Hearth and Home Technologies MONTANA 42 EN - Manual (Page 17)

Outdoor Lifestyles by Hearth & Home Technologies Inc. • Montana US-CAN • 4039-156 Rev P• 10/12 17
E. Install the Attic Insulation Shield
An insulation shield must be installed when there is a pos-
sibility of insulation coming into contact with the factory built
chimney system.
• Bend the tabs at the top of the attic insulation shield inward.
This will help keep the chimney section centered in the
shield.
• Position the shield over the vertical chimney section where
it penetrates a ceiling firestop.
• Slide the shield down until it rests on the ceiling firestop.
The ceiling firestop will support the insulation shield. See
Figures 5.4 and 5.5.
F. 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 un-
der Section 5.A. Chimney Requirements.
Check each section by pulling up slightly from the top to en-
sure proper engagement before installing the succeeding
sections. If they have been connected correctly, they will not
disengage when tested.
G. Secure the Chimney
When offsets and returns are joined to straight pipe sections,
they must be locked into position with the screws provided*
(outer only), using the predrilled holes. To prevent gravity
from pulling the chimney sections apart, the returns and the
chimney stabilizers have hanger straps for securing these
parts to joists or rafters. See Figure 5.6.
* or equivalent #6 or #8 sheet metal screw no longer than
3/4 in. (19 mm).
24 in.
(610 mm)
Attic
Insulation
Shield
Chimney
Insulation
13 in.
(330 mm)
17 in.
(423 mm)
Ceiling Firestop
Tabs
Figure 5.4 Install Attic Insulation Shield Above the Ceiling
Attic
Insulation
Shield
Chimney
Insulation
Ceiling Firestop
Tabs
24 in.
(610 mm)
13 in.
(330 mm)
17 in.
(423 mm)
Figure 5.5 Install Attic Insulation Shield Below the Ceiling
Ceiling
Firestop
Straps
Optional
Additional
Support
Joint
Band
(Optional)
Figure 5.6 Secure the Chimney
Fire Risk
• DO NOT pack insulation or other
combustibles: between ceiling firestops;
between chimney and attic insulation
shield.
• ALWAYS maintain specified clearances
around chimney and ceiling firestops.
• Install ceiling firestops as specified.
Failure to keep insulation or other material
away from chimney pipe may cause fire.
WARNING
Fire Risk
• Secure offsets with screws (not to exceed
3/4 in./19 mm in length).
WARNING
• Secure returns with strapping.
• Straight chimney sections may be secured with screws
(not to exceed 3/4 in./19 mm in length) at the joints.
Keep chimney sections from separating or twisting.