8.Next construct the hearth extension out of
a)The hearth extension must extend 17” in front of the rough framed opening on the ZC20.
b)The hearth extension width must be at least 37 15/16”.
c)The hearth extension must be made of brick 2” thick, a listed “Hearth Extension” or “Floor Protector”, or
a hearth extension made of
ALTERNATE FLOOR PROTECTORS MATERIALS
With the floor protector or hearth extension material specified as one layer of 2” thick brick with a K* factor of 5.0, you may use alternate materials as long as the K* factor (s) is calculated as follows:
Formula: Required thickness = (K of alternate material/K of millboard) X (thickness of millboard)
Example: An alternate inorganic
Required thickness = .9375.0o x 2 inch = 3/8 inch
K Factors of Alternate Materials:
Material | K | Required Thickness |
Ceroform 126 | .21 | 1/8” |
Limestone | 8.0 | 3.2” |
Concrete | 8.0 | 3.2” |
Sandstone | 13.0 | 5.2” |
Marble | 18.0 | 7.2” |
Hearth extension or floor protector thickness above four (4) inches is generally not acceptable due to cost, floor load capacity, and look. The alternate we recommend is using Ceroform No. 126 millboard 1/8” thick minimum and putting any type decorative brick or stone (any thickness) on top of it.
*The K* factor represents the thermal conductivity of a material and is the time rate of heat flow through a homogeneous material under
direction perpendicular to a surface.
9.The next step is the electrical installation. NOTE: An electrician must wire the ZC20 into the home wiring system using No. 15 AWG (with ground wiring) as minimum in accordance with local wiring codes.
CAUTION: Stove is plugged into cabinet receptacle.
A.Remove brass trim.
B.Remove top panel and right side panel.
C.Now an electrician must do the wiring.
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