Heating Film; Measuring Ohm's - Everwarm CHK-15-120 Installation Manual

TESTING THE CONNECTION AND HEATING FILM;
Measure the ohms (resistance) by connecting the red and black wires from
the "cold lead" using a volt meter. Compare this measured value to the
"calculated" OHMs in Step #2. This measurement should be done with film
at room temperature as temperature affects the resistance reading.
The integrity of the installation can be tested simply by measuring the
resistance of the red and black cold lead wires prior to running the cold leads
up through the conduit to the wall junction box. The following simple formula
will provide you the CALCULATED RESISTANCE for the Heating Film
installation. These calculations are based upon an average installed product
temperature. These values will fluctuate +/- 20% based upon the ambient
temperature in the environment in which the product is operating.
NOTE: TO AVOID ELECTRICAL SHOCK, YOU MUST NOT CONNECT THE
THERMOSTAT AND/OR A SLAVE UNIT TO THE COLD LEADS UNTIL THE
TAPING PROCEDURE HAS BEEN COMPLETED (SEE NEXT STEP).
The following formulas are voltage specific and are based on the linear length
of the installed film. The value "R" represents the calculated resistance
(ohms). The value "L" represents the Total linear length of Heating Film.
FOR 120 VOLT INSTALLATIONS, USE THIS FORMULA:
Example: A typical 10' X 10' (100 sq-ft) room will have approximately
three sheets, for a total of 30 linear feet of Heating Film. Divide 218 by
30, yielding a calculated ohms reading of 7.27.
FOR 240 VOLT INSTALLATIONS, USE THIS FORMULA:
Example: A typical 10' X 10' (100 sq-ft) room will have approximately three
sheets, for a total of 30 linear feet of Heating Film. Divide 872 by 30,
yielding a calculated ohms reading of 29.07.
1 linear foot of Heating Film = 3.38 square feet of Heating Film. The linear
foot calculation uses the full width (40.6 inches) of EverWarm Film. If a
sheet is cut in half (20.30 inches), along the center white strip cut line, then
the "linear feet" is half the length.
S E C T I O N 5
1
PAGE 28
MEASURING OHMS
218
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R =
L
872
___
R =
L
EverWarm Radiant Floors