Wiring Guide

11 of 12 © 2008 W 161 - 12/08
Testing the Sensor
To test the sensor, the actual temperature at the sensor location must be
measured.
Use a good quality digital thermometer with a surface temperature probe for
ease of use and accuracy. Where a digital thermometer is not available, place
a spare sensor alongside the one to be tested and compare the readings.
1. Remove the front cover from the setpoint control.
2. Disconnect the wires from the sensor.
3. Test the sensor’s resistance according to the instructions in the sensor Data
Brochure D 070, D 074 or D 079.
4. Reconnect the wires.
5. Install the front cover on the setpoint control.
Testing the tN4 Network
To test the tN4 Network, check the wires for continuity.
1. Remove the front cover from the setpoint control.
2. Disconnect the two wires (tN4 and C) at one end and connect them together.
3. Go to the other end of the wires and disconnect them.
4. Using an electrical test meter, check for continuity.
5. Reconnect the wires.
6. Install the front cover on the setpoint control.