Full Product Manual
Electrical Considerations
SECTION 4
6
4.1 Floor Sensors and Temperature Control
Floor Sensor (not required for all systems)
Systems using a nSpiration Series control may require a low-voltage floor sensor. Carpet or laminate
flooring manufacturers may require the use of a low-voltage sensor with their floor covering. Check with the
manufacturer for specific recommendations.
This sensor is embedded in the floor and monitors the floor temperature. Check the ohms reading of the
sensor wire before and after installation to make sure it has not changed. Most sensor wires have an ohms
reading of 8,000 to 20,000 Ω, and your ohmmeter must have a 20 kΩ setting for this measurement. The floor
sensor should be centered in between two resistance wires, leaving approximately 1.5 inches on either side
and extending about 6 inches into the heated area. Avoid placing the sensor in an area aected by a draft, a
radiator or other heat source, or the sun.
A second, backup sensor may be installed and can be purchased separately.
The sensor cable should be routed to the thermostat and installed on the wall at a suitable operating height.
Do not allow any other cable to overlap the sensor cable. When heating laminate and carpeted floors (U.S.
only), the maximum temperature setting limit on thermostat should not exceed the flooring manufacturer’s
recommendations.
Route TempZone™ Floor Heating Cable lead wires to a junction box or to the thermostat. Never connect the
floor heating cable to other cables. The thermostat and the cable lead wires must be connected in parallel--
not in series.
Type of Wire Color
120 V Yellow and Black
240 V Red and Black
Floor Sensor Black