Orion System VCC-X Controller - Manual (Page 27)

VCC-X Controller Technical Guide
VCC-X CONTROLLER WIRING
27
Return Air Temperature Sensor Wiring
Return Air Temperature Sensor
The OE231 Return Air Temperature Sensor must be wired as shown
for proper operation. The Return Air Temperature Sensor is a 10K
Type III thermistor sensor. The Return Air Temperature Sensor
should be mounted in the return air duct. If the system has a Zoning
Bypass Damper installed, be sure the return air sensor is located
upstream of the bypass duct connection. See Figure 13 below for
details.
Mount In HVAC
Unit Return
Air Duct
OE231 Return Air Temperature Sensor
AI4
GND
VCC-X Controller
Figure 13: OE231 – Return Air Temperature Sensor Wiring