User guide

Electrical Considerations
SECTION 4
6
4.1 Floor Sensors and Temperature Control
Floor Sensor (not required for all systems)
SystemsusingaSmartstat™ProgrammableThermostatorEasystat™Thermostatmayrequirealow-voltageoorsensor.
Carpetorlaminateooringmanufacturersmayrequiretheuseofalow-voltagesensorwiththeiroorcovering.Checkwith
themanufacturerforspecicrecommendations.
Thissensorisembeddedintheoorandmonitorstheoor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oor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affected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oors(U.S.only),the
maximumtemperaturesettinglimitonthermostatshouldnotexceedtheooringmanufacturer’srecommendations.
RouteTempZone™FloorHeatingCable(Twin)leadwirestoajunctionboxortothethermostat.Neverconnecttheoor
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