Superior MHW36R Installation And Operation Instructions Manual page 5

FRAMING
1. Frame opening for fireplace using dimen-
sions shown in Figures 1 and 2.
2. The fireplace may not be installed on
carpeting, tile (other than ceramic) or any
combustible material other than wood
flooring, fireplace must be installed on a
metal or wood panel extending full width
and depth of fireplace. (It is acceptable to
cover two outside ends or columns of top
louver panel leaving four center columns
open).
3. Set fireplace directly in front of this open-
ing and slide unit back until nailing flanges
touch side framing.
4. Check level of fireplace and shim with
sheet metal if necessary.
5. Before securing fireplace to prepared fram-
ing, metal ember protector (provided) must
be placed between hearth extension (not
supplied) and under bottom front edge of
fireplace to protect against glowing embers
falling through. If fireplace is to be installed
on a raised platform, a Z-type ember pro-
tector (not supplied) must be fabricated to
fit your required platform height. Ember
protector should extend under fireplace
a minimum of 1
should be made of metal material.
6. Using screws or nails, secure fireplace to
framing through flanges located on sides
of fireplace (see Figure 4).
Nailing
Flange
Figure 4 - Nailing Flanges
127312-01B
FireplaCe inSTallaTion
/ ". The ember protector
1
2
Screw
or Nail
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Continued
HEARTH ExTENSION
A hearth extension projecting a minimum of
16" in front of and a minimum of 8" beyond
each side of the fireplace opening is required
to protect combustible floor construction in
front of the fireplace. Use an equal material
which meets the following specifications: a
layer of noncombustible, inorganic material
having a thermal conductivity of k = .84 BTU
IN/FT HR °F (or less) at 1" thick. For example,
2
if the material selected has a k factor of 0.25,
such as glass fiber, the following formula
would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
Thermal conductivity "k" of materials can be
obtained from the manufacturer or supplier of
the noncombustible material. If the hearth ex-
tension is to be covered, use noncombustible
material such as tile, slate, brick, concrete,
metal, glass, marble, stone, etc. Provide
a means to prevent hearth extension from
shifting and seal gap between fireplace frame
and hearth extension with a noncombustible
material (see Figure 5).
WARNING: Hearth extension
is to be installed only as shown
in Figure 5.
Fireplace
Front
Ember
Protector
Fireplace Front
Elevated
Figure 5 - Hearth Extension
Seal Gap
Hearth
Seal Gap
Extension
Ember
Protector
5