180-CL2118.IPI.1 v1.00
August 5, 2020
Page 42
CL2118.IPI.1
INSTALLATION
NOTE:
•
If an offset is necessary in the attic to avoid
obstructions, it is important to support the vent pipe
every 3’0” (914 mm), to avoid excessive stress
on the elbows, and possible separation. Use wall
straps as needed. (
Fig.26
)
• As much as possible use 45° elbows rather
than 90° elbows. With 45° elbows there is less
restriction to the flow of flue gases and intake air.
•
For multi story installations; a ceiling firestop is
required at the second floor, and any subsequent
floors (
Fig.27
). The opening should be framed to
10” (254 mm) x 10” (254 mm) inside dimensions, in
the same manner as shown in (
Fig.25
).
•
Any occupied areas above the first floor, including
closets and storage spaces, which the vertical vent
passes through, must be enclosed. The enclosure
may be framed and sheet-rocked with standard
building materials. However consult the appliance
manufactures installation instructions for the
minimum allowable clearance between the outside
of the vent pipe, and the combustible surfaces of
the enclosure. Do not fill any required air spaces
with insulation.
Fig.26
Fig.27
