Hearth and Home Technologies A42CH EN - Manual (Page 27)

Heatilator • A36C & A42C • 28396 Rev Y • 10/06 27
B. Finishing Material
• Combustible Material
Material which is made of or surfaced with wood,
compressed paper, plant fi bers, plastics, or any material
capable of igniting and burning, whether fl ame proofed or
not, plastered or not plastered.
• Non-Combustible Material
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in a
Vertical Tube Furnace at 750° C, shall be considered
non-combustible materials.
• Non-Combustible Sealant Material
Sealants which will not ignite and burn: Rutland, Inc.
Fireplace Mortar #63 or 76R, Nufl ex 302, GE RTV106,
RTV116 (or equivalent).
After completing the framing and applying the facing material
(drywall) over the framing, a bead of non-combustible seal-
ant must be used to close off any gaps at the top and sides
between the fi replace and facing to prevent cold air leaks.
Large gaps can be bridged with fi berglass rope gasket.
Only non-combustible materials may be used to cover the
metal fi replace front.
D. Sidewalls/Surrounds
Adjacent combustible side walls must be located a minimum
of 12 in. (305 mm) from the fi replace opening. If you are us-
ing a decorative surround constructed of combustible ma-
terial, it must be located within the shaded area defi ned in
Figure 8.5. Short stub walls are also acceptable if they are
contained within the shaded area.
12 in. (305 mm)
min.
12 in. (305 mm)
max.
Top of
Fireplace
Opening
Mantel
1-1/2 in. (38 mm) max.
6 in. (152 mm) min.
Header
Standoff
Fire Risk
Do NOT obstruct air inlet or outlet grilles.
Do NOT modify grilles.
• Modifying or covering grilles could cause
temperature rise and fi re hazard.
Finishing materials must not interfere with:
• Air
fl ow through grilles or louvers
• Operation of louvers or doors
• Access for service
WARNING
C. Mantel
A combustible mantel may be positioned no lower than
12 in. (305 mm) above the top of the fi replace opening. The
combustible mantel may have a maximum depth of 12 in.
(305 mm). Combustible trim pieces that project no more
than 1-1/2 in.(38 mm) from the face of the fi replace can
be placed no closer than 6 in. (152 mm) from the top of the
fi replace opening. See Figure 8.4. Combustible trim must
not cover the metal surfaces of the fi replace. This mantel
clearance is in accordance with Section 7-3.3.3 of ANSI/
NFPA211.
Figure 8.4 Mantel Specifi cations
9-3/4 in.
(248 mm)
14-3/8 in.
(365 mm)
12 in.
(305 mm)
4 in.
(102 mm)
Brick
Front
Flush
Front
12 in.
(305 mm)
A
B
50 deg.
39 deg.
Figure 8.5 Sidewalls/Surrounds
Model #
A
Fireplace Opening
B
Outside Dimensions
A36
in. 36 42
mm 914 1067
A42
in. 42 48
mm 1067 1219
E. Glass Doors
This fi replace has been tested and listed for use with doors
as specifi ed in Section 12.B. Fireplace Components. Please
refer to the manual packed with each set of doors for instal-
lation instructions.
Fire Risk
Finish all edges and fronts to clearances and
specifi cations.
WARNING
• Metal fireplace front may be covered with non-
combustible material only.
• Do NOT overlap combustible materials onto fi replace front.
• Install combustible materials up to specifi ed clearances
on top front and side edges.
• Seal joints between the fi nished wall and fi replace top
and sides using only a 300° F minimum sealant.
Fire Risk
• Maintain
clearances.
• Use only non-combustible material below
standoffs, material such as cement board is
acceptable.
WARNING
• Framing or fi nishing material used on the front of, or
in front of, the appliance closer than the minimums
listed, must be constructed entirely of noncombustible
materials (i.e., steel studs, concrete board, etc.).
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