Installing the thermistor
1. Install the thermistor at the evaporator outlet near to the access fitting using a zip tie. Position the
thermistor at either the 10 o’clock or 2 o’clock position only. Clean the surface of the tubing with
sandpaper, if needed. See Figure 14.
Figure 14: Thermistor installation at evaporator outlet
Figure 15: Insulation secured to the thermistor
2. Apply thermal paste between the thermistor and the evaporator outlet to increase thermal transfer
between the evaporator outlet and the thermistor.
3. Ensure that the thermistor wire is not tied down to the tubing. The zip tie should be secured around
the thermistor body only. See Figure 14. Do not tie the thermistor wire leads to the refrigeration
tubing.
4. Wrap the thermistor with insulation material and secure the insulation in place using a zip tie. See
Wiring
Notice
Risk of Property Damage
Do not apply power to the system before checking all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to the equipment.
Quick Response Expansion Valve and Precision Superheat Controller Installation Guide
10
