10 1/2” Min.
(267 mm)
10 1/2” Min.
(267 mm)
Figure 14
D. Attach vent components to 45 degree starter elbow - Secure Vent SV4.5 direct vent system components are unitized concentric pipe components featuring positive twist lock connections (see Figure 15 ).
All of the appliances covered in this document are fitted with collars having locking inclined channels. The dimpled end of the vent compo- nents fit over the appliance collar to create the positive twist lock connection.
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.
Dimple
Locking
Incline Channel
45 degree starter elbow
Vent / 45 Degree Starter
Elbow Connection
Figure 15
To attach a vent component to the 45 degree starter elbow, align the dimpled end over the elbow, 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 15 ).
Push the vent component against the starter elbow 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 com- ponents 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.
Note: Always use the starter elbow directly at the appliance 45° collar unless rigid straight pipe of flex pipe is used, as shown in Figure 17.
E. 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.
This seating position is indicated by the alignment of the arrow and dimple as shown in Figure 16.
F. 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 25.
G. Support the vertical vent run sections - Note - Proper venting support is very impor- tant. 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 (2.4m) above the fireplace vent outlet. One method of support is by utiliz- ing field provided support straps (conven- tional plumber's tape). Secure the plumber's tape to the framing members with nails or screws.
Arrow | 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. | |
| Dimple |
|
| Locking |
|
| Incline Channel |
|
| Connected |
|
| Vent Sections | Arrow |
Arrow | Vent / Vent Section |
|
| Connection |
|
Figure 16
Rigid Or Flex
Venting
Components May
Be Connected
Directly To The 45
Degree Collar.
Detail
Figure 17
Blocking
Support Straps (Plumber’s tape)
8 feet (2.4 m)
Maximum
1 inch
(25.4 mm) minimum clearance to combustibles
12
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.