Installation of a ceiling firestop is required:
• Refer to Figures 6.7, 6.8, 6.9.
• Roll the shield (around the chimney if already installed)..
The three holes on each side will match up (large holes
on top).
• Insert three screws into the matching holes to form a
tube.
• Bend the tabs on the bottom of the tube inward to 90° to
maintain chimney air space (refer to Figure 6.8).
• Rest the insulation shield on the ceiling firestop below.
• Bend the tabs at the top of the shield inward to 90° to
maintain the 2 in. (51 mm) air space from the chimney.
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!
Use of cardboard or other
materials that can deflect 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 specified air spaces around chimney.
• Check instructions and local codes for further details.
Insert three
screws
Tabs bent 90°
Figure 6.7 Prepare Attic Insulation Shield
Tabs
bent in 90°
and taped
Tabs bent 90° to
rest against pipe
Attic Insulation Shield
Ceiling Firestop
10-1/2 in.
(267 mm)
14-1/2 in. (368 mm)
diameter
Insulation
Insulation
Pipe
Pipe
2 in. (51 mm)
air space
Tabs bent
in 90°
and taped
Tabs bent in to
rest against pipe
Attic Insulation Shield
Ceiling Firestop
10-1/2 in.
(267 mm)
14-1/2 in. (368 mm)
diameter
Insulation
Insulation
Pipe
Pipe
2 in. (51 mm)
air space
Figure 6.8 Install Attic Insulation Shield (firestop above ceiling)
Figure 6.9 Install Attic Insulation Shield (firestop below ceiling)
F. Install Attic Insulation Shield
WARNING! Risk of Fire!
You MUST install an attic insu-
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 fire.
•
DO NOT
offset chimney inside insulation shield.
Double-check the Chimney Assembly
Continue assembling the chimney sections up through
the ceiling firestops as needed. While doing so, be
aware of the height and unsupported chimney length
limitations given under Section 5.
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.
29
Heat & Glo • NORTHSTAR • 480-2360 Installation Manual • Rev H • 8/20/14
