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2. Run a 2-wire cable from the sensor to the thermostat.
3. Take a resistance measurement before connecting to the
ODT and CIR GND terminals to verify the sensor is
properly installed. Measure the wires at the thermostat to
account for wire splices.
• Use an ohmmeter to measure the resistance (kΩ) of
the sensor. The resistance reading will depend on the
outdoor temperature (see table).
4. Wire the sensor to the thermostat (see Figure 7).
• Strip 1/4" of insulation from the two sensor wires.
• Connect the sensor wires to the ODT and CIR GND
terminals of the thermostat. The wiring is not polarity
sensitive, so either wire can be connected to either
thermostat terminal.
CAUTION
Do not run the wire along side line
voltage (120 VAC) or higher lines as this can cause
erratic readings.
OUTDOOR TEMPERATURE (°F) RESISTANCE (kΩ)
-30 230.6
-20 163.8
-10 117.6
0 85.4
10 62.6
20 46.3
30 34.6
40 26.1
50 19.9
60 15.3
70 11.9
80 9.4
90 7.4
100 5.9