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VWDV70 Series Gas Fireplace
INSTALLATION FOR VERTICAL TERMINATION
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
26 to avoid cutting load bearing members.
For optimal fl ame appearance on straight vertical runs of
10 feet (3 m) or higher, the two (2) restrictor sliding plates
on the inside roof of the fi rebox should be partially closed.
Use the following guidelines as a starting point:
Height of Venting
30' to 40' (9.1 to 12.2 m)
20' to 30' (6.1 to 9.1 m)
10' to 20' (3 to 6.1 m)
After initially setting the plate openings, replace glass door
and safety barrier and operate fi replace for at least 15
minutes to observe the fl ames.
For natural gas, the average flame height should be
approximately 6" to 7" (152 to 178 mm).
For LP gas, the average fl ame height should be approxi-
mately 4" to 5" (102 to 127 mm).
If the fl ames are too tall, open plates slightly.
If the fl ames are too short, close plates slightly.
CAUTION: Allow fi replace to cool completely before touch-
ing or opening the glass door.
•
Runs may not incorporate elbows.
NOTE: 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 25 and 26.
2. Set fi replace in desired location. Drop a line plumb down
from the ceiling to the position of the fl ue 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.
FLAT CEILING INSTALLATION
1. Cut a 10
⁄
" (241 mm) square hole in the ceiling using
1
2
the locating hole as a center point The opening should
be framed to 10
⁄
" x 10
1
2
dimensions as shown in Figure 28 using framing lumber
the same size as the ceiling joist. If the area above the
ceiling is an insulated ceiling or a room, nail fi restop from
the top side. This prevents loose insulation from falling
into the required clearance space. Figure 27. Otherwise,
install fi restop below the framed hole. Figure 28
20
Restrictor Plate Setting
1/4 open
1/3 open
1/2 open
⁄
" (241 x 241 mm) inside
1
2
Wall Strap
FP1669
Figure 26 -
Offset with Wall Strap and 45° Elbows
Figure 27 - If Area Above is a Room, Install Firestop above
Framed Hole as Shown
/
1
1 0
Nails
Figure 28 - If Area Above is Not a Room, Install Firestop
above Framed Hole as Shown
VENTING INSTALLATION
Roof Flashing
45° Elbows
Ceiling Firestop
Nails
Firestop
1 0
"
1
2
/
"
2
Firestop
20306745
FP1970
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