Mldv series gas fireplace, Venting installation, Warning – Monessen Hearth DIRECT VENT MLDV500 User Manual
Page 20
0
75D0004
MLDV Series Gas Fireplace
VENTING INSTALLATION
1. Locate and cut the vent opening in the wall. For
combustible walls first frame in opening.
Combustible Interior Walls: Cut a 1
Z\x
"H x
10
Z\x
" W hole through the interior wall.
Combustible Exterior Walls: Cut a 10
Z\x
"H
x 10
Z\x
"W square hole through the exterior
wall frame. Figure 25
Noncombustible Walls: Hole opening should
be 8
Z\x
" (16 mm) in diameter.
. 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
1. Locate and cut the vent opening in the wall. For com-
bustible walls first frame in opening.
Combustible Interior Walls: Cut a 11Z\x"H x 9Z\x" W hole
through the interior wall.
Combustible Exterior Walls: Cut a 9Z\x"H x 9Z\x"W
square hole through the exterior wall frame. Figure 26
Noncombustible Walls: Hole opening should be 7Z\x"
(190 mm) in diameter.
. 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
HORIZONTAL WITH VERTICAL RISE (THROUGH-THE-WALL) APPLICATIONS
NOTE: #1222DA reducer must be used when 4x6B\,"
venting is preferred. Reducer must be installed directly
onto unit at pipe adaptor before vertical rise.
W
ARNING
You may use a reducer from 5" x 8" to 4" x 6B\,"
for horizontal with vertical rise applications.
ONLY use framing instructions below when
using 4" x 6B\," 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 fireplace floor
to the last section of pipe. Refer to graph on
Page 17.
FP1954
wall framing
10
1
/
"
(67 mm
)
10
1
/
"
(67 mm
)
8
1
/
"
(16 mm
)
Figure 25 -
Exterior Wall Framing Dimensions for 5" x 8"
Combustible
Wall
Noncombustible
Wall
FP1954
FP1954
wall framing
9
1
/
"
(41 mm
)
9
1
/
"
(41 mm
)
7
1
/
"
(190 mm
)
Combustible
Wall
Noncombustible
Wall
FP1954
Figure 26 -
Exterior Wall Framing Dimensions for 4" x 6
5
/
8
"