How to Operate a Nighthawk Carbon Monoxide Alarm

Written by mary lougee
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How to Operate a Nighthawk Carbon Monoxide Alarm
(Hemera Technologies/ Images)

Carbon monoxide emits from a slow smouldering fire as well as from leaking gas appliances. Stoves and heaters may leak this harmful gas when they need replacement fittings or the fittings are loose. The Nighthawk carbon monoxide alarm monitors the air continuously and displays the parts per million of the gas detected in a home on a digital display. A rise in the readout alerts you to a problem and helps you to make repairs early, before you and your family are affected by harmful fumes.

Skill level:
Moderately Easy

Things you need

  • 9-volt battery

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  1. 1

    Lay the alarm on a flat surface with the back facing up. Press the battery door lock inward and swing the door open. Pull the battery connector slightly out of the compartment. Snap a 9-volt battery into the connector and place it in the compartment with the smallest sides facing up and down. Close the battery door. There is an audible click when the door locks.

  2. 2

    Set the alarm on a table or flat surface near bedrooms. Plug the power cord into an electrical socket. There will be either a red flashing dot or three number eights flashing on the digital display to show the unit is receiving power and warming up. In 20 seconds, the display will read zero.

  3. 3

    Press and release the "Test/Reset" button. There will be 4 quick beeps in 15 seconds then 5 seconds of silence. The alarm will sound 4 more quick beeps. This shows that the alarm is set and working. Press the "Test/Reset" button to turn the alarm off and reset it after it sounds.

  4. 4

    Press the "Peak Level" button to display the highest reading of carbon monoxide in a home.

Tips and warnings

  • Have someone go into each bedroom and listen for the alarm. Carbon monoxide alarms need to be heard by the occupants of each bedroom to wake them at night in the case of an emergency.
  • When the electricity goes out the alarm will work on the back up battery source.
  • Press and release the "Test/Reset" button once a month to ensure the alarm is working.
  • Install one carbon monoxide alarm on each level of a home to protect the entire house.

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