Heat & Glo MEZZO-1000-AU Installation Manual page 46

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 in. (51 mm)
(FACTORY-INSTALLED NON-COMBUSTIBLE BOARD)
NON-COMBUSTIBLE MATERIAL
ONLY IN THIS AREA
MAXIMUM SCREW LENGTH = 1 in. (25
mm) (LOWER COVER PANEL)
= NO FASTENERS IN THIS AREA
Figure 10.1 Screw Length Requirements
The appliance is designed to mate with 1/2 in. (13 mm)
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 finished 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 fireplace, should be rated at a
minimum continuous exposure to 300
Finishing Around Opening with Gypsum Wallboard
Gypsum wallboard (drywall) joints adjacent to the fire
place opening, including the non-combustible board on
the appliance, require special attention to minimize
cracking. When installing gypsum wallboard around the
fireplace, install the hole for the fireplace opening in a
single wallboard sheet, if possible. This will minimize the
joints adjacent to the fireplace opening.
Tape wall board joints around the fireplace opening with
fiberglass-mesh tape. It will provide a more crack-resis
tant joint than paper tape. Fill, smooth and finish 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 finishing includes a painted wall, 100% acrylic
latex with compatible primer is recommended around
this appliance. Oil-based or standard acrylic paints may
discolor due to heat exposure.
Heat & Glo • MEZZO-1000-AU, MEZZO-1300-AU, MEZZO-1300ST-AU, MEZZO-1600-AU Installation Manual • 2304-970 Rev. D • 3/15
44
2 in.
51 mm
-
° °
F (149 C).
-
-
-
WARNING! Risk of Fire! DO NOT apply combustible
materials beyond the minimum clearances. Comply with
all minimum clearances to combustibles as specified 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 finishing materials must not interfere
with air flow through louvers or decorative fronts.
 Facing
and/or finishing
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 materials are allowed.
1/2 in. (13 mm) THICK
WALL SHEATHING
Figure 10.2 Finishing and Facing Materials - Single-sided Models
materials must never
BOTTOM
FINISHING
TEMPLATE