Monessen Hearth BDV300 Installation And Operating Instructions Manual page 19

REAR WALL VENT INSTALLATION (continued)
4. Apply a bead of non-hardening mastic around the outside
edge of vent cap. Position the vent cap in the center of hole
on the exterior wall with the word "UP" on the vent cap
facing up. Insure proper clearance of 1" to combustibles
is maintained. Attach the vent cap with four wood screws
supplied. See Figure 17.
Do not recess vent termination
into any wall. This will cause a
fire hazard.
NOTE: Replace the wood screws with appropriate
fasteners for stucco, brick, concrete, or other types
of siding.
For vinyl siding, stucco, or wood exterior use vinyl siding
standoffs between vent cap and exterior wall. The vinyl siding
standoff prevents excessive heat from melting the vinyl siding
material. Bolt the vent cap to the standoff. Apply non-harden-
ing mastic around outside edge of the standoff instead of the
vent cap assembly. Use wood screws provided to attach the
standoff. See Figure 18.
5. Slide the wall thimble over the vent pipe before connecting
the horizontal run to the vent cap. See Figure 19.
6. Carefully move the fireplace with vent assembly attached
toward the wall and insert the vent pipe into the horizontal
termination. The pipe overlap should be a minimum of
1
1 / ". Apply silicone to the outer pipe connection. Fasten
4
all vent connections with screws provided.
7. Slide the wall thimble against the interior wall surface and
attach with srews. See Figure 19.
54D0108
Apply Mastic to
All Four Sides
Figure 17 - Installing Horizontal Vent Cap
Apply
Mastic to
All Four
Nut
Sides
Figure 18 - Installing Vinyl Siding Standoff
Vent Cap
(Horizontal
Termination)
Figure 19 - Connecting Vent Cap with Horizontal
Vent Pipe
VENT INSTALLATION
Deflecting Shield
Vent Cap
T
H O
Wood
Screw
Cut Vinyl Siding
Away to Fit Standoff
Deflecting Shield
Standoff
Vent Cap
T
H O
Bolt
Wood Screw
Interior Wall
Surface
Decorative
Wall
Thimble
Horizontal
Screw
Vent Pipe
19