TOA Electronics SSDV-3328 User Manual

Page 16

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

If the vent system extends more than 5 feet (1.5

m) above the roof flashing, stabilizers may be

necessary. Additional screws may be used at

section joints for added stability. Guide wires

may be attached to the joint for additional sup-

port on multiple joint configurations.

G. Continue installation of horizontal/inclined

sections - Continue with the installation of the

straight vent sections in horizontal/inclined run

as described in Step C. Install support straps

every 5 ft. (1.52 m) along horizontal/inclined

vent runs using conventional plumber’s tape.

See Page 19, Figure 31. 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.

H. Frame roof opening - Identify location for

vent at the roof. Cut and/or frame opening per

Roof Framing Chart and Figure 23.

One method of support is by utilizing field pro-

vided 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. Refer to Figure 21.

F. Change vent direction to horizontal/inclined

run - At transition from or to a horizontal/in-

clined 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 22.

K. Install the vertical termination - The final

step involves installation of the SV4.5CGV-1

Vertical Termination. Extend the vent sections

to the height as shown in the "Vertical vent ter-

mination section" on Page 7. The SV4.5CGV-1

Vertical Termination (Figure 25) can be installed

in the exact same fashion as any other Secure

Vent section. Align the termination over the

end of the previously installed section, adjust-

ing the radial alignment until the four locking

dimples of the termination are aligned with

the inlets of the four incline channels of the

last vent section. Push the termination down

until it fully engages, then twist the termination

clockwise running the dimples down and along

the incline channels until they are seated at the

end of the channels.

I. Install the roof flashing - Extend the vent

sections through the roof structure. Install the

roof flashing over the vent section and posi-

tion such that the vent column rises vertically

(use carpenters level) (Figure 24 ). Nail along

perimeter to secure flashing or adjust roofing

to overlap the flashing edges at top and sides

only and trim where necessary. Seal the top

and both sides of the flashing with waterproof

caulking.

J. Install the storm collar - Install the storm

collar, supplied with the flashing, over the

vent/flashing joint. See Figure 24. Loosen the

storm collar screw. Slide collar down until it

meets the top of the flashing. Tighten the ad-

justing screw. Apply non-combustible caulking

or mastic around the circumference of the joint

to provide a water tight seal.

Figure 22

7-5/8”

(194 mm)

4-13/16

(122 mm)

Swivel Joint

(360° swivel)

SV4.5E45

45° Elbow)

Swivel Joint

(360° swivel)

SV4.5E90

90° Elbow)

(206 mm)

8-1/8"

Figure 24

Storm

Collar

Figure 25

Framing Dimensions for Roof

Inches (millimeters)

Pitch

0/12

10-1/2 in.

(267 mm)

10-1/2 in.

(267 mm)

6/12

10-1/2 in.

(267 mm)

12 in.

(305 mm)

12/12

10-1/2 in.

(267 mm)

17 3/4 in.

(451 mm)

Figure 23

- Roof Framing