16
20306748
MLDV Series Gas Fireplace
VENTING INSTALLATION
Figure 18 -
Install Duravent/Selkirk Vinyl Siding Standoff and
Termination
HOT
Cut Vinyl Siding Away
to Fit Standoff
Standoff #1250 or
5DT-VS
(Not required for Ver-
mont Castings Group
termination)
Termination
Bolt
Wood Screw
Nut
Apply
Mastic to
all Four
Sides
FP1956
Figure 19 -
Install Firestop on Horizontal Vent Pipe
Interior Wall
Surface
Firestop
Horizontal
Vent Pipe
Screw
Vent Cap
(Horizontal
Termination)
FP1957
HO
T
Vent Cap
Wood Screw
Apply Mastic to all
Four Sides
Figure 17 -
Install Horizontal Termination
For more information, follow instructions
provided with terminations.
NOTICE
Do not recess vent termination into any
wall. This will cause a
fi
re hazard.
W
ARNING
All rear vent through-the-wall applications
must use Vermont Castings Group-de-
signed 5 x 8 square termination.
No other
manufacturer's termination is permitted in
this application.
NOTICE
6. Slide the stop over the vent pipe before connecting the
horizontal run to the vent cap.
Figure 19
7. 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.
8. Slide the wall thimble against the interior wall surface
and attach with screws.
Figure 19
HORIZONTAL WITH VERTICAL RISE
(THROUGH-THE-WALL)
TERMINATION CONFIGURATIONS
Since it is very important that the venting system
maintain its balance between the combustion air
intake and the
fl
ue gas exhaust, certain limitations
as to vent con
fi
gurations apply and must be strictly
adhered to.
The Vent Graph, showing the relationship between vertical
and horizontal side wall venting, will help to determine the
various dimensions allowable.
Figure 13
Minimum clearance between vent pipes and combustible
materials is 3" on top and 1" from bottom and sides unless
otherwise noted (Exception: Outside wall with
fi
restop: 1"
all around pipes are allowed). If the vertical run is 7
1
/
2
feet
or more, off the top of the
fi
replace, the clearance is 1" on
all sides of the horizontal run.
When vent termination exits through foundations less than
20" below siding outcrop, the vent pipe must be
fl
ush with
the siding.
It is best to locate the
fi
replace in such a way that minimizes
the number of offsets and horizontal vent length.