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2
INTERIOR STRAIGHT INSTALLATION - SINGLE FLOOR
Reduced Clearance
Support (RCS)
Figure 3
The Reduced Clearance Support (RCS) at the attic
level, doubles as an attic radiation shield.
The square-to-round collar (supplied) is used
to close off the top of the support box. This
prevents construction debris and attic insulation
from falling within (see Figure 4).
NOTE: Where additional height is needed for the RCS, a
support extension (SE) is available. See page 11.
NOTE: A Finishing Support (FSC) combined with an
Attic Radiation Shield (AARS) can also be
used for this application. Refer to page 8 for
installation guide.
Step 1: Locate the chimney in a convenient place as
near as possible to the appliance outlet.
Step 2: Cut and frame the openings in the ceiling and
roof where the chimney will pass.
NOTE: It is important to follow the framing dimensions
for the floor openings prescribed in this manual.
CHIMNEY
Reduce Clear-
SIZE
ance Support
6"
12-1/8'' x 12-1/8''
7"
13-1/8'' x 13-1/8''
8"
14-1/8" x 14-1/8"
6
NAILS OR SCEWS
FRAMING DIMENSION
ROOF
OPENING
14'' x 14''
15'' x 15''
16" x 16"
Table 3
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
2" CLEARANCE
TO ROOF FRAMING
1 1
3 3
min
min
2 2
Reduced Clear.
Support (RCS)
Figure 4
Step 3: From below push the square support into
the framed opening making sure the square
support extends a minimum of 3 1/2" below
the finished ceiling. Attach the support to the
framed box using (12) - 3" spiral nails or #8 x 1
1/2" wood screws (see Figure 3). Screw finish
trim (included) to the ceiling.
Step 4: Wrap the insulation pad around the bottom
of the first chimney length. Additional pieces of
insulation can be loosely tucked down within
corners. Do not compress insulation, this
reduces effectiveness.
Step 5: Put this first chimney length in the support.
Turn in clockwise to lock it in place.
NOTE: Make sure arrow on pipe label is pointing
upward.
RAIN CAP
STORM COLLAR
FLASHING
COLLAR
(INCLUDED)
FINISH TRIM
INSULATION
"ROCKWOOL"
(INCLUDED)
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