Wiring A Co2 Sensor - Carrier RTU Open v3 Installation And Startup Manual

Installing the RTU Open
4
Verify your sensor readings.

Wiring a CO2 sensor

Part #33ZCSPTCO2LCD-01 (Display model)
Part #33ZCSPTCO2-01 (No display)
Part #33ZCT55CO2 (No display)
Part #33ZCT56CO2 (No display)
A CO sensor monitors carbon dioxide levels. As CO
2
dampers to increase ventilation and improve indoor air quality. A CO
return air duct. 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 24Vac transformer or DC power supply.
Wiring specifications
Cable from sensor to controller:
Maximum length:
To wire a separate dedicated CO2 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
Wire the sensor to the controller.
RTU Open v3
Installation and Start-up Guide
levels increase, the RTU Open adjusts the outside air
2
sensor can be wall-mounted or mounted in a
2
If <100 ft (30.5 meters)
If >100 ft (30.5 meters)
500 feet (152 meters)
30
sensor's power requirements
2
22 AWG, unshielded
22 AWG, shielded
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