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14
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical
Rise
SV4.5E90
Elbow
Horizontal / Inclined Run
SV4.5HTSSL
Termination
Shown
*Ceiling
Firestop/Spacer
(SV4.5BF)
SV4.5L6/12/24/36/48
Vent Sections
Support Bracket Spacing
Every 5 ft (1.52 m)
See Figure 17 on page 10
for vertical vent section
support.
Support
Brackets
Building
Support
Framing
Ceiling
Fireplace
Exterior
Wall
Exterior
Wall
TYPICAL HORIZONTAL VENT INSTALLATION
Firestop/Spacer
SV4.5HTSSL
Termination
Shown
Fireplace
*When using Secure Flex
use Firestop/Spacer
(SF4.5BF)
Figure 28
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connection, (
refer to
Figure 15
on page 10). All of the appliances
covered in this document are fitted with collars
having locking inclined channels. The dimpled
end of the vent components fit over the appliance
collar to create the positive twist lock connection.
A. Plan the vent run -
Analyze the vent routing and determine the
types and quantities of sections required
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)
net section lengths are available. Make allow-
ances for elbows as indicated in
Figure 18 on
page 10
. Maintain a minimum 1" (25 mm)
clearance to combustibles on the vertical
sections. Clearances for the horizontal runs
are; 3" (76 mm) on top, 1" (25 mm) on sides,
and 1" (25 mm) at the bottom.
B. Frame exterior wall opening -
Locate the center of the vent outlet on the exterior wall
according to the dimensions shown in
Figure 9
on
page 7. Cut and/or frame an opening, 10¹⁄₂" x 12¹⁄₈"
(267 mm x 308mm) inside dimensions, about this
center.
H. Change vent direction - At transition from
or to a horizontal/inclined run, install the
SV4.5E45 and SV4.5E90 elbows in the same
manner as the straight vent sections. The
elbows feature a twist section to allow them
to be routed about the center axis of their
initial collar section to align with the required
direction of the next vent run element. Twist
elbow sections in a clockwise direction only
so as to avoid the possiblity of unlocking
any of the previously connected vent sec-
tions. See
Figure 18 on page 11
.
F. Install firestop/spacer at ceiling -
When using Secure Vent, use SV4.5BF fir-
estop/spacer at ceiling joists; when using Se-
cure Flex, use SF4.5BF firestop/spacer. If there
is living space above the ceiling level, the fir-
estop/ 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 se-
cure the firestop/spacer with 8d nails or other
appropriate fasteners at each corner.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner as
you would a vent section.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.
E. Attach vent components to each other -
Other vent sections may be added to the previ-
ously installed section in accordance with the
requirements of the vent tables. To add another
vent component to a length of vent run, align the
dimpled end of the component 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 16 on page 10.
D. Attach vent components to appliance - 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 inlets of the four incline
channels on the collar (
refer to Figure 15
on
page 10). Push the vent component against the
collar until it fully engages, then twist the com-
ponent 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 elements with
the same procedure.
I. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined
run as described in Step E. Install support
straps every 5 ft. (1.52 m) along horizontal/
inclined vent runs using conventional plumber’s
tape. See
Figure 28.
It is very important that
the horizontal/inclined run be maintained in a
straight (no dips) and recommended to be in
a slightly elevated plane, in a direction away
from the fireplace of
¹⁄₄" rise per foot (20 mm
per meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all the
way down to at or near level. Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.
Figures 28, and Figures 34 to 41 on pages 16 to
18
and their associated Horizontal Vent Table
illustrate the various horizontal venting configura-
tions that are possible for use with these appli-
ances. Secure Vent pipe applications are shown in
these figures; Secure Flex pipe may also be used.
A Horizontal Vent Table summarizes each system’s
minimum and maximum vertical and horizontal
length values that can be used to design and install
the vent components in a variety of applications.
Both of these horizontal vent systems terminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 8
on page 6 for location guidelines.
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
G. Support the vertical run sections -
On the vertical run, support the venting system
every 8 feet (2.4m) above the fireplace vent
outlet with field provided support straps
(Plumber's tape).
Attach the straps to the vent
pipe and secure to the framing members with
nails or screws.
See
Figure 17 on page 10.
C. Frame ceiling opening - If the vertical
route is to penetrate a ceiling, use plumb line
to locate the center above the appliance. Cut
and/or frame an opening, 10¹⁄₂" x 10¹⁄₂" (267
mm x 267 mm) inside dimensions, about this
center (refer to
Figure 14
on page 10 ).
J. Assemble vent run to exterior wall - If not
previously measured, locate the center of the
vent at the exterior wall. Prepare an opening as
described in Step B
When using square (SV4.5 HTS), short square
(SV4.5 HTSS) or round (SV4.5HTR) horizon-
tal termination -
Assemble the vent system to point where the
terminus of the last section is within 6 in. (152
mm) to 10¹⁄₄ in. (260 mm) inboard of the
exterior surface to which the termination is to
be attached, see
Figure 31 on page 15
.
Sealant and securing screws are not required.
It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.