12
WMC Series Woodburning Fireplace
20000583
FP593
SR/C
11/20/97
Fig. 19
Installing firestop spacer.
FP593
Nails (4)
Firestop Spacer
Joist
Attic Installation
Ceiling Installation
Joist
Firestop Spacer
Nails (4)
FP263
Fig. 20
Attic shield installlation (Canadian requirement).
IGF263
MBUF
5/9/96
Attic Insula-
tion Shield
Ceiling
Base
Flanges
Nails
(4 required)
Attic Joist
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.
Firestop spacers are not available for nor are they required
on vertical walls.
DO NOT
put any sealant around the area where the outer
pipe slides through the firestop spacer. If you seal this
area,
it may cause a fire hazard.
Canadian Requirements for
Insulation Shield
In Canada, an attic insulation shield is required to prevent
attic insulation from contacting the chimney section.
NOTe:
If the attic insulation shield is used, the firestop is not re-
quired in the attic installation. Framing dimensions for the
chimney hole should measure 14
Z\x
" x 14
Z\x
" (368 x 368
mm) for SK8; 17
Z\x
" x 17
Z\x
" (445 x 445 mm) for 3-wall. An
attic shield MUST be installed on top of attic joists (above
the floor level). (Fig. 20)
NOTe:
In the U.S., it is a good idea, although not always
required, to install an attic insulation shield where blown-in
insulation is planned to be used in the attic.
Install the attic insulation shield with the flanges on its base
extending down into the framing hole. Nail each corner of
attic insulation shield to the framing members of the ceil-
ing hole using 8d nails. Attic shields are not required at
the roof.
Continue Installing Pipe to Complete Run
Continue attaching pipe sections to complete system
to next level always being careful that the pipe is firmly
snapped locked in place before proceeding to next pipe
section.
Chimney Supports
If chimney supports are required, they are installed the
same as elbows. Nail chimney support straps to adjacent
structural framing, as shown on Page 7, Figure 7. Bend
straps as necessary and make sure they are secure so
they will support the weight of the chimney. A chimney sup-
port is 2
Z\x
" long when installed. Consider this dimension
when determining how many straight chimney sections
are needed.
NOTe:
Chimney supports are generally used in long runs
in a chase installation.
Additional Ceilings
If you encounter additional ceilings, repeat same steps
required for first ceiling installation. Refer to firestop il-
lustration on Figure 19.
Penetrating the Roof
Run pipe to roof line. Since chimney system must be
vented to the out-of-doors, you
must
use an approved
termination.
If a chase is used, refer to the installation manual provided
with the termination cap.
Locate Chimney Centerpoint On Roof
Use same procedure detailed in locating center point of
the flue system.
Drive a nail up through roof at the center point. This will
determine center point on outside of the roof.
NOTe:
If the attic insulation shield is used, the firestop is not
required in the attic installation.
