CFM Corporation ODSHR42 - Manual (Page 12)

12
ODSHR Outdoor Woodburning Fireplace
20002264
Installing the Chimney System
Start by attaching the first chimney section to the collar
on top of the fireplace.
Install the pipe as pictured in Figure 17. When you
get a good lock, you will hear the pipe clearly snap
together. Once sections are snap-locked in place, it is
extremely difficult to get them apart. Make sure the
pipe is firmly snapped and locked together as each
pipe section is mounted.
When installing elbows, only outer pipe will snap-
lock. Middle pipes simply slide into position. Be sure
to always attach straps on upper elbow to a structural
framing member. (Fig. 18)
Continue installing the pipe as required until pipe is
installed up through the ceiling. At this point, you must
install a firestop spacer.
Installing the Firestop Spacer
in the Ceiling Hole
A firestop spacer is used to keep pipe spaced properly
and required for safety.
Nail the firestop spacer (at each corner) to the framing
members of the ceiling hole. NOTE: A firestop spacer
is not required at the roof.
Hole sizes listed in Figure 12 for angled firestop spac-
ers provide minimum required air space to chimney
pipe for ceiling thickness up to 8" (203 mm). When
combined thickness of ceiling material, ceiling joists
and flooring material exceeds 8" (203 mm), adjust-
ments must be made in framing to assure that minimum
air spaces to chimney are maintained.
Proper Firestop Spacer Installation
Figure 19 shows different installation procedures for
both an area that is an attic and an area that is not an
attic.
If the area above the
ceiling is not an attic, po-
sition the firestop spacer
with the flange on the ceil-
ing side and the angled
portion extending up into
the hole.
If the area above the
ceiling is an attic, position
the firestop spacer with
the flange on the top of
the framed hole and the
angled portion extending
down into the hole.
FP270/271
CR Series
2/19/99 djt
Elbow Strap
Angled Strap
Fig. 18 Attach straps to a structural framing member.
FP270/271
Support Structure
Elbow Strap
(must be tight)
Ceiling
Hole
Framing
Angle Firestop
Chimney Support
Strap
(must be tight)
Attic Installation Ceiling Installation
Fig. 19 Installing firestop spacer.
FP285
IWF285
mbuf
5/25/96
Nails (4)
Firestop Spacer
Joist
Joist
Firestop
Spacer
Nails (4) Flange Down Into Hole
Flange Up Into Hole
UP
FP558SHR
snap lock
5/11/99 djt
FP558SHR
Fig. 17 Install pipe, listening for the snap-lock to fasten.
Inner Pipe
Section
Hem
Lance
Pipe
Rim
Pipe
Rim