1. Introduzione
The FIRST ALERT BRK Model CO250 is a single-station carbon monoxide (CO) alarm designed to provide early warning of the presence of carbon monoxide gas. This battery-operated detector is suitable for residential and institutional applications, including sleeping rooms in hospitals, hotels, motels, dormitories, and other multi-family dwellings. It features an electrochemical CO sensor, an 85dB horn, a full-function test switch, and a red LED indicator for power and alarm status.
Carbon monoxide is an invisible, odorless, and tasteless gas that can be deadly. Sources of CO can include:
- Furnaces and water heaters
- Cucine e forni a gas
- Fireplaces and chimneys
- Asciugatrici per vestiti
- Automobile exhaust from attached garages
This alarm is designed to meet UL2034, NFPA 720, and NFPA 101 standards.

First Alert: Protecting Homes & Families Since 1958.
2. Configurazione e installazione
2.1 Disimballaggio e ispezione iniziale
Carefully remove the carbon monoxide alarm from its packaging. Inspect the unit for any signs of damage. Ensure all included components, such as mounting anchors and screws, are present.
2.2 Installazione della batteria
The CO250B model includes a 9V alkaline battery. To install or replace the battery:
- Open the hinged cover of the alarm. This can be done even when the unit is mounted.
- Connect the 9V battery to the battery connector.
- Place the battery into its compartment. The cover is designed to resist closing if the battery is missing, ensuring proper installation.
- Close the hinged cover until it clicks securely.

Posteriore view of the CO250 alarm showing the battery compartment and mounting points.
2.3 Posizionamento consigliato
For optimal protection, install carbon monoxide alarms on every level of your home and in every bedroom. Carbon monoxide is slightly lighter than air and mixes with warm air, so it's best to install the alarm on a wall or ceiling.
- Montaggio a parete: Place the alarm at least 6 inches (15 cm) from the ceiling and at least 6 inches (15 cm) from any adjacent walls.
- Montaggio a soffitto: Place the alarm at least 4 inches (10 cm) from any wall.
- Avoid placing the alarm near windows, doors, or vents where drafts could interfere with its operation.
- Do not install in areas with extreme temperatures (below 40°F or above 100°F).

Recommended placement of carbon monoxide alarms on every level and in every bedroom.
2.4 Montaggio dell'allarme
The CO250 alarm is designed for wall or ceiling mounting and includes necessary anchors and screws.
- Mark the desired mounting location on the wall or ceiling.
- Drill two pilot holes at the marked locations.
- Insert the plastic anchors into the pilot holes.
- Align the alarm's mounting slots with the anchors and secure it with the provided screws. Ensure the screws are not overtightened, allowing the alarm to slide into place.
- Once mounted, the tamper-resistant locking pin can be engaged to prevent unauthorized battery removal.

Davanti view of the CO250 alarm with included mounting hardware.
2.5 Test iniziale
After installation, press and hold the 'TEST/SILENCE' button on the front of the alarm until the alarm sounds. This confirms the unit is functioning correctly.
3. Istruzioni per l'uso
3.1 Funzionamento normale
During normal operation, the red LED light will flash periodically to indicate the unit is powered and monitoring for carbon monoxide.
3.2 segnali di allarme
The CO250 alarm provides distinct signals for different conditions:
- Allarme CO: Four beeps, pause, four beeps, pause. This indicates the presence of carbon monoxide.
- Segnale acustico di batteria scarica: One chirp per minute. This indicates the 9V battery needs to be replaced.
- Malfunction/End-of-Life: Three chirps per minute. This indicates a unit malfunction or that the alarm has reached its end-of-life and needs replacement.
3.3 Silence Features
The alarm features two silence functions:
- Silenzio batteria scarica: Temporarily silence the low battery chirp for up to eight hours by pressing the 'TEST/SILENCE' button. This allows time to replace the battery without constant chirping.
- Silenziamento allarme: Silence a CO alarm for several minutes by pressing the 'TEST/SILENCE' button. This is useful for nuisance alarms, but always ensure the area is clear of CO before silencing.
3.4 What to Do in Case of an Alarm
Se suona l'allarme monossido di carbonio:
- Move immediately to fresh air outdoors or open doors/windows.
- Effettuare un conteggio per verificare che siano presenti tutti i presenti.
- Call 911 or your emergency services.
- Do not re-enter the premises until the emergency services have cleared the area and the alarm has stopped.

Ensure alarms are installed on every level and in every bedroom for comprehensive protection.
3.5 Prodotto ufficiale finitoview
Guarda questo video per una panoramica generaleview of First Alert Carbon Monoxide Alarms and their importance in home safety.
Video: First Alert Carbon Monoxide Alarms - General information on CO alarms and their placement.
4. Manutenzione
4.1 Test regolari
Test your carbon monoxide alarm regularly, at least once a week, by pressing the 'TEST/SILENCE' button. This ensures the electronic circuitry, alarm, and battery are working.

Regularly test your CO alarms to ensure proper function.
4.2 Sostituzione della batteria
Replace the 9V battery when the alarm emits a low battery chirp (one chirp per minute). It is recommended to replace batteries every six months, even if the low battery chirp has not sounded, to ensure continuous protection.
4.3 Pulizia dell'allarme
Clean your carbon monoxide alarm regularly to prevent dust and debris from interfering with its operation. Gently vacuum or use clean compressed air to remove accumulated dust monthly. Never use water, cleaners, or solvents, as these can damage the unit.
4.4 Segnalazione di fine vita
The alarm has a limited lifespan. When the unit reaches its end-of-life, it will emit three chirps per minute. This indicates that the alarm needs to be replaced immediately. The CO250 has a 7-year limited warranty, and it is recommended to replace the unit after 7 years from the date of manufacture.

Replace alarms at least every 10 years, or sooner if an end-of-life signal is given.
5. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Alarm sounds (4 beeps) | Rilevato monossido di carbonio. | Evacuate immediately, call 911. Do not re-enter until cleared. |
| One chirp per minute | Batteria scarica. | Replace the 9V battery. Use the silence feature for up to 8 hours if needed. |
| Three chirps per minute | Malfunction or End-of-Life. | Replace the alarm unit immediately. |
| Falsi allarmi | High humidity, extreme temperatures, or improper placement. | Relocate the alarm if necessary. Ensure proper ventilation. Clean the alarm. |
| L'allarme non suona durante il test | Dead battery or unit malfunction. | Replace battery. If still no sound, replace the unit. |
6. Specifiche
| Caratteristica | Dettaglio |
|---|---|
| Numero di modello | CO250B |
| Fonte di alimentazione | 9V Alkaline Battery (included) |
| Tipo di sensore | Elettrochimico |
| Livello sonoro dell'allarme | 85 decibel |
| Dimensioni del prodotto | 1.6"P x 4.25"L x 4.25"A |
| Peso dell'articolo | 6.24 once |
| Colore | Bianco |
| Tipo di montaggio | Plate Mount (Wall or Ceiling) |
| Garanzia | Garanzia limitata di 7 anno |
| Certificazioni | UL2034, NFPA 720, NFPA 101 |
7. Garanzia e supporto
7.1 Informazioni sulla garanzia
The FIRST ALERT BRK CO250 Carbon Monoxide Alarm comes with a Garanzia limitata di 7 anno. This warranty covers defects in material and workmanship under normal use and service from the date of purchase. For specific terms and conditions, please refer to the warranty documentation included with your product or contact customer support.
7.2 Assistenza clienti
For technical assistance, warranty claims, or general inquiries, please contact:
- Produttore: BRK Brands, Inc.
- Indirizzo: 3901 Jean Drive, El Paso, TX 79936 USA
- Il team del servizio clienti: (800) 323-9005
- Websito: www.firstalert.com
- Websito: www.brkelectronics.com