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Designer Series Direct Vent Gas Fireplace
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 19
Maximum
20"
(508 mm)
Figure 19 -
Rear Vent Application Maximum
Horizontal Distance
•
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 20
NOTE: Seal-
a n t i s n o t
required to
a s s e m b l e
f i r e p l a c e
venting. Do
not use sili-
cone sealant
at the inner
fl ue exhaust
c o n n e c -
tions.
20
Top View Flat
Installation
Female Locking
Lugs
NOTE: Horizontal runs of
vent must be supported
every three feet (914
mm). Use wall straps for
this purpose.
Male Slots
Figure 20 -
Rigid Vent Pipe Con-
nections
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
through the interior wall.
Combustible Exterior Walls: Cut a 10
square hole through the exterior wall frame. Figure 21
Noncombustible Walls: Hole opening should be 8
(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 21
Vent Opening for Combustible Walls
10
1
⁄
"
2
(267 mm) Min.
10
1
⁄
"
2
(267 mm)
Min.
Fireplace Hearth
Opening for Noncombustible Wall
8
1
⁄
"
2
(216 mm)
Fireplace Hearth
Figure 21 -
Locate vent opening on wall
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 22
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 23
VENTING INSTALLATION
1
/
" x 10
2
1
/
" x 10
2
Framing Detail
FP2293
20306750
1
/
" hole
2
1
/
"
2
1
/
"
2
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