Aprilaire 8570 installation instructions Mount the indoor temperature sensor

(8) OPTIONAL – INSTALL AN APRILAIRE MODEL 8051 INDOOR FLUSH MOUNT TEMPERATURE SENSOR

1. Mount the indoor temperature sensor.

•Locate the sensor as you would locate a thermostat.

•Maximum wire length from sensor to thermostat is 300 feet.

•Follow the installation instructions provided with the sensor.

2. Run a 2-wire cable from the sensor to the thermostat.

CAUTION Do not run the wire along

side line voltage (120 VAC) or higher lines as this can cause erratic readings.

3.Take a resistance measurement before connecting to the IDS and CIR GND terminals to verify the sensor is properly installed.

•Use an ohmmeter to measure the resistance (kΩ) of the sensor. The resistance reading will depend on the indoor temperature (see table from OUTDOOR SENSOR installation section on page 17).

4.Wire the sensor to the thermostat (see Figure 9).

• Strip 1/4" of insulation from the two sensor wires.

•Connect the sensor wires to the IDS and CIR GND terminals of the thermostat. The wiring is not polarity sensitive, so either wire can be connected to either thermostat terminal.

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