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424WBST Designer Woodburning Fireplaces
87D1506
Start by attaching the first chimney section to the collar
on top of the fireplace.
Install the pipe as pictured in Figure 16. 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.
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. 17)
Continue installing the pipe as required until pipe is
installed up through the ceiling. At this point, you must
install a firestop spacer. Refer to Figure 18 for appropri-
ate spacer orientation.
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. 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), adjustments
must be made in framing to assure that minimum air
spaces to chimney are maintained.
Figure 18 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 ceil-
ingan attic, posi-
tion 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 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.
FP711
Install pipe, listening for the snap-lock to fasten.
UP
Lance
Hem
Pipe Rim
Pipe
Rim
WF711
STR/CVR
5/28/98
Pipe Section
Attach straps to a structural framing member.
FP270/271
FP270/271
CR Series
2/19/99 djt
Support Structure
Elbow Strap
(must be tight)
Ceiling
Hole Fram-
ing
Angle Firestop
Chimney Support
Strap
(must be tight)
FP593
SR/C
11/20/97
Installing firestop spacer.
FP593
Nails (4)
Firestop
Spacer
Joist
Joist
Firestop
Spacer
Nails (4)
If the attic insulation shield is used, the
firestop is not required in the attic installation.