Monessen Hearth KHLDV400 - Manual (Page 19)

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KHLDV Series Gas Fireplace VentInG InStaLLatIOn
InStaLLatIOn FOr VertIcaL terMInatIOn
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 20 to avoid cutting
load bearing members.
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 instal-
lation 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 19 and 20.
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 dimensions as shown
in Figure 22 using framing lumber the same size as the ceil-
ing joist. If the area above the ceiling 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
21. Otherwise, install firestop below the framed hole. Figure
22
2. Assemble the desired lengths of pipe and elbows necessary
to reach from the burner system flue up through the firestop.
Be sure pipe and elbow connections are fully twist-locked.
FP1969
firestop w room above
10
1 /
2
" 10
1
/
2
"
FP1970
firestop no room
Figure 21 - If Area Above is a Room, Install Firestop
above Framed Hole as Shown
Figure 22 - If Area Above is Not a Room, Install
Firestop above Framed Hole as Shown
Firestop
Nails
Nails
Firestop
FP1969
offset w/ wallstrap
Figure 20 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firstop
FP1669
FP1970