Design Dynamics DVF-36S-N Installation Planning, Twist-Lock Procedure The female

Venting Installation

Continued

INSTALLATION PLANNING

There are two basic types of direct vent installation:

•Horizontal Termination

•Vertical Termination

Outside air flex installation is required for both horizontal and vertical installation (see page 13).

Horizontal Termination Installation IMPORTANT: Horizontal square terminations require only inner portion of wall firestop. Hori- zontal installations using round termination require exterior portion of wall firestop.

1. Set the fireplace in its desired location and

determine the route your horizontal vent-

ing will take. Do not secure the fireplace

until all venting has been installed. Some

installations require sliding the fireplace

in and out of position to make final vent-

ing connections. Figures 14 and 15 on

4.Carefully determine the location where the vent pipe assembly will penetrate the outside wall. The center of the hole should line up with the center-line of the horizontal vent pipe. Mark the wall for an 11 1/2" x 11 1/2" square hole. Cut and frame the square hole in the exterior wall where the vent will be terminated. If the wall being penetrated is constructed of noncombustible material, such as masonry block or concrete, a 8 1/2" hole with zero clearance is acceptable (see Figure 9).

Female

Locking Lugs

Male

Slots

Figure 8 - Vent Pipe Connections

page 11 show different configurations for

venting with horizontal termination that

will help you decide which application

best suits your installation. Check to see

if wall studs or roof rafters are in the path

of your desired venting route. If they are,

you may want to adjust the location of the

fireplace.

Vent Opening

Combustible Wall

111/2"

111/2"

111/2" Inside Framing

2. Direct vent pipe sections and compo-

(Framing

nents are designed with special twist-lock

Vent Opening

Detail)

connections.

Twist-Lock Procedure: The female

ends of the pipes have locking lugs (in-

dentations). These lugs will slide straight

into matching slots on the male ends

of adjacent pipes. Push pipe sections

together and twist one section clockwise

approximately one-quarter turn until the

sections are fully locked (see Figure 8).

Note: Horizontal runs of vent must be sup-

ported every three feet. Use wall straps

for this purpose.

3. Assemble the desired combination of pipe

and elbows to the fireplace flue collar. If

there are long portions of venting run, pre-

assembled pipe sections may be installed

as subassemblies for convenience.

Noncombustible Wall

8 1/2"

Center of

Hole

Figure 9 - Vent Opening Requirements

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