Monessen Hearth Direct Vent Gas Fireplace MDV500 - Manual (Page 19)

75D2523 19
HOT
HOT
VENT INSTALLATION
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 18.
WARNING
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 for Simpson or
Selkirk Terminations only. The vinyl siding standoff prevents
excessive heat from melting the vinyl siding material. N
OTE
:
Monessen Termination does not require standoff. Bolt the
vent cap to the standoff or wall. Apply non-hardening mastic
around outside edge of the standoff instead of the vent cap
assembly. Use wood screws provided to attach the standoff.
See Figure 19.
5. Slide the wall thimble over the vent pipe before connecting
the horizontal run to the vent cap. See Figure 20.
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 /
4
". Apply silicone to the outer pipe connection. Fasten
all vent connections with screws provided.
7. Slide the wall thimble against the interior wall surface and
attach with screws. See Figure 20 .
NOTICE
For more information, follow
instructions that comes with
terminations.
Figure 18 - Installing Horizontal Vent Cap
REAR WALL VENT INSTALLATION (continued)
Figure 19 - Installing Vinyl Siding Standoff
and Termination
Vent Cap
Wood
Screw
Apply Mastic to
All Four Sides
Figure 20 - Connecting Vent Cap with Horizontal Vent Pipe
Interior Wall
Surface
Fire Stop
Assembly
Horizontal
Vent Pipe
Screw
Vent Cap
(Horizontal
Termination)
Apply
Mastic to
All Four
Sides
Cut Vinyl Siding Away to Fit
Standoff or Termination
Wood Screw
Termination
Bolt
Nut
Standoff #1250 or
5DT-VS
(Not Required
for Monessen
Termination)