Wiring A Duct Air Temperature Sensor - Carrier RTU Open v3 Installation And Startup Manual

Installing the RTU Open
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.

Wiring a duct air temperature sensor

Part #33ZCSENDAT
The RTU Open requires a temperature sensor installed in the supply air stream. The Duct Temperature (DAT)
sensor is generally used when the rooftop unit is NOT equipped with electric heating.
Wiring specifications
Cable from sensor to controller:
Maximum length:
To wire a DAT sensor to the controller
1
Connect the wiring harness (Part#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 v3
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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