Macurco CD Series, User Instructions

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Macurco CD-xx H/MC Manual
REV – 1.1 [34-2900-0510-8] 5 | P a g e
2 Use Instructions and Limitations
The Macurco CD-xxH/MC a dual relay Carbon Dioxide (CO
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) detector, controller, and transducer available in low voltage and line
voltage options. The CD-xxH/MC has selectable 4-20 mA output, buzzer and digital display options. It is an electronic detection
system used to measure the concentration of Carbon Dioxide and provide feedback and automatic ventilation control to help
reduce CO
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concentrations in conference rooms, classrooms, meeting halls or similar applications. The CD-xxH/MC is a low-level
meter capable of displaying from 0-5000 ppm (parts per million) of Carbon Dioxide. The CD-xxH/MC is factory calibrated and
100% tested for proper operation.
The CD-xxH uses an automated background calibration program to set the clean air level on a regular basis.
The CD-xxMC has the same setting and features of the CD-xxH with the addition of being able to perform a manual calibration.
The CD-xxMC requires a manual calibration process at a minimum of once per year using the Macurco CD6-FCK calibration kit.
WARNING
Each person using this equipment must read and understand the information in this user manual
before use. Use of this equipment by untrained or unqualified persons or use that is not in
accordance with this user manual, may adversely affect product performance.
2.1 Use For
The CD-xxH/MC provides CO
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detection and automatic ventilation control for conference rooms, classrooms, meeting halls or
similar applications. Carbon dioxide is a colorless, odorless gas that is produced both by people exhaling CO
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as well the burning
of gasoline, coal, oil, and wood. The outdoor concentration of carbon dioxide can vary from 350-450 parts per million (ppm) or
higher in areas with high vehicle traffic or industrial activity. The indoor CO
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level depends upon the number of people present,
how long an area has been occupied, the amount of outdoor fresh air entering the area and other factors. CO
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concentrations
indoors can vary several hundred parts per million in areas with many people present for an extended period and where fresh
air ventilation is limited. Outdoor "fresh" air ventilation is important as it can dilute CO
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levels of the indoor environment. The
amount of fresh air that should be supplied to a room depends on the type of facility and room. Ventilation should keep carbon
dioxide concentrations below 1000 ppm and create indoor air quality conditions that are acceptable to most individuals.
For applications storing or using CO
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tanks, the detector will provide notification in the event of a gas leak. Such applications
include but are not limited to food storage, beverage dispensing, agriculture, fire suppression, medical, etc.
The CD-xxH uses an automated background calibration program to set the clean air level on a regular basis. The CD-xxH will
maintain accuracy if it is exposed to the “clean air reference value” (this reference value is the lowest concentration to wh ich
the sensor is exposed) at least once per week.
The CD-xxMC does not perform automated background calibrations and it is suggested to perform a Manual Calibration on the
unit no less than once per year using the Macurco CD6-FCK calibration kit.
42T
Note:
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This applies when used in typical indoor ambient air. The CD-xxH/MC can be used stand alone, with the Macurco
Detection and Ventilation Control Panel, other 12 VAC or 24 VDC fire/security panels or building automation systems.
WARNING
Use only for monitoring the gas which the sensor and monitor is designed to detect. Failure to do
so may result in exposures to gases not detectable and cause serious injury or death. For proper
use, see supervisor or user manual, or contact Technical Support at 1-844-325-3050.