Monessen Hearth HBDV400N/PSC7 - Manual (Page 19)

HBDV7 Series Direct Vent Gas Fireplace
54D8000 19
VeRtICAl SIDeWAll INStAllAtIoN -
tWISt 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 28 (For com-
bustible walls first frame in opening.)
Note: When using flex vent, the opening will have to be
measured according to the 1/” (13 mm) rise in 1” (305
mm) vent run.
Combustible Walls: Cut a 9B\,”H x 9B\,”W (44 x 44 mm)
hole through the exterior wall and frame as shown. Figure
28
Noncombustible Walls: Hole opening must be 7Z\x” (191
mm) in diameter.
VeNtING INStAllAtIoN
VO584-100
Vent Opening
2/99 djt
Vent opening for Combustible Walls
9B\,”
(44 mm)
Min.
Fireplace Hearth
Framing Detail
opening for Noncombustible Wall
7Z\x”
(190 mm)
Fireplace Hearth
FP93
Figure 28 -
Locate vent opening on wall.
9B\,”
(44 mm) Min.
Step 2
Secure firestop to the inside frame, center in the 9B\," x
9B\," vent opening.
Step 3
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 29
Step 4
Using appropriate length of pipe section(s) attach to fire-
place with three (3) screws. Follow with the installation of
the inner and outer elbow, again secure joints with three
(3) sheet metal screws.
X X
Figure 29 -
Vertical Height Requirements
FP1181
Step 5
Measure the horizontal length requirement including a ”
(51 mm) overlap, i.e. from the elbow to the outside wall
face plus ” (51 mm) (or the distance required if installing
a second 90° elbow). Figure 30
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.
X
X
Figure 30 -
Horizontal Length Requirements
FP118