Gas Testing; Testing The Alarm Relays - Macurco CD-6B User Instructions

Macurco CD-6B Manual (Rev-1.0) Eng
The gas cylinder should be replaced when the pressure gauge on the regulator shows 25-psi or less or has reached
its expiration date.
NOTE: For optimum calibration results, it is suggested that the unit be in clean air, green light on, and be in a low
ambient air flow.
NOTE: CD-6B must be tested or calibrated at regular intervals in accordance with the requirements of the National
Fire Protection Association (NFPA) 720 or local code requirements. It is recommended to test or calibrate CD-6B at
least annually.

7.3 Gas Testing

7.3.1 Testing the Alarm Relays

NOTE: The CO concentration required to activate the alarm relays depends on the alarm relay settings.
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1. Connect the 5% vol. cylinder of carbon dioxide to the regulator.
2. Check the pressure gauge on the regulator. If you have 25-psi or less, you will need to replace the gas
canister. Check the expiration date on the cylinder, if it has passed the expiration date the cylinder should be
replaced.
3. Place the Test Hood over the CO
4. The alarm relays should activate according to the settings.
5. With the display function turned "On" and the CO
display will flash between "ALr1 and "current gas reading". The buzzer will sound indicating "Alarm" if the
buzzer is turned "On". With the display function turned off the display does not show the CO
but will show "ALr1" when the Alarm 1 relay is activated.
NOTE: If the Alarm relay fails to operate within 2 minutes, there are four possibilities:
4 2 T
a. The detector has the alarm relay disabled (diS). Set the desired Alarm relay to 1.5% and repeat the
test.
REV – 1.0
Figure 7-1 CD-6B Calibration Connection
sensor. Turn on the regulator to start the gas flow.
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concentration reaching the Alarm 1 Relay setting, the
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concentration
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