18
20306748
MLDV Series Gas Fireplace
VENTING INSTALLATION
Example:
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 24 -
Maximum Elbow Usage
1 + 2 + 3 + 4 = 270°
1
2
3
4
1
2
3
4
•
For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18"
(457 mm). This does not apply if the 45° elbows are
installed on the vertical part of the vent system.
•
The maximum number of elbow degrees in a system is
270°.
Figure 24
VERTICAL SIDE WALL APPLICATIONS
For 5 x 8 Venting
1. Locate and cut the vent opening in the wall. For
combustible walls
fi
rst frame in opening.
Combustible Interior Walls:
Cut a 12
1
⁄
2
"H x 10
1
⁄
2
" W
hole through the interior wall.
Combustible Exterior Walls:
Cut a 10
1
⁄
2
"H x 10
1
⁄
2
"W
square hole through the exterior wall frame.
Figure 25
Noncombustible
Walls:
Hole opening should be 8
1
⁄
2
"
(216 mm) in diameter.
2. The center of the hole should line up with the center line
of the horizontal rigid vent pipe end. Allow 1/4" minimum
rise per foot.
Figure 25
NOTE: #1222DA reducer must be used when 4x6
5
⁄
8
"
venting is preferred. The 7TDVP58 reducer must be
used when 4" x 7" venting is preferred. Reducer must
be installed directly onto unit at the
fi
replace collar
before vertical rise.
W
ARNING
You may use a reducer from 5" x 8" to 4" x
6
5
⁄
8
" or 4" x 7" for horizontal with vertical rise
applications. ONLY use framing instructions
below when using 4" x 6
5
⁄
8
" or 4" x 7" venting.
If the reducer is installed at the rear of the
unit, you must immediately follow with a 90
elbow for a vertical rise before continuing
with any horizontal run. There is a minimum
total height of 7 feet from the
fi
replace
fl
oor
to the last section of pipe before horizontal
run. Refer to graph on Page 17.
10
1
/
2
"
(267 mm
)
10
1
/
2
"
(267 mm
)
8
1
/
2
"
(216 mm
)
Figure 25 -
Exterior Wall Framing Dimensions for 5" x 8"
Combustible
Wall
Noncombustible
Wall
FP1954
For 4 x 7 (or 4 x 6
5
⁄
8
) Venting
1. Locate and cut the vent opening in the wall. For com-
bustible walls
fi
rst frame in opening.
Combustible Interior Walls:
Cut a 11
1
⁄
2
"H x 9
1
⁄
2
" W hole
through the interior wall.
Combustible Exterior Walls:
Cut a 9
1
⁄
2
"H x 9
1
⁄
2
"W
square hole through the exterior wall frame.
Figure 26
Noncombustible
Walls:
Hole opening should be 7
1
⁄
2
"
(190 mm) in diameter.
2. The center of the hole should line up with the center line
of the horizontal rigid vent pipe end. Allow 1/4" minimum
rise per foot.
Figure 26
