
CAT. CO250LBT
ARCHITECTURAL AND ENGINEERING SPEC
TECHNICAL SPECS
SHIPPING SPECS
INSTALLATION OF ALARM
The carbon monoxide alarm shall be a BRK Model CO250LBT and shall provide at a 
minimum the following features and functions:
1. An electrochemical CO sensor.
2. The unit shall be capable of self restoring.
3. The unit shall have an “End of Life” signal. This signal should be capable of 
temporarily being silenced for up to 2 days. After about 2 days, the signal will 
resume. After about 2-3 weeks the signal cannot be silenced. 
4. Powered by a supervised 9V Lithium battery that will power the alarm for at least 5 
years and a solid state piezo horn rated at 85dB at 10 ft.
5. A visual LED power-on indicator to confirm unit is receiving power or is in alarm.
6. A test/silence button to check all alarm functions and to silence any nuisance 
alarms. In addition, the unit shall have a low battery silence feature to quiet 
the low battery chirp for up to eight hours.
7. A tamper proof mounting bracket that prevents removal of the alarm from the wall 
or ceiling using a tamper proof spanner screw. A tamper proof spanner screwdriver 
bit is to be provided. In addition a tamper resistant locking pin should be provided 
that locks alarm cover to prevent removal battery.
8. The CO sensor is adjusted not to detect CO levels below 30 PPM and will not 
alarm when exposed to constant levels of 30 PPM for 30 days. It will alarm at the 
following levels: 400 PPM CO between 4 and 15 minutes, 150 PPM CO between 10 
and 50 minutes and 70 PPM CO between 60 and 240 minutes.
9. The unit shall be capable of operating between 40°F (4°C) and 100°F (38°C) and 
relative humidity between 10% and 95%.
10. The unit shall contain mounting hardware and shall be listed for wall or ceiling 
mounting.
11. The unit shall at a minimum meet the requirements of UL2034, NFPA 720, NFPA 
101, ICC.
Alarm Dimensions: 5.1”W x 4.38”H x 1.64”D
Weight: 6.3 oz
Operating Voltage: 9V Lithium Battery Powered)
Temperature Range: 40°F (4°C) to 100°F (38°C)
Humidity Range: 10% to 90% relative humidity (RH)
Audio Alarm: 85dB at 10 feet
Test/Silence: Electronically simulates carbon monoxide condition, 
 causing the unit to alarm. Press and hold test/silence 
 button
Alarm Reset: Automatic when CO clears
CO Sensor: Electrochemical
Indicator Lights/Sounds: 
 DC Power: Intermittent Red LED 
 Local Alarm: Audio alarm and rapidly flashing Red LED
Listing: Listed to UL2034 Standard
Individual Carton Dimensions 4.38”L x 1.88”W x 4.57”H 
 Weight 0.50 lbs. 
 Cube 0.02 ft3 
 UPC 0 29054 00952 4 
Master Carton Dimensions 12.63”L x 6.13”W x 5.19”H 
Master Pack 6 
 Weight 3.24 lbs. 
 Cube: 0.23 ft3 
 I2of5: 600 29054 00952 6 
Pallet Information 
 Cases per Layer 30 
 Number of Layers: 8 
 Cases per Pallet: 240 
 Units per Pallet: 1440 
 Cube: 45.1 ft3 
 Weight: 843 lbs.
©2011 BRK Brands, Inc. a Jarden Corporation 
Company (NYSE: JAH)
3901 Liberty Street Road
Aurora, IL 60504-8122
All rights reserved 
First Alert is a registered trademark of the First Alert Trust
BRK is a registered trademark of BRK Brands, Inc.
CM3117
brkelectronics.com
Installation of this CO alarm must conform to NFPA 720. Always check your local 
building codes. Follow all instructions for placement as outlined in the user’s manual in 
sections titled “Recommended Locations for CO Alarms” and “Locations to Avoid for CO 
Alarms”.
THE PARTS OF THIS CO ALARM
1. “Open Here”
2. “No Battery” tab
3. Test/Silence button 
4. CO alarm base
5. Standard screw mounting slots
6. Install 9V battery here
7. Locking pin slot
8. Locking pin: Remove and insert in 7
9. Tamper proof bracket
10.Tamper proof ring
11.Tamper proof spanner screw
12.Tamper proof spanner bit
MOUNTING
BRACKET & RING
TOP VIEW
4.4”
SIDE VIEW
5.1”
1.6”
 
1
2
3
4
5
6
7
12
11
8
7
Tamper Proof BracketTamper Proof Locking Ring
Alarm Secured with 
Tamper Proof Bracket
10
Tamper Proof Screw 
Mounting Hole 9
Tamper Proof Screw 
Mounting Hole
Standard Screw 
Mounting Holes
CO
4.4”
3
Tamper Proof
Spanner Screw & Bit