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78D0011
17
WDV Series Gas Fireplace
1. Determine the route your vertical venting will take. If
ceiling joist, roof rafters or other framing will obstruct
the venting system, consider an offset. Refer to Figure
20 to avoid cutting load bearing members.
For optimal flame appearance, a restrictor disk is necessary
on straight vertical runs of 10' of more.
• Runs may not incorporate elbows.
• The disk is part number 56D3027 and is included in
installation manual packet.
• Drop the disk into a 5" inner collar before installing the
first section of flue or install at the last section before
installing the termination.
• An additional disk may be installed on runs of 35' or more.
Rotate disks perpendicular to each other.
Pay special attention to these installation instructions
for required clearances (air space) to combustibles when
passing through ceilings, walls, roofs, enclosures, attic
rafters, etc. Do not pack air spaces with insulation. Also
note maximum vertical rise of the venting system and any
maximum horizontal offset limitations. Offsets must fall
within the parameters shown in Figures 19 and 20.
2. Set fireplace in desired location. Drop a line plumb down
from the ceiling to the position of the flue exit. Mark the
center point where the vent will penetrate the ceiling.
Drill a small locating hole a this point.
Drop a plumb line from the inside of the roof to the ceiling
locating hole in the ceiling. Mark the center point where
the vent will penetrate the roof. Drill a small locating hole
at this point.
1. Cut a 10Z\x" (241 mm) square hole in the ceiling using
the locating hole as a center point The opening should
be framed to 10Z\x" x 10Z\x" (241 x 241 mm) inside dimen-
sions as shown in Figure 22 using framing lumber the
same size as the ceiling joist. If the area above the ceil-
ing is an insulated ceiling or a room, nail firestop from
the top side. This prevents loose insulation from falling
into the required clearance space. Figure 21. Otherwise,
install firestop below the framed hole. Figure 22
2. Assemble the desired lengths of pipe and elbows nec-
essary to reach from the burner system flue up through
the firestop. Be sure pipe and elbow connections are
fully twist-locked.
FP1969
offset w/ wallstrap
Figure 20 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firstop
FP1669
FP1969
firestop w room above
10
1
/
2
"
10
1
/
2
"
FP1970
firestop no room
Figure 21 - If Area Above is a Room, Install Firestop
above Framed Hole as Shown
Figure 22 - If Area Above is Not a Room, Install
Firestop above Framed Hole as Shown
Firestop
Nails
Nails
Firestop
FP1970