Description
FEATURES
- NDIR CO2 sensing technology
- 0 to 2,000 ppm range
- ABC logic ensures long-term calibration stability
- 0-10 VDC output
- Small footprint
- Install in ducts or in plenums
- Compatible with all GreenTrol application specific controllers that accept an analog input from a CO2 sensor
- Connects directly to the power input terminals of compatible GreenTrol application controllers
OVERVIEW
The TA-A8031-D is a small footprint, low cost, CO2 sensor designed to be mounted inside of a duct or plenum.
The sensor is typically mounted in the return air duct or plenum near or at the air handler prior to the introduction of outdoor air.
When combined with a GreenTrol outdoor air controller, this CO2 sensor can be used to improve traditional CO2demand control ventilation by using a unique control algorithm that resets the outdoor air setpoint between user defined upper and lower airflow limits (not damper positions) to maintain the space CO2 level. This control method eliminates the under- and overventilation that is prevalent with traditional CO2-DCV.
An even more advanced control method uses the measured airflow rate and CO2 level to estimate the population and calculates the required outdoor airflow, thus meeting the actual requirements of ASHRAE Standard 62.1.
ABC logic ensures years of calibration free operation in applications where the population goes to near zero during unoccupied periods.
FUNCTIONALITY
CO2 Measurement: Provides the CO2 level to the analog input of a GreenTrol application controller that accepts an analog CO2 sensor input
CO2 SENSOR
Technology: Telaire Non Dispersive Infrared (NDIR)
Range: 0 to 2,000 ppm
Required Duct Air Velocity: 0 to 1,500 FPM [7.62 m/s]
Accuracy: ±40 ppm + 3% of reading, @72° F [22°C]
Non-linearity: <1% of full scale
Pressure Dependence: 0.33% of reading per 0.1 in. [2.54 mm] Hg
Response Time: <3 minutes for 90% step change typical
Warmup Time: 2 minutes operational, 10 minutes to achieve maximum accuracy
ANALOG OUTPUT
AO1
Assignment: Linear CO2 output signal
Range: 0-10VDC
ENVIRONMENTAL LIMITS, POWER REQUIREMENTS, DIMENSIONS
Environmental Limits
Temperature: 32 to 122 ⁰F [0 to 50 ⁰C]
Humidity: 5 to 95%
Power Requirement: 24 VAC (22.8 to 26.4 under load) @1.65V-A
Flammability Classification: UL-94V-5
Dimensions: 3.83H x 0.74W x 0.94D in. [18.7 x 29.7 x 23.8 mm]
