Carrier ZS Pro-F - CO2 Sensor

CO2 sensor
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Installation Guide All rights reserved
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Part #33ZCSPTCO2LCD-01 (Display model)
Part #33ZCSPTCO2-01 (No display)
Wall-mount or duct-mount
Duct installation requires an Aspirator Box (Part #33ZCASPCO2) to house the CO2 sensor.
A CO2 sensor monitors carbon dioxide levels. As CO2 levels increase, the controller adjusts the outside air dampers
to increase ventilation and improve indoor air quality. These sensors monitor temperature using a 10K thermistor,
but are not capable of occupancy override.
The figure below shows ventilation rates for various CO2 setpoints when outside air with a typical CO2 level of 350
ppm is used.
20 CFM/person
5 CFM/person
500 700 900 1 100 1300 1500 1700 1900 2100 2300 2500
80
60
40
20
0
CO
2
Concentration (PPM)
Airflow per pe
rson
Outside air (CFM)
NOTES
• The sensor has a 4–20 mA output that is converted to 0–5 Vdc by a 250 Ohm, 1/4 watt, 2% tolerance
resistor connected across the zone controller's CO2 input terminals.
• Do not use a relative humidity sensor and CO2 sensor on the same zone controller.
CO2 sensor
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