Monessen Hearth DIRECT VENT GAS FIREPLACE KHLDV400 - Manual (Page 19)

73D0024 19
KHLDV Series Gas Fireplace
VentInG InStaLLatIon
example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
24" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 23 -
Maximum Elbow
Usage
FP1179
InStaLLatIon For VertIcaL terMIna-
tIon
1. Determine the route your vertical venting will take. If
ceiling joist, roof rafters or other framing will obstruct
the venting system, consider an offset. Refer to Figure
24 to avoid cutting load bearing members.
FP1969
offset w/ wallstrap
Figure 24 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firstop
FP1669
For optimal flame appearance, a restrictor disk is necessary
on straight vertical runs of 10' of more.
• Runs may not incorporate elbows.
• The disk is part number 56D3027 and is included in
installation manual packet.
• Drop the disk into a 5" inner collar before installing
the first section of flue or install at the last section
before installing the termination.
• An additional disk may be installed on runs of 35' or more.
Rotate disks perpendicular to each other.
note: Pay special attention to these installation instructions
for required clearances (air space) to combustibles when
passing through ceilings, walls, roofs, enclosures, attic
rafters, etc. Do not pack air spaces with insulation. Also
note maximum vertical rise of the venting system and any
maximum horizontal offset limitations. Offsets must fall
within the parameters shown in Figures 23 and 24.
2. Set fireplace in desired location. Drop a line plumb down
from the ceiling to the position of the flue exit. Mark the
center point where the vent will penetrate the ceiling.
Drill a small locating hole a this point.
Drop a plumb line from the inside of the roof to the ceiling
locating hole in the ceiling. Mark the center point where
the vent will penetrate the roof. Drill a small locating hole
at this point.
FLat ceILInG InStaLLatIon
1. Cut a 10
1 /
2
" (241 mm) square hole in the ceiling using
the locating hole as a center point The opening should
be framed to 10
1 /
2
"x10 1 /
2
" (241 x 241 mm) inside dimen-
sions as shown in Figure 26 using framing lumber the
same size as the ceiling joist. If the area above the ceil-
ing is an insulated ceiling or a room, nail firestop from
the top side. This prevents loose insulation from falling
into the required clearance space. Figure 25. Otherwise,
install firestop below the framed hole. Figure 26
FP1969
firestop w room above
Figure 25 - If Area Above is a Room, Install Firestop
above Framed Hole as Shown
Firestop
Nails