Bosca LIMIT 450 Owner's Manual page 10

Minimum chimenev
clearance
lo brick
and combustibles
Zin. (50.8
mm)
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Minimum
12 in. {304.8
mm)
to combustibles
Minimum
clearance
9 in. (228.6
mm)
Chimnev
Conneclor
o
E
E
Use
chimnev
mlrs.-parts
trj
attach connector
securely
$asonry
\ \
r
UnlmneY Sheet steel
suppofts
Minimum chimenev clearance
t'o
sheet steel suo'Dorts
and
combustibles
2 in'.
(50.8
mm)
Two air channels
each lin.
{25.4mm}
Chimnev
connecl6r
Sheet steel
supports
Chimnev
Chimnev
connecl6r
-
Air
Soace
2 in. (5d.8
mm)
Minimum
clearance
1
in. (25.4
mm)
Masonrv
Chimney
Combustible Wall Chimney Connector
Pass
-
Throughs
Method A.12"
(304.8 mm) Clearance to
Combustible
Wall
Member:
Using
a
minimum thickness 3.5" (89 mm)
brick
and
a
5/8" (15.9
mm) minimum wall
thickness clay liner,
construct
a
wall
passthrough.
The
cla.y
liner must confor;n
to ASTM C315
(Standard Specification
for
Clay Fire Linings)
or
its equivalent.
Keep
a
minimum of
12" (304.8 mm) of
brick
masonry between
the
clay
liner and
wall combustibles.
The clay
liner shallrun
from the
brick
masonry outer
surface to the inner surface of
the
chimney flue liner
buinot
past the inner surface. Firmly
grout
or cement the clay liner in place to the chimney
flue liner.
Method
B.
9"
(228.6
mm) Clearance
to Combustible Wall
Member:
Using a 6"
(152.4
mm) inside diameter,listed, factory-
built
Solid-Pak
chimney section
with
insulation
of
l"
(25.4 mm)
or more,
build
a
wallpass-through with
a
minimum 9" (228.6
mm)
air space
between the outer wall
of
the chimney length
and wall combustibles.
Use
sheet metal supports
fastened
securely
to wall
surfaces
on
all
sides,
to
maintain the 9"
(228.6
mm)
air
space. When fastening
supports
to
chimney length,
do
not penetrate the chimney liner
(the inside wall of the
Solid-
Pak
chimney).
The
inner
end of the
Solid Pak
chimney section
shall
be flush
with
the inside of the masonry chimney flue,
and
sealed
with
a non-water soluble refractory cement.
Use this
cement
to
also seal
to
the brick
masonry penetration.
Method C.6"
(152.4 mm)
Clearance
to
Combustible Wall
Member:
Starting
with
a
minimum 24 gage (.024" [.61 mm])
6"
(152.4 mm) metalchimney
connector, and
a
minimum24
gage ventilated wall thimble which
has
two
air channels
of
1"
(25.4 mm)
each, construct
a
wallpass-through.
There
shall
be
a
minimum 6" (152.4)
mm separation
area containing fiberglass
insulation,
from the
outer
surface of the wall thimble
to
wall
combustibles. Support the wall
thimble, and cover
its
opening
with a Z4-gage minimum
sheet
metalsupport.
Maintain the
6"
(f
52.4
mm) space.
There
should
also be
a
support
sized
to fit
and hold the
metal
chimney connector.
See
that the
supports
are fastened securely to wall
surfaces
on
all sides. Make
sure
fasteners used
to
secure
the
metal
chimney connector do not
penetrate chimney flue
liner.
Method
D.
2"
(50.8
mm) Clearance
to
Combustible Wall
Member:
Start
with
a solid-pak listed
factory built chimney section
at least
I2"
(3O4 mm) long, with
insulation
of
1" (25.4 mm) or
more, and
an inside diameter
of 8"
(2 inches
[51
mm]
larger
than the 6"
1152.4
mml
chimney connector).
Use this
as
a pass-
through for
a minimum Z|-gage
single wall
steel
chimney
connector.
Keep solid-pak section
concentric with
and spaced
l"
(25.4 mm)
offthe
chimney
connector
by way
of sheet
metal
support plates at both
ends
of chimney section.
Cover
opening
with
and support chimney section on both
sides
with 24 gage
minimum
sheet metal supports.
See
that the supports
are
fastened
securely
to wall
surfaces
on
all
sides.
Make sure fasteners used
to
secure
chimney flue
liner.
NOTES:
L
Connectors to a masonry chimney, excepting method
B,
shall extend in one conlinuous
section
through the wall pass,through
system
and the chimney
wall, to
but not
past
the inner
flue liner face.
2.
A
chimney connector
shall
not
pass
through
an attic or
roof
space, closet
or
similar concealed space, or a floor, or ceiling.