Hearth Extension - Superior WRE3036WS Installation And Operation Instructions Manual

4. Check the level of the fireplace and shim
with sheet metal if necessary.
5. Before securing fireplace to prepared
framing, the ember protector (provided)
must be placed between the hearth ex-
tension (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 protector (not supplied) must
be fabricated to fit your required platform
height. The ember protector should ex-
tend under fireplace a minimum of 1
The ember protector should be made of
galvanized sheet metal (28 gauge mini-
mum) to prevent corrosion.
6. Using screws or nails, secure fireplace to
framing through flanges located on sides
of fireplace.
DRAIN PAN (DP36)
For outdoor installations, the fireplace enclo-
sure must allow for adequate drainage and
fresh air ventilation. It is recommended that
a sealed, corrosion resistant catch pan with
provision for drainage be installed under the
fireplace within the fireplace enclosure (see
Accessories on page 20).

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. Fabricate a hearth
extension using a material which meets the
following specifications: a layer of noncom-
bustible, inorganic material having a thermal
conductivity of K=0.84 BTU IN/FT, HR. F (or
less) at 1" thick. For example, 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
127020-01A
FIREPLACE INSTALLATION
Continued
/
1
www.SuperiorFireplaces.US.com
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 the hearth extension from
shifting and seal gap between the fireplace
frame and hearth extension with a noncom-
bustible material (see Figure 3).
WARNING: Hearth extension
is to be installed only as shown
".
2
in Figure 3.
Fireplace Front
Ember Protector
Fireplace Front
Raised Hearth
Ember Protector
Fireplace Front
Elevated
Ember Protector
Figure 3 - Hearth Extension
MANTELS
A mantel may be installed if desired (see
Figure 4. page 7). Woodwork such as wood
trims, mantels or any other combustible ma-
terial projecting from the front face must not
be placed within 12" of the fireplace opening.
Combustible materials above 12" and project-
ing more than 1
be placed less than 15" from the top opening
of the fireplace (NFPA STD 211, Sec. 7-3.3.3).
Mantels or any other combustible material
also may come up to the side edge of the
black metal face of the fireplace just as long
as the projection from the front face fall within
the limit shown in Figure 4.
Seal Gap
Seal Gap
/ " from the fireplace must not
1
2
Hearth
Extension
5