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4-00 15 30491D
BW36 SERIES WOODBURNING FIREPLACE
No one builds a better fire
Figure 12
Connecting Chimney
Sections
Figure 11
Offset Secured to Fireplace
STEP 5 - Preparing the Ceiling for Firestop
Spacers.
Mark and cut out an opening in the ceiling for the par-
ticular firestop spacer being utilized (14
1
⁄2" x 14
1
⁄2" for
an FS338, 14
1
⁄2" x 18
3
⁄4" for an FS339, or 14
1
⁄2" x 23"
for an FS340). Frame the opening with the same
dimension lumber used in the ceiling joists.
STEP 6 - Installing the Firestop Spacers.
Install the firestop spacer FS338 (Straight), FS339 (if
a 15° offset located is in the ceiling joist area) or
FS340 (if a 30° offset is located in the ceiling joist
area). Nail the four [4] sides of the firestop spacer to
the joists using a minimum of three [3] nails per side.
NOTE: The inner
flue is placed to
the inside of the
flue section
below it. The
outer casing is
placed outside
the outer casing
of the chimney
section below it.
See Figure 12.
STEP 4 - Assembling Chimney Sections.
Attach either a straight chimney section or an offset to
the top of the fireplace depending on your installation
requirement. When using offsets and returns, we highly
recommend securing in place on the top of the fireplace
with screws to permanently attach them to the top of the
fireplace. See Figure 11.
When using elbows right off of the top of the unit, you
will need to flatten the lances before you slip it on the
collar. Once it is on, line it up and secure it with screws
to the unit collar through the slots in the elbow.
Figure 13
Installing the Firestop Spacer
STEP 7 - Installing an AS8 insulation shield
An AS8 insulation shield should be installed when
there is a possibility of insulation coming into contact
with the factory-built chimney system. The AS8 is
installed by positioning it over the vertical chimney
section where it penetrates an FS338 firestop spacer.
The FS338 will support the AS8. See Figure 14 on
page 16. When the factory-built chimney penetrates
an insulated ceiling at either 15 or 30 degrees from
vertical, an insulation dam should be constructed from
plywood or sheet metal. A minimum 2" air space
must be provided between the insulation dam and the
factory-built chimney system.
These firestop spacers are designed to provide the
minimum two inch air space required around the
chimney. In all situations, the firestop spacers are to
be nailed to the ceiling joists from the bottom or fire-
place side, EXCEPT when the space above is an
insulated ceiling or attic space. In this situation, the
firestop spacer must be nailed from the top side to
prevent loose insulation from falling into the required
two inch air space around the chimney.
Firestop spacers must be used whenever the chim-
ney penetrates a ceiling/floor area.
CAUTION:
INNER FLUE AND OUTER LINER
SECTIONS CANNOT BE DISASSEM-
BLED ONCE LOCKED TOGETHER.
PLAN AHEAD TO INSURE THE
PROPER INSTALLATION HEIGHT IS
ACHIEVED WITH THE SELECTED
CHIMNEY COMPONENTS.
ROOM ABOVE
ATTIC ABOVE