20306748
15
MLDV Series Gas Fireplace
•
Only one 45 degree elbow is allowed in these installa-
tions.
1. Rigid vent pipes and
fi
ttings have special twist-lock
connections. Assemble the desired combination of pipe
and elbows to the appliance adapter.
Twist-Lock
Procedure:
The female ends of the pipes
and
fi
ttings have three (3) locking lugs (indentations).
These lugs will slide straight into matching slots on
the male end of adjacent pipes and
fi
ttings. Push the
pipe sections together and twist one section clockwise
approximately one-quarter turn until the sections are
fully locked.
Figure 15
NOTE: Sealant is not required to assemble
fi
replace
venting. Do not use silicone sealant at the inner
fl
ue
exhaust connections.
VENTING INSTALLATION
Female Locking
Lugs
Male Slots
NOTE:
Horizontal
runs of vent must
be supported every
three feet (914 mm).
Use wall straps for
this purpose.
Figure 15 -
Rigid Vent Pipe Connections
REAR WALL VENT INSTALLATION (5" x 8"
VENTING ONLY)
When installed as a rear vent unit, this appliance may be
vented directly to a termination located on the rear wall
behind the appliance. Only an Vermont Castings Group
brand termination is allowed for this application.
•
The maximum horizontal distance between the rear
of the appliance and the termination is 20" (508 mm).
Figure 14
Maximum
20"
Top View Flat Installation
Figure 14 - Rear Vent Application, Maximum Horizontal
Distance
10
1
/
2
"
(267 mm)
10
1
/
2
"
(267 mm)
8
1
/
2
"
(216 mm)
Figure 16 -
Exterior Wall Framing Dimensions
Combustible Wall
Noncombustible
Wall
FP1954
2. Refer to venting and termination instructions for further
instructions.
3. Locate and cut the vent opening in the wall. For com-
bustible walls
fi
rst frame in opening.
Combustible Interior Walls:
Cut a 12
1
/
2
" x 10
1
/
2
" hole
through the interior wall.
Combustible Exterior Walls:
Cut a 10
1
/
2
" x 10
1
/
2
"
square hole through the exterior wall frame.
Figure 16
Noncombustible
Walls:
Hole opening should be 8
1
/
2
"
(216 mm) in diameter.
4. The center of the hole should align with the center line
of the horizontal rigid vent pipe end. Allow 1/4" minimum
rise per foot.
Figure 16
5. 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 (4) wood screws supplied.
Figure 17
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
Duravent or Selkirk Terminations only. The vinyl siding
standoff prevents excessive heat from melting the
vinyl siding material.
NOTE:
Vermont Castings Group
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.
Figure 18
