Wiring An Outdoor Air Quality Sensor - Carrier RTU Open v3 Installation And Startup Manual

Installing the RTU Open

Wiring an outdoor air quality sensor

Part #33ZCSPTCO2LCD-01 (Display model)
Part #33ZCSPTCO2-01 (No display)
An outdoor air quality (OAQ) sensor monitors outside air carbon dioxide levels. The RTU Open uses this
information, in conjunction with a CO
OAQ sensor is typically duct-mounted in the outside air stream. Duct installation requires an Aspirator Box
Accessory (Part #33ZCASPCO2).
The sensor has a range of 0–2000 ppm and a linear 4-20 mA output. The CO
exceed what is available at J4 - 1 and 4. Provide a dedicated 24 Vac transformer or DC power supply.
Wiring specifications
Cable from sensor to controller:
Maximum length:
To wire the OAQ sensor to the controller
1
Wire the sensor to the controller. See appropriate diagram below.
2
Install a field-supplied dedicated 24 Vac transformer or DC power supply.
3
Apply power and verify sensor readings.
Wiring diagram for #33ZCSPTCO2-01:
NOTE Sensor may be terminated at Input 1 or 2.
RTU Open v3
Installation and Start-up Guide
sensor, to adjust the outside air dampers to provide proper ventilation. An
2
If <100 ft (30.5 meters)
If >100 ft (30.5 meters)
500 feet (152 meters)
32
sensor's power requirements
2
22 AWG, unshielded
22 AWG, shielded
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