Monessen Hearth BDV300N/PV7 Installation And Operation Instructions Manual page 19

VeNtING INStAllAtIoN
VeRtICAl SIDeWAll INStAllAtIoN -
t-loCK PIPe
Step 1
Locate vent opening on the wall. It may be necessary to
first position the fireplace and measure to obtain hole lo-
cation. Depending on whether the wall is combustible or
noncombustible, cut opening to size. Figure 27 (For com-
bustible walls first frame in opening.)
Note: When using flex vent, the opening will have to be
measured according to the 1/2" (13 mm) rise in 12" (305
mm) vent run.
Combustible Walls: Cut a 9B\,"H x 9B\,"W (244 x 244 mm)
hole through the exterior wall and frame as shown. Figure
27
Noncombustible Walls: Hole opening must be 7Z\x" (191
mm) in diameter.
Vent opening for Combustible Walls
9B\,"
(244 mm) Min.
9B\,"
(244 mm)
Min.
Fireplace Hearth
opening for Noncombustible Wall
7Z\x"
(190 mm)
Fireplace Hearth
Figure 27 -
Locate vent opening on wall.
Step 2
Secure firestop to the inside frame, center in the 9B\," x
VO584-100
9B\," vent opening.
Vent Opening
Step 3
2/99 djt
Place fireplace into position. Measure the vertical height
(X) required from the base of the flue collars to the center
of the wall opening. Figure 28
Step 4
Using appropriate length of pipe section(s) attach to fire-
place. Follow with the installation of the inner and outer
elbow.
20301836
Framing Detail
FP2293
BDV7 Series Direct Vent Gas Fireplace
X
Figure 28 -
Vertical Height Requirements
Step 5
Measure the horizontal length requirement including a 2"
(51 mm) overlap, i.e. from the elbow to the outside wall
face plus 2" (51 mm) (or the distance required if installing
a second 90° elbow). Figure 29
Always install horizontal venting on a level
plane.
Step 6
Use appropriate length of pipe sections - telescopic or
fixed - and install. The sections which go through the wall
are packaged with the starter kit, and can be cut to suit if
necessary.
Sealing vent pipe and firestop gaps with high tem-
perature sealant will restrict cold air being drawn in
around fireplace.
Figure 29 -
Horizontal Length Requirements
X
FP1181
X
X
FP1182
19