Installation For Vertical Termination - MHSC CDVR33 Installation And Operating Instructions Manual

VENT 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 30 to avoid cut-
ting load bearing members.
For optimal flame appearance, a restrictor disk is necessary
on straight vertical runs of 20' of more.
• Runs may not incorporate elbows.
• The disk is part number 45D0551 and is included in
installation manual packet.
• Drop the disk into a 4" 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 shows in Figure 13, Page 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 9 1 / " (241mm) square hole in the ceiling using the
2
locating hole as a center point The opening should be
1 1
framed to 9 / "x9
2
sions as shown in Figure 32using framing lumber the same
size as the ceiling 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 31. Otherwise, install firestop
below the framed hole. Figure 32.
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.
Figure 15, Page 19
69D0023
/ " (241 mm x 241 mm) inside dimen-
2
Figure 30 - Offset with Wall Strap and 45°
Figure 31 - If Area Above is a Room, Install
Firestop above Framed Hole as Shown
Figure 32 - If Area Above is Not a Room, Install
Firestop under Framed Hole as Shown
Continued
CDV Series Gas Fireplace
Wall
Strap
Ceiling Firstop
Elbows
Firestop
9
"
1
/
/
1
2
"
9
2
Nails
Firestop
Roof
Flashing
45° Elbows
Nails
25