KN-COSM-BA - Smoke detector KIDDE - Free user manual and instructions
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| Product Type | Combination Smoke and Carbon Monoxide Alarm |
| Dimensions | 5.6 x 5.6 x 2.0 inches (14.2 x 14.2 x 5.1 cm) |
| Weight | 0.5 lbs (227 g) |
| Power Source | 120V AC hardwired with 9V battery backup |
| Sensor Technology | Photoelectric smoke sensor + electrochemical CO sensor |
| Audio Alarm | 85 dB at 10 feet (3 meters) |
| Interconnectable | Yes, up to 24 Kidde devices |
| Alarm Features | Hush (silence) button, Test/Reset button, LED status indicator |
| Battery Backup | 9V alkaline battery (included) |
| Warranty | 10-year limited warranty |
| Maintenance | Test weekly, vacuum monthly to remove dust |
| Safety Certifications | UL Listed, meets NFPA 72 and UL 2034 standards |
| Spare Parts / Replaceability | Replace entire unit every 10 years; battery replaceable |
| General Information | End-of-life warning (chirps after 10 years) |
Frequently Asked Questions - KN-COSM-BA KIDDE
Where should I install the Kidde KN-COSM-BA?
Install on ceilings or high walls in hallways, near bedrooms, and on every level of the home. Avoid damp, dusty, or extremely hot/cold areas.
How do I test the alarm?
Press and hold the Test/Reset button until the alarm sounds. It will produce a loud beep pattern: 4 beeps for smoke, 4 beeps for CO.
How often should I replace the battery?
Replace the 9V backup battery at least once a year, or when the low battery chirp occurs (every 30-60 seconds). Use only alkaline batteries.
What should I do if the alarm goes off falsely?
Press the Hush button to silence the alarm for about 10 minutes. Ventilate the area. If false alarms persist, clean the unit and check for steam, dust, or cooking fumes.
Can I interconnect multiple Kidde alarms?
Yes, you can interconnect up to 24 Kidde alarms. When one unit detects smoke or CO, all interconnected alarms will sound. Follow wiring instructions in the manual.
How long does the alarm last before I need to replace it?
The entire unit should be replaced every 10 years from the date of installation. The end-of-life chirp will remind you.
What does the LED indicator mean?
Green steady = AC power; Red flashing every 30-40s = normal standby. Red flashing rapidly = alarm condition. Yellow or chirping = trouble (low battery, end-of-life, or sensor error).
Can I paint the alarm?
No, painting the alarm can block sensors and cause malfunction. Keep the unit clean and free of paint or stickers.
What is the difference between smoke and CO alarm patterns?
Smoke: 3 loud beeps, pause, repeat. CO: 4 quick beeps, pause, repeat. Voice warning: 'Fire!' or 'Warning! Carbon Monoxide!'
The alarm chirps but no smoke or CO is present. What now?
Check for low battery, dust, or end-of-life. Clean the unit with a vacuum. If chirping continues, replace the battery. If still chirping after 30 days, replace the entire alarm.
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