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GS-CDR02K
Room Carbon Dioxide Transmitter
Product Description
This document describes the hardware installation procedures for the GS-CDR02K room carbon dioxide gas detectors.
The room CO
transmitter device uses a highly accurate and reliable nondispersive infrared (NDIR) sensor in an attractive, low profile
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enclosure for room applications to monitor CO
5 Vdc or 0-10 Vdc for the highest versatility, programmable CO
operation for configuration.
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.
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Avoid areas where corroding, deteriorating or explosive vapors, fumes or gases may be present.
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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
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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
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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-CDR02K Carbon Dioxide Transmitter
levels. Standard features include a field selectable output signal of either 4-20 mA, 0-
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measurement span, a backlit alpha-numeric LCD and easy menu
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, it is recommended that this feature be turned off, but yearly calibration
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sensor drift. This feature is recommended for
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Summary of Contents for Distech Controls GS-CDR02K
- Page 1 Figure 1: GS-CDR02K Carbon Dioxide Transmitter Product Description This document describes the hardware installation procedures for the GS-CDR02K room carbon dioxide gas detectors. The room CO transmitter device uses a highly accurate and reliable nondispersive infrared (NDIR) sensor in an attractive, low profile enclosure for room applications to monitor CO levels.
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Page 2: Mounting Instructions
Mounting Instructions The transmitter installs directly on a standard electrical box and should be mounted five feet from the floor of the area to be controlled. Do not mount the sensor near doors, opening windows, supply air diffusers or other known disturbances. Avoid areas where the detector is exposed to vibrations or rapid temperature changes. - Page 3 Wiring Figure 6. GS-CDR02K PCB 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.
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Page 4: Startup Mode
This is a 3-wire sourcing device. Connect the plus DC or the AC voltage hot side to the PWR terminal and the common is connected to the COM terminal. The device is reverse voltage protected and will not operate if connected backwards. It has a half-wave power supply so the supply common is the same as the signal common. -
Page 5: Normal Mode
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. The V Output value controls the analog output voltage span if the PCB switch is set to VOLT. V Output V Output can be set to either 0-5 Vdc or 0-10 Vdc using <UP> or <DOWN>. This setting has no effect if the 0-5 Vdc PCB switch is set to mA.
- Page 7 Temp Low 15.0°C / 59.0°F 5.0 to 40.0°C / 40.0 to 100.0°F 0.5° High 1000 ppm 500 to 9000 ppm 1000 ppm 1000 ppm 500 to 9000 ppm 1000 ppm <MENU> Press to advance to next menu item. The Relay Hysteresis will depend on how the relay is assigned. Units will either be in ppm for CO Relay Hy °C/°F for temperature.
- Page 8 Calibration Calibration with gas requires a field calibration kit with pressure regulator, tubing, sensor adapter and bottle of CO gas. The certified calibration gas is applied directly to the CO sensor to perform a gas calibration. Ensure the regulator knob is turned off and then hand tighten the regulator to the CO gas bottle.
- Page 9 ©, 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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