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

Overview

The Johnson Controls CD-WA0-00-2U is a wall-mount room carbon dioxide (CO2) and temperature transmitter engineered for indoor air quality monitoring in commercial and light-industrial HVAC applications. By combining dual-channel CO2 and temperature sensing into a single low-profile enclosure, it simplifies installation, lowers system costs, and supports demand-controlled ventilation (DCV) strategies to optimize fresh air delivery while maximizing energy efficiency.

Features

• Dual-Channel NDIR Technology: Utilizes advanced dual-beam optics to offer long-term calibration stability and effectively compensate for light-source drift.
• Integrated Temperature Sensing: Employs a precision NTC thermistor for simultaneous space temperature measurement without requiring a separate device.
• Field-Selectable Outputs: Provides two analog outputs configurable for either 0 VDC to 5 VDC or 0 VDC to 10 VDC to match various building automation systems.
• Configurable Interface: Designed as a no-display model externally, it contains an internal LCD and keypad for programming and parameter adjustment.
• Energy Optimization: Facilitates DCV strategies that can reduce HVAC energy consumption by 10% to 70% based on actual occupancy.
• Durable Design: Housed in a compact, white ABS/PC enclosure with a NEMA 1 (IP30) rating suitable for commercial interior spaces.

Specifications

• Power Supply: 20 VDC/VAC to 28 VDC/VAC, non-isolated half-wave rectified.
• CO2 Range: 0 ppm to 2,000 ppm default; field-adjustable from 1,000 ppm up to 10,000 ppm.
• CO2 Accuracy: Plus or minus 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: Plus or minus 0.36°F from 32°F to 122°F (plus or minus 0.2°C from 0°C to 50°C).
• Response Time: 20 seconds (T63) for CO2 tracking.
• 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.

Applications

• Commercial office buildings and corporate office environments.
• K-12 schools, university classrooms, and educational institutions.
• Hospital patient rooms, clinics, and healthcare facilities.
• Retail environments, shopping centers, and public spaces.
• Building automation systems and energy management networks implementing demand-controlled ventilation.