Wiring A Supply Air Temperature Sensor - Carrier RTU Open v5 Installation And Startup Manual

Installing the RTU Open
5
Turn on the RTU Open's power.
6
Turn on the Equipment Touch.

Wiring a Supply Air Temperature sensor

Part #33ZCSENSAT
The RTU Open requires a temperature sensor installed in the supply air stream. The Supply Air Temperature (SAT)
sensor is used to properly control the SAT to the maximum and minimum supply air temperature limits, provide
integrated economizer operation, and control the supply fan VFD output, if Fan Control is set to Variable Speed.
Wiring specifications
Cable from sensor to controller:
Maximum length:
To wire the SAT sensor to the controller
1 Connect the wiring harness (OPN-RTUHRN). For details, see To wire inputs and outputs (page 16).
2
Wire the sensor to the wiring harness. See diagram below.
3
Connect to J2 wires 1 and 2.
4
Verify your sensor readings.
RTU Open v5
Installation and Start-up Guide
If <100 ft (30.5 meters)
If >100 ft (30.5 meters)
500 feet (152 meters)
28
22 AWG, unshielded
22 AWG, shielded
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