straps
(Plumber's tape)
8 feet (2.4 m)
Maximum
1 inch (25.4
mm) minimum
clearance to
combustibles
Figure 19
Figure 21
Another method, where the vent is not adjacent
to a wall, is illustrated in Figure 22. Here,
support straps (96K93) and support plates
(96K92) can be used to support the weight
of the vent.
D. Install fi restop / spacer at ceiling - When
using Secure Vent, use SV4.5VF fi restop / spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF fi restop / spacer. If there is living space
above the ceiling level, the fi restop / spacer must
be installed on the bottom side of the ceiling.
If attic space is above the ceiling, the fi restop /
spacer must be installed on the top side of the
joist. Route the vent sections through the framed
opening and secure the fi restop / 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 ver-
tical chimney sections. Attic insulation shield
(96K94) may be used to obtain the required
clearances indicated here. See installation
accessories o n Pages 31 and 32.
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 fi replace in any degree.
Support the vertical portion of the venting
system every 8 feet (2.4 m) above the fi replace
vent outlet. One method of support is by utiliz-
ing fi eld 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 21.
10-1/2" Min.
(267 mm)
10-1/2" Min.
(267 mm)
Figure 20
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 col-
lar. Twist vent component clockwise
to engage and seal until arrow and
dimple align.
Dimple
Locking Incline
Channel
Connected Vent
Sections
Arrow
Arrow
Appliance Collar or
Vent Section
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
Pages 17 and 18 to select the type of vertical
installation desired. Refer to the Vent Section
Length Charts on Page 14 for an aid in se-
lecting vent length combinations. Elbows are
available in 45° and 90° confi gurations. Refer
to Figure 23 for the SV4.5E45 and SV4.5E90
elbow dimensional specifi cations.
Where required, a Telescopic Vent Section
(SV4.5LA) may be used to provide the installer
with an option in installing in tight and confi ned
spaces or where the vent run made up of fi xed
length pieces develops a joint in a undesirable
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 fi tted
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 secure
with three screws.
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical
elements. Clearances for all horizontal ele-
ments 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, 10-1/2" x 10-1/2" (267 mm x 267
mm) inside dimensions, about this center mark
(Figure 19).
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 20). 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 not required as the pipe will securely
lock when twisted.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.
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. 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 20.
B. Attach vent components to appliance
- Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connections (see
Figure 20). All of the appliances covered in this
document are fi tted with collars having locking
inclined channels. The dimpled end of the vent
components fi t over the appliance collar to cre-
ate the positive twist lock connection.