Rear (Through The Wall) Applications - MHSC CDVR33 Installation And Operating Instructions Manual

VENTING INSTAllATION
ReAR (THRoUGH THe WAll) APPlICATIoNS
When installed as a rear vent unit this appliance may be vented directly to a termination located on the rear
wall behind the appliance
• The maximum horizontal distance between the rear of the appliance and the outside of termination is 20"
(508 m). Figure 14
• Only one 45° elbow is allowed in these installations.
Maximum
20"
Top View Flat Installation
Figure 14 - Rear Vent Application,
Maximum Horizontal Distance
1. Rigid vent pipes and fittings have special
twist-lock connections. Assemble the
desired combination of pipe and elbows
to the appliance adaptor.
Twist-lock Procedure: The female ends of
the pipes and fittings have three locking
lugs (indentations). These lugs will slide
straight into matching slots on the male
end of adjacent pipes and fittings. Push
the pipe sections together and twist one
section clockwise approximately one-quar-
ter turn until the sections are fully locked.
Figure 15
2. Locate and cut the vent opening in the
wall. For combustible walls first frame in
opening.
Combustible Interior Walls:
9 1 / " W hole through the interior wall.
2
Combustible exterior Walls:
x 9 1 / "W square hole through the exterior
2
wall frame. Figure 16
Noncombustible Walls:
should be 7 1 / " (190 mm) in diameter.
2
3. The center of the hole should line up with
the center line of the horizontal rigid vent
pipe end. Allow 1 /
4
Figure 16
69D0023
Cut a 11 1 / "H x
2
1
Cut a 9 / "H
2
Hole opening
" minimum rise per foot.
Figure 15 - Rigid Vent Pipe Connections
1
9 /
2
(241mm)
1
9 / "
2
(241mm)
3
3 / "
4
(92mm)
1
7 / "
2
(190mm)
Figure 16 - Exterior Wall Framing Dimensions
CDV Series Gas Fireplace
Female
Locking Lugs
Note: Horizontal runs of vent
must be supported every three
feet (914 mm). Use wall straps
for this purpose.
Male Slots
"
19