Heatilator CRAVE4836 Installation Manual page 42

WARNING! Risk of Fire, Explosion or Asphyxiation!
DO NOT use screws more than one inch long on lower
cover panel. Longer screws may penetrate gas line or
damage valve or electrical components.
MAXIMUM SCREW LENGTH = 2 INCHES
(FACTORY-INSTALLED NON-COMBUSTIBLE BOARD)
NON-COMBUSTIBLE MATERIAL
ONLY IN THIS AREA
MAXIMUM SCREW LENGTH = 1 INCH
(LOWER COVER PANEL)
Figure 10.1 Screw Length Requirements
The appliance is designed to mate with 1/2 in. wall
sheathing materials such as drywall, plywood, wood
composites, or non-combustible materials.
Note: It is acceptable to use a high temperature silicone
sealant to adhere drywall to lower cover panel.
Finish and Sealing Joints
All joints between the fi nished wall sheathing and the ap-
pliance must be sealed with non-combustible materials.
Sealants, such as caulk or mastic used to seal the gap
between the wall and the fi replace, should be rated at a
minimum continuous exposure to 300ºF.
Finishing Around Opening with Gypsum Wallboard
Gypsum wallboard (drywall) joints adjacent to the fi re-
place opening, including the non-combustible board on
the appliance, require special attention to minimize crack-
ing. When installing gypsum wallboard around the fi re-
place, install the hole for the fi replace opening in a single
wallboard sheet, if possible. This will minimize the joints
adjacent to the fi replace opening.
Tape wall board joints around the fi replace opening with
fi berglass-mesh tape. It will provide a more crack-resis-
tant joint than paper tape. Fill, smooth and fi nish wall
joints with chemically setting-type joint compound. It will
provide a more crack-resistant joint than air-drying light-
weight compound.
Painting
If desired fi nishing includes a painted wall, 100% acrylic
latex with compatible primer is recommended around this
appliance. Oil-based or standard acrylic paints may dis-
color due to heat exposure.
Heatilator • CRAVE4836, CRAVE4836ST, CRAVE6048, CRAVE6048ST Installation Manual • 2301-970 Rev. E • 8/14
42
WARNING! Risk of Fire! DO NOT apply combustible
materials beyond the minimum clearances. Comply with
all minimum clearances to combustibles as specifi ed in
this manual. Overlapping materials could ignite and will
interfere with proper operation of doors and louvers.
WARNING! Risk of Fire! DO NOT install drywall or
other combustible materials directly onto the factory-
installed non-combustible board. Overlapping materials
could ignite.
Facing Material
• Facing and/or fi nishing materials must not interfere with
air fl ow through louvers or decorative fronts.
• Facing and/or fi nishing materials must never overhang
into the glass opening.
• Observe all clearances when applying combustible
materials.
Finishing - Hearth
See Inside Fit or Overlap Method sections to determine
the necessary requirements for installation of a non-
combustible hearth for this model. Only hearths made of
non-combustible are allowed.
1/2 IN. THICK WALL
SHEATHING
Figure 10.2 Finishing and Facing Materials
1/2 IN. FACTORY-INSTALLED
NON-COMBUSTIBLE BOARD
NON-COMBUSTIBLE
FINISHING MATERIAL
OVERLAP FIT = 0-1 IN. THICK
INSIDE FIT = 0-4 IN. THICK
BOTTOM
FINISHING
TEMPLATE