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GS-2CDD02K Series
Carbon Dioxide Transmitter
Product Description
This document describes the hardware installation procedures for the GS-2CDD02K Series duct carbon dioxide gas detectors.
The GS-2CDD02K CO
transmitter uses Infrared Technology to monitor CO
2
Outputs a linear 4-20 mA or 0-5/0-10 Vdc signal. Options include a control relay and a resistive temperature sensor. Features include
a back-lit LCD and a user menu for easy installation.
General Installation Requirements
For proper installation and subsequent operation of each device, pay special attention to the following recommendations:
-
Upon unpacking the product, inspect the contents of the carton for shipping damages. Do not install damaged device.
-
Avoid areas where corroding, deteriorating or explosive vapors, fumes or gases may be present.
-
Ensure that all equipment is installed according to local, regional, and national regulations.
Personal injury or loss of life may occur if you do not follow a procedure as specified.
Equipment damage or loss of data may occur if you do not follow a procedure as specified.
Do not use in an explosive or hazardous environment, with combustible or flammable gases, as a safety or emergency
stop device or in any other application where failure of the product could result in personal injury.
Take reasonable precautions to prevent electrostatic discharges to the controller when installing, servicing or operating
the controller. Discharge accumulated static electricity by touching one's hand to a well-grounded object before working
with the controller.
NOTE: This CO
sensor incorporates a Self Calibration feature to correct CO
2
applications where the CO
will be exposed to fresh air (400 ppm) at least one hour per day. If the monitored space is occupied 24
2
hours or consistently maintains higher or lower levels of CO
will be required. If the self calibration is disabled at installation time without allowing for 7 day auto calibration cycle, then a manual
Calibration should be performed to ensure accuracy of the device.
H a r d w a r e I n s t a l l a t i o n G u i d e
Figure 1: GS-2CDD02K Carbon Dioxide Transmitter
, it is recommended that this feature be turned off, but yearly calibration
2
levels up to 2000 ppm (adjustable to 10,000 ppm) and
2
sensor drift. This feature is recommended for
2
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Summary of Contents for Distech Controls GS-2CDD02K Series
- Page 1 Carbon Dioxide Transmitter Figure 1: GS-2CDD02K Carbon Dioxide Transmitter Product Description This document describes the hardware installation procedures for the GS-2CDD02K Series duct carbon dioxide gas detectors. The GS-2CDD02K CO transmitter uses Infrared Technology to monitor CO levels up to 2000 ppm (adjustable to 10,000 ppm) and outputs a linear 4-20 mA or 0-5/0-10 Vdc signal.
- Page 2 Mounting Instructions The duct type sensor installs on the outside of a return air duct with the sampling tube inserted into the duct. Use the included foam plug to prevent air from entering the enclosure through the conduit and causing an incorrect reading. Mount the sensor in an easily accessible location in a straight section of duct at least five feet from corners or other items that may cause disturbances in the air flow.
- Page 3 Figure 4. Insert conduit or cable gland Two security screws are provided which can be installed to help secure the cover once settings and wiring connections are complete. See Figure 5. Figure 5. Tighten security screws Wiring Deactivate the power supply until all connections are made to the device to prevent electrical shock or equipment damage. Use 16- 22 AWG shielded wire for all connections (only ground the shield at the controller end) and do not locate the device wires in the same conduit with wiring used to supply inductive loads such as motors.
- Page 4 Figure 7. Typical wiring with 24 Vdc and all options The CO analog output is available on the CO terminal. This signal is switch selectable for either 4-20 mA or voltage output (0-5 / 0- 10 Vdc) and connects to the controller analog input. See Figure 8. Figure 8.
- Page 5 Normal Mode The sensor will begin reading the CO level (and temperature if it is installed), output the correct analog signal and display the values on the LCD. If the relay is installed, the measurements will be compared to the setpoint and appropriate action taken. The keypad is monitored and if the <MENU>...
- Page 6 <MENU> Press to advance to next menu item. Only if Temperature Sensor option installed Temp The Temp Units setting is used to select °C or °F display of temperature. Use <UP> or <DOWN> to select. The selection will also control available setpoint ranges if the setpoint option is installed. Units °C Factory default is °C.
- Page 7 Use <UP> or <DOWN> to change the Relay Delay time within the limits. The delay time may be set Relay from 0 to 9 minutes in 1 minute increments to prevent false alarms. The default is 0 minutes (no Dly 0min delay).
- Page 8 ©, Distech Controls Inc. 2022 All rights reserved. Distech Controls is not responsible for damages or claims arising out of improper or careless installation or handling of its products. Persons using this manual are assumed to be trained HVAC specialist / installers and are responsible for using the correct wiring procedures and maintaining safe working conditions with fail- safe environments.
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