Kidde KN-COSM-B-RF User Manual page 24

Battery Door Closed
Installing Batteries
Batteries were not installed at the factory and must be installed
for the unit to operate.
Install the three AA batteries in the back of the smoke/CO alarm.
• Open battery door by lifting up on the lip at the bottom edge
of the alarm.
• The battery polarity markings on the bottom of the battery
compartment must be adhered to.
• Batteries must be installed in the sequence shown above.
If batteries seem difficult to install, they're not being installed
in the proper sequence.
• Smoke/CO alarm will not engage the attachment stud (see
page 29) unless all three batteries are installed and the
battery door is closed. Removal of any or all batteries will
render the smoke/CO alarm inoperative!
• After the batteries are correctly installed the unit will beep
once, the red LED will flash, "Push Test Button" will be
played. The green LED will flash immediately after power
is applied, and then will flash every 30 seconds to display
normal operation.
CAUTION: Your smoke/CO alarm is sealed and the
cover is NOT removable!
24 Installation Guide
3rd
2nd
1st
Battery Door Open