Operating instructions
16
51D0528
LX Series Direct Vent Gas Fireplace
When installed as a rear vent unit this appliance may be
vented directly to a termination located on the rear outside
termination behind the appliance
• 45° elbows may only be attached to rear when used to
direct the ue skyward (to achieve additional rise). Do
not attach 45° elbows to rear of appliance in which the
ue turns either left or right and terminates horizontal.
• The maximum horizontal distance between the rear
of the appliance and the outside face of the outside
termination is 20" (508 m). Figure 14
FP1188
rear wall install
20”
(508 mm)
Max.
20”
(508 mm)
Max.
Figure 14 -
Rear Vent Application,
Maximum Horizontal Distance
FP1188
1. Locate and cut the vent opening in the wall. For com-
bustible walls rst frame in opening. Figure 15
Cut a 11Z\x"H x 9Z\x" W (292 x 24
mm) hole through the exterior wall and frame as shown.
Figure 15
Hole opening should be 7Z\x"
(190 mm) in diameter.
VO584-100
Vent Opening
2/99 djt
9Z\x"
(241 mm)
11Z\x"
(292 mm)
Fireplace Hearth
Framing Detail
7Z\x"
(190 mm)
Fireplace Hearth
VO584-100
Figure 15 -
Locate Vent Opening on Wall
FP1953
rigid pipe
Figure 16 -
Rigid Vent Pipe Connections
Female
Locking Lugs
Male Slots
FP1953
2. Rigid vent pipes and ttings have special twist-lock
connections. Assemble the desired combination of pipe
and elbows to the appliance adaptor with pipe seams
oriented towards the wall or oor.
Twist-lock Procedure: The female ends of the pipes
and ttings have three locking lugs (indentations).
These lugs will slide straight into matching slots on
the male end of adjacent pipes and ttings. Push the
pipe sections together and twist one section clockwise
approximately one-quarter turn until the sections are
fully locked. Figure 16
3. Attach vent pipe assembly to the replace. Set replace
in front of its permanent location to insure minimum
clearances. Mark the wall for a 11Z\x"H x 9Z\x"W (292 x 24
mm) rectangle hole (for noncombustible material such
as masonry block or concrete, a 7Z\x" [190 mm] diameter
hole is acceptable). Figure 15. The center of the hole
should line up with the center line of the horizontal rigid
vent pipe end. Be sure to allow for minimum rise. Cut
a 11Z\x" x 9Z\x" (292 X 241 mm) rectangle hole through
combustible exterior wall (7Z\x" [190 mm] diameter hole
if noncombustible). Frame as necessary. Allow 1/4"
minimum rise per foot. Figure 15
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. Figure 17
Replace the wood screws with appropriate fasteners
for stucco, brick, concrete, or other types of siding.