Floor Sensor Wiring
The Floor Sensor (A3040079) comes
with 10' (3 m) of cable. If a longer
length is required, splice 24 AWG or
larger wire onto the two wires from the
sensor. Properly solder and protect the
splices in an accessible junction box.
Follow the sensor testing instructions
in this manual and then connect the
wires to the thermostat.
Floor Sensor Testing
Use a good quality test meter capable
of measuring up to 5,000 kΩ (1 kΩ =
1000Ω) to measure the sensor resis-
tance. In addition, measure the actual
temperature with either a good quality
digital thermometer, or if a thermometer
is not available, place a second sensor
alongside the one to be tested and
compare the readings.
First measure the room temperature
using the thermometer. Disconnect
the S1 or S2 and Com wires from the
thermostat. Using an electrical meter,
measure the resistance of the S1 or
S2 and Com wires at the thermostat
location. Using the Temperature vs.
Resistance Table below, estimate the
temperature measured by the sensor.
The sensor measurement and
thermometer readings should be close.
If the test meter reads a very high
resistance, there may be a broken wire,
a poor wiring connection or a defective
sensor. If the resistance is very low, the
wiring may be shorted, there may be
moisture in the sensor or the sensor
may be defective. To test for a defective
sensor, measure the resistance directly
at the sensor location. Once the test
has been completed, reconnect the S1
or S2 and Com wires to the thermostat.
Do not apply voltage to the temperature
sensor terminals at any time as damage
to the sensor may result.
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