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3M Macurco CM-21A, User Instructions

The 3M Macurco CM-21A is a state-of-the-art gas detector designed to ensure safety in various environments. Enhance your understanding of this powerful device by accessing its comprehensive User Instructions manual, available for free download at manualshive.com. Safeguard lives today with this essential resource empowering users with knowledge.

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Macurco

™

CM-21A Carbon Monoxide

Detector and Controller

User Instructions for 3M Macurco CM-21A - Low voltage, dual relay Carbon
Monoxide (CO) detector and controller

Important: Keep these User Instructions for reference

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Summary of Contents for Macurco CM-21A

Page 1: ... CM 21A Carbon Monoxide Detector and Controller User Instructions for 3M Macurco CM 21A Low voltage dual relay Carbon Monoxide CO detector and controller Important Keep these User Instructions for reference 1 ...

Page 2: ...A mounts on a standard 4x4 electrical box and becomes cover for the box Supervised system any internal detector problem will cause the fan relay to activate Optional calibration kit is available One screw allows access for calibration Specifications Power 3 watts from 12 to 24 VAC or VDC Current 12 V 0 25 amps 24 V 0 12 amps Shipping Weight 1 pound Size 4 1 2 x 4 x 2 1 8 in Color gray Connections ...

Page 3: ...ve feet above the floor 3 See applicable building code for fan size vs air changes per periods of time 4 Make sure there are air inlets to provide adequate air flow throughout the building Typical multiple CM 21A installation space sensors equally relay red red yel yel blue brn org POWER 12 24V ALARM RELAY SPDT fan RELAY CM 21A coil MAIN FAN POWER exhaust fan RELAY 12 or 24 vdc coil Alarm Control ...

Page 4: ...20 mA analog output based on a 0 200 ppm sensing range The microprocessor controls the heating of the sensor and subsequent reading of the CO level The micro processor compensates for any drift in the sensor over time The microprocessor system includes self diagnostic self restarting and remote failure reporting The output signal will drop below 4 mA if a fault is discovered If power problems caus...

Page 5: ...pm N O N C Warning Relay Factory setting 50 ppm N O N C T3 T2 L2 KCO A 24 VAC 4 20 mA SIG OUT L1 L2 WIRING 50 ppm 50 100 ppm relay settings KCO R only R Relay output carbon monoxide sensor MODEL KCO DESCRIPTION H Hinged cover enclosure KCO R H 50 ppm Example KCO RH 50 ppm Carbon monoxide sensor with relay output and hinged cover enclosure A Analog output carbon monoxide sensor LT Low temperature o...

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