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STEP BY STEP GUIDE TO PROGRAMMING 
THIS ALARM

FOR FIRST TIME AND WHEN CHANGING BATTERIES

Action:

1. Insert batteries (2, AA batteries).

Alarm Will Say:

“Welcome, First Alert Carbon 
Monoxide Alarm.”
“No location programmed” if first
time 
or “[Location, example:
“Basement”] location programmed”
when changing batteries.
“To select location, press and hold
test button now.”

2. Press & Hold Test Button if you

would like to program the location
or change the location of the
Alarm. Release button after Alarm
responds.

“To save location, press and hold test
button after location is heard.” Alarm
will speak list of locations (see
below).

3. After you hear the location of where

you are placing the Alarm, Press &
Hold the Test Button.

“[Location, example: “Basement”]
location saved.”
If no location is chosen: 
“No location saved.”

Your Alarm has now been programmed for the location of your choice.
Available locations:

Basement

Kitchen

Child’s Bedroom

Living Room

Dining Room

Master Bedroom

Family Room

No Location

Guest Bedroom

Office

Hallway

Utility Room

NOTE: Steps 1 through 3 need to be completed within two minutes. If
more than two minutes pass, the Green power LED will stop blinking.
Simply open the battery drawer of the second Alarm and repeat 
steps 1 through 3.

1. Insert the batteries into the battery

drawer of the next Alarm. 
DO NOT CLOSE THE DRAWER.

2. Press and hold the test button and

then close the battery drawer.

3. Once you hear the unit chirp,

release the test button. 
The Green power LED will start 
to blink indicating the ONELINK

®

Alarm is waiting for program data 
from one of the other setup ONELINK

®

Alarms.

4. Press and hold the test button on the first Alarm, until the second Alarm

chirps and its Green power LED stops blinking. Then release the test button.

5. If you have purchased the hardwired battery back-up ONELINK

®

Alarm,

you can now connect the hardwired Alarm by installing the three-wire 
connector on the ceiling to the Alarm.

6. Repeat steps 1-5 for additional ONELINK

®

Alarms.

You have now successfully linked your new ONELINK

®

Alarms. To add

additional Alarms at a later time, follow steps 1 through 5.

ADDING AND LINKING ADDITIONAL ONELINK

®

ALARMS

WHAT YOU WILL SEE AND HEAR WITH THIS ALARM

Under Normal Operations

Voice:

Silent

Horn: Silent
Power LED: Flashes Green once/minute

When You Test the Alarm

Voice: 

“Testing.” Horn: 4 fast beeps, pause, 4 fast beeps;

Voice: “Warning, evacuate carbon monoxide in [Location, example:

“Basement”]. Evacuate.” Pause. “Highest carbon monoxide level
was [CO level example: _0_ ppm]”.

CO LED: Flashes Red in sync with the horn pattern

If Battery Becomes Low or is Missing

Voice:

“Replace battery in [Location, example “Basement”].” 
Repeated every 5 hours

Horn: chirps once a minute
Power LED: Flashes Green On for 2 seconds/Off for 2 seconds. 

Low Battery Latch is now engaged.

If Alarm is Not Operating Properly (MALFUNCTION SIGNAL)

Voice: “Detector error in [Location, example “Basement”], please see 

manual.” Repeated every 5 hours

Horn: Three rapid chirps every minute
CO LED: Flashes approximately once a minute

Alarm Levels of CO are Detected

Horn: 4 fast beeps, pause, 4 fast beeps, pause*
Voice: 
“Warning, evacuate carbon monoxide in [Location, example:

“Basement”]. Evacuate.” Pause. “Highest carbon monoxide level 
was [CO level example: ___ ppm]”.

Horn: 4 beeps, pause, 4 beeps, pause repeating 2 times followed by

Voice Warning above.

CO LED: During Alarm: Flashes Red in sync with the horn pattern. After

Alarm: Flashes Red On for 2 seconds/Off for 2 seconds. CO
Alarm Latch is now engaged.

*NOTE: If unit goes into CO alarm, the regular 4 beeps-brief pause cycle will
repeat for fifteen minutes. After fifteen minutes, the pause will increase to one
minute.

CO Alarm is Silenced

Horn: Off
CO LED: Flashes Red

4

Summary of Contents for ONELINK CO511

Page 1: ...clusive Voice Warning with Location will tell you the preprogrammed location of the initiating unit and danger detected Programmable up to 11 locations ex basement When alarms sounds if programmed for...

Page 2: ...need pencil drill with 3 16 5mm drill bit Phillips screwdriver hammer 1 Hold the mounting bracket against the ceiling or wall so the vertical mounting slot is aligned in the 12 o clock position and t...

Page 3: ...the CO Alarm to the mounting bracket You can choose to use either feature independently or use them both Tools you will need Needle nose pliers Standard flathead screwdriver Both locking features use...

Page 4: ...ton 5 If you have purchased the hardwired battery back up ONELINK Alarm you can now connect the hardwired Alarm by installing the three wire connector on the ceiling to the Alarm 6 Repeat steps 1 5 fo...

Page 5: ...tside of the CO Alarm using your household vacuum s soft brush attachment A can of clean compressed air sold at computer or office supply stores may also be used Follow manufacturer instructions for u...

Page 6: ...ed to alarm before there is an immediate life threat Since you cannot see or smell CO never assume it s not present An exposure to 100 ppm of CO for 20 minutes may not affect average healthy adults bu...

Page 7: ...rms to different locations Add an additional Alarm between the unresponsive Alarms to route the signal around obstructions CO Alarm goes back into alarm 4 minutes after you Silence it CO levels indica...

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