08/00
Carbon Monoxide Detector and Controller
CM-21A
Low maintenance, no periodic calibration needed
SPDT fan relay switches 5 amps
Automatic ventilation controller
Dual relays: fan (SPDT) & alarm (N.O.)
Lights reflect system status
Micro computer controlled
Long life (7 to 10 years) Solid state sensor
••
CM-21A
is very specific to carbon monoxide (CO), avoids nuisance alarms.
•
CM-21A
provides CO detection and automatic exhaust fan control for automotive
maintenance facilities, enclosed parking garages, warehouses with forklifts, etc.
•
CM-21A
meets the requirements of the Uniform Building Code for enclosed garages.
•
CM-21A
Meets or exceeds UL 2034 standard and OSHA standards for CO exposure.
•
Fan relay activates at 35 ppm of CO averaged over 5 minutes. 25 ppm is selectable.
•
Alarm relay activates at 100 ppm of CO after 30 minutes or 200 ppm after 10 minutes.
•
5 amp SPDT fan relay controls starters of exhaust fans.
•
1/2 amp N.O. alarm relay connects to warning devices or control panels.
•
CM-21A
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: 7 each #20 wires, 6 inches long
Mounting box: (not included) 4x4 electric
Fan relay: 5 amp, 240 VAC, pilot duty, SPDT
Fan relay actuation: 35 or 25 ppm CO after 5 min.
Alarm relay: 0.5 amp 200 V, 10 VA
Alarm relay actuation: 100 ppm CO after 30 min.
200 ppm CO after 10
min.
Operating Environ: 0 to 125 F, 10 to 90 % RH
Repeatability:
±
10% at 50 ppm calibration point
Linearity:
±
10%
Carbon monoxide exposure: ppm CO vs time
200 ppm
CO
100 ppm
CO
50 ppm
CO
35 ppm
CO
1
CM-21A
Fan Relay
5 min.
5 min.
5 min.
5 min.
CM-21A
Alarm Relay
10 min.
30 min.
none
none
UL 2034 Std.
35 min.
90 min.
no std.
no std.
OSHA Std.
no std.
no std.
8 hr TWA no std.
UBC Std.
60 min.
no std.
8 hr TWA no std.
1. This response is jumper-selectable at 25 ppm; see
CM-21A Operating and Installation Instructions.
Manufactured By: Distributed By:
