Product Overview

CD-W00-x0-2 Series Wall Mount CO
2
and Temperature Transmitters Product Bulletin
2
Product Overview
This multifunctional CO
2
and temperature transmitter
uses an advanced CO
2
sensing technology. The
second-generation, silicon-based CARBOCAP®
sensor provides stability and reliability.
The CARBOCAP sensor operates in accordance with
the single-beam, dual-wavelength method. This
patented sensor has unique reference measurement
capabilities, offering excellent stability over five years in
typical HVAC applications.
The CO
2
transmitter is factory-set to measure
CO
2
levels up to 2,000 ppm. It requires a Class 2,
24 VAC/VDC power source and generates an output
signal proportional to the CO
2
level detected. One
simple wire to a screw terminal on the Printed Circuit
Board (PCB) selects the analog output signal from the
following options:
• 0 to 10 V
• 4 to 20 mA
The multifunctional device also features a connection
to an internal platinum temperature sensor
(Pt1000 RTD). This temperature sensor has a range of
32 to 122°F, which allows for accurate temperature
measurement in many common HVAC applications.
Calibration
The CD-W00-x0-2 CO
2
and Temperature Transmitter
is calibrated using certified gases for the following:
• output signal (0 to 10 V) proportional to CO
2
concentration (0 to 2,000 ppm)
• altitude range of 0 to 2,000 ft (0 to 600 m) above
sea level without compensation
Second-Generation CARBOCAP Technology
Johnson Controls is licensed to integrate the silicon-
based CARBOCAP® sensor into HVAC or Building
Automation Systems. Integrating this sensor delivers
several advantages: high accuracy, excellent stability,
negligible temperature dependence, and ease of
installation. Due to the long-term stability, maintenance
costs are reduced.
The structure of the diffusion-aspirated, single-beam
dual-wavelength sensor is remarkably simple. It
consists of an Infrared (IR) source, a sample cell, a
tunable-interference filter, and an IR detector. The
tunable-interference filter enables measurements at
two wavelengths. As a result, references are measured
accurately, without the typically broad tolerances
inherent in dual-beam sensors.
Dust, water vapor, and most chemicals do not affect the
measurement accuracy of the sensor. No special
software compensation patches are necessary, and the
device requires no maintenance.
Versatile Transmitter
Designed for mounting directly to a wallboard surface,
the CD-W00-x0-2 Series Wall Mount CO
2
and
Temperature Transmitter generates considerable
savings in installation, operation, and maintenance with
no recalibration costs.
Energy Efficiency
The CO
2
and temperature transmitter, when used with
BAS/Economizer controllers (featuring DCV
strategies), can generate energy savings up to:
• 20 to 40% in office buildings
• 20 to 60% in restaurants/light retail facilities
• 10 to 70% in educational/business settings
Repair Information
If the CD-W00-x0-2 Series Wall Mount CO
2
and
Temperature Transmitters fail to operate within their
specifications, replace the units. For a replacement
CO
2
and temperature transmitter, contact the nearest
Johnson Controls representative.
Altitude Compensation
This device is intended for an altitude range of
0 to 2,000 ft (0 to 600 m) without compensation. To
compensate for higher altitudes, refer to the
CD-W00-x0-2 Series Wall Mount CO
2
and
Temperature Transmitters Installation Instructions (Part
No. 24-10864-11) for additional information.
IMPORTANT: The CD-W00-x0-2 Series Wall
Mount CO
2
and Temperature Transmitters are
intended to provide an input to equipment under
normal operating conditions. Where failure or
malfunction of the transmitter could lead to personal
injury or property damage to the controlled
equipment or other property, additional precautions
must be designed into the control system.
Incorporate and maintain other devices, such as
supervisory or alarm systems or safety or limit
controls, intended to warn of or protect against
failure or malfunction of the transmitter.