Ei Electronics Ei 261EN - Manual (Page 21)

Testing with Carbon Monoxide
The unit checks for CO every 4 seconds and as soon as it detects CO it flashes the red light (as per Table
B) to confirm that is detecting CO gas.
Alternatively:
Pressing the test button causes the unit to check for CO - this is the Fast CO Test Mode. This eliminates
the long wait normally required e.g. up to 90 minutes at 55ppm CO and up to 3 minutes at 330ppm CO.
The unit can be tested with CO by using one of the kits that comes with CO either in a glass phial or
aerosol can. Follow the instructions on the kit but be sure to press the test button to speed up the CO
sampling directly after you expose the unit to the CO. It is best if possible to inject the CO gas into the
gas entry holes, see Figure 1. When it senses the CO it will give 3 beeps and the red light will flash as
per table B. It then resets to normal mode. (If unit fails to respond press test button again as gas can take
some seconds to enter sensor).
The Fast CO Test Mode normally does not activate the memory function unless a high level of CO
remains in the sensor for a few minutes. (This can be checked by pressing the test button. If the red light
flashes continuously indicating CO was detected, hold the test button for 20 seconds until the red light
stops flashing as the memory resets).
How to distinguish between CO Alarm and Smoke Alarm Warnings
The CO Alarm has a distinctive on-off sound of 3 pulses, followed by a pause as compared with a typi-
cal Smoke Alarm which has a rapid pulsing sound.
In addition, when your CO Alarm is sounding, the red alarm light in the centre of the cover will be flashing.
Testing both your CO Alarms and Smoke Alarms weekly will help you and your family to clearly
distinguish between them in an emergency.
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B15404-R0-261EN-UC-ENG 31/5/07 2:01 PM Page 21