Install Attic Insulation Shield - Heatilator BIR42-B Installation Manual

E. Install Attic Insulation Shield
WARNING! Risk of Fire!
lation shield when there is any possibility of insulation or
other combustible material coming into contact with the
chimney.
• DO NOT pack insulation between the chimney and the
attic insulation shield.
• Failure to keep insulation and other materials away from
chimney pipe could cause fi re.
• DO NOT offset chimney inside insulation shield.
Installation of a ceiling fi restop is required:
• Refer to Figures 5.5, 5.6, 5.7.
• Roll the shield (around the chimney if already installed)
until you have a 3 in. (76 mm) overlap and the three holes
on each side match up (large holes on top).
• Insert three screws into the matching holes to form a
tube.
• Bend three tabs on the bottom of the tube inward to 90°
to maintain chimney air space.
• Rest the insulation shield on the ceiling fi restop below.
• Bend the three short tabs at the top of the shield inward
to 90° to maintain the 2 in. (51 mm) air space from the
chimney.
• Bend the remaining top tabs to just meet the pipe.
If you wish to make a custom shield or barrier, follow
these guidelines:
• Metal is preferred, although any material stiff enough to
hold back the insulation can be used.
WARNING! Risk of Fire!
materials that can defl ect under humidity or other envi-
ronmental conditions is not recommended.
• The shield or barrier must be tall enough to extend
above the insulation and prevent blown-in insulation from
spilling into the cavity.
• Maintain specifi ed air spaces around chimney.
• Check instructions and local codes for further details.
Double-check the Chimney Assembly
Continue assembling the chimney sections up through
the ceiling fi restops as needed. While doing so, be
aware of the height and unsupported chimney length
limitations.
Check each section by pulling up slightly from the top
to ensure proper engagement before installing the suc-
ceeding sections. If they have been connected correct-
ly, they will not disengage when tested.
Heatilator • Birmingham 42-B Installation Manual • 4059-715 • Rev C • 2/14/13
You MUST install an attic insu-
Use of cardboard or other
Bend inward
90°
Figure 5.5 Prepare Attic Insulation Shield
6 Tabs bent
Insulation
13 in.
(330 mm)
Figure 5.6 Install Attic Insulation Shield (fi restop above ceiling)
6 Tabs bent
Insulation
13 in.
(330 mm)
Figure 5.7 Install Attic Insulation Shield (fi restop below ceiling)
Bend remaining tabs
to rest against pipe to
prevent insulation
from falling in.
Insert three
screws
3 in. (76 mm)
overlap
Tabs bent in to
rest against pipe
Pipe
Attic Insulation Shield
17 in. (432 mm)
diameter
in 90°
Ceiling Firestop
Pipe
Insulation
Tabs bent in to
rest against pipe
Pipe
Attic Insulation Shield
17 in. (432 mm)
diameter
in 90°
Insulation
Ceiling Firestop
Pipe
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