CD-WA0-00-2U Johnson Controls Wall Mount CO2 Transmitter

CD-WA0-00-2U Datasheet

Overview

The Johnson Controls CD-WA0-00-2U is a wall-mount room carbon dioxide (CO2) and temperature transmitter designed to monitor indoor air quality. Part of the CD-31x-U and CD-WAx-U Series, this device utilizes advanced dual-channel non-dispersive infrared (NDIR) technology to provide highly accurate and stable CO2 measurements. By integrating CO2 and temperature sensing into a single, low-profile enclosure, it simplifies installation and supports demand-controlled ventilation (DCV) strategies to enhance energy efficiency and occupant comfort.

Features

• Dual-Channel NDIR Sensor: Features the second-generation CARBOCAP design with dual-beam optics to provide superior measurement stability and compensate for light-source drift.
• Integrated Temperature Sensing: Includes a precision NTC thermistor to measure space temperature, eliminating the need for separate sensors.
• Field-Selectable Outputs: Offers versatile output signals including 0 VDC to 5 VDC or 0 VDC to 10 VDC to ensure compatibility with various building automation systems.
• Energy Efficiency: Facilitates DCV strategies, which can potentially reduce energy consumption by 10% to 70%.
• Long-Term Reliability: Designed with a sensor lifespan of over 15 years and a stable infrared reference for minimal maintenance.
• User Interface: While this specific model (CD-WA0-00-2U) does not include a display window, it features an internal LCD and keypad for configuration of operating parameters.
• Durable Design: Housed in a white ABS/PC enclosure with an IP30 (NEMA 1) rating suitable for commercial environments.

Specifications

• Power Supply: 20 VDC/VAC to 28 VDC/VAC, non-isolated half-wave rectified.
• CO2 Measurement Range: 0 ppm to 2,000 ppm (default); field-adjustable up to 10,000 ppm.
• CO2 Accuracy: ±30 ppm + 3% of measured value.
• Temperature Range: Selectable ranges of 32°F to 95°F (0°C to 35°C) or 32°F to 122°F (0°C to 50°C).
• Temperature Accuracy: ±0.36°F @ 32°F to 122°F (±0.2°C @ 0°C to 50°C).
• Response Time: 20 seconds (T63).
• Dimensions: 4.7 in. x 3.3 in. x 1.15 in. (119 mm x 84 mm x 29 mm).
• Operating Conditions: 32°F to 122°F (0°C to 50°C); 5% to 95% RH, non-condensing.
• Mounting: Directly to a wall or a single-gang electrical box.

Applications

The CD-WA0-00-2U is ideal for monitoring and controlling environmental conditions in a variety of commercial and institutional settings, including:

• K-12 schools and university classrooms.
• Hospital patient rooms and healthcare facilities.
• Office buildings and corporate workspaces.
• Retail spaces and shopping centers.
• Any indoor environment utilizing demand-controlled ventilation to optimize air quality and energy usage.