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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical
Rise
SV4.5E90
Elbow
Horizontal / Inclined Run
SV4.5 HT
Termination
*Firestop/Spacer
SV4.5VF
SV4.5L6/12/24/36/48
Vent Sections
Support Bracket Spacing
Every 5 ft (1.52 m)
See Figure 25 on page 12
or Figure 26 on page 13
for vertical vent section
support.
Support
Brackets
Building
Support
Framing
Ceiling
Fireplace
Exterior
Wall
TYPICAL HORIZONTAL VENT INSTALLATION
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
SV4.5 HTS
Termination
Figure 37
Push the vent component against the collar
until it fully engages, then twist the compo-
nent 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. Sealant and securing
screws are not required.
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 24
on page 12.
F. Install firestop/spacer at ceiling -
When using Secure Vent, use SV4.5VF fir-
estop/spacer at ceiling joists; when using Se-
cure Flex, use SF4.5VF 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 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 at-
tic or ceiling insulation when running verti-
cal chimney sections. Attic insulation shield
(96K94) may be used to obtain the required
clearances indicated here. See installation
accessories table on page 27.
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe compo-
nents featuring positive twist lock connection,
(
refer to Figure 23
on page 12). 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 27 on
page 13
.
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
Figures
9 (CDST), 10 (CDPF), 11 (CDCL), or 12 (CDCR)
on
page 7. Cut and/or frame an opening, 10¹⁄₂" x 12¹⁄₈"
(267 mm x 308mm) inside dimensions, about this
center.
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 22
on page 12 ).
G. Support the vertical run sections -
See section E on page 12.
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 sections.See
Figure 27 on page 12
.
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 23
on page 12).
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 37.
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.
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
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.
Figure 37, and Figures 40 to 46 on page 18 to
20
and their associated Horizontal Vent Table
illustrate the horizontal venting configurations
that are allowed to be used with these appliances.
Secure Vent pipe applications are shown in these
figures; Secure Flex pipe may also be used.
See
page 21.
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.