1. Johdanto
This manual provides essential information for the installation, operation, and maintenance of your First Alert 9120B Hardwired Smoke Alarm. This device is designed to provide early warning of smoke and fire hazards in residential environments.
Keskeisiä ominaisuuksia ovat:
- Ionization Sensor: Detects smoke from fast-flaming fires.
- Hardwired with Battery Backup: Ensures continuous operation even during power outages using a 9-volt battery.
- Yhteenliitettävyys: Can be linked with compatible BRK or First Alert alarms, causing all connected alarms to sound when one is triggered.
- 85-Decibel Alarm: Provides a loud alert upon smoke detection.
- Testi/hiljaisuuspainike: Allows for easy testing of alarm functions and silencing of nuisance alarms.
- Latching Alarm Indicator: Identifies the initiating alarm unit after an event.
- Käyttöiän päättymisen signaali: Notifies you when the unit needs replacement.

Image 1.1: First Alert 9120B Hardwired Smoke Alarm. This image shows the front view of the smoke alarm with its test/silence button and speaker grille.
2. Turvallisuustiedot
Please read and understand all instructions before installing and operating this smoke alarm. Keep this manual for future reference.
- Sähköturvallisuus: Installation involves electrical wiring. Ensure power is turned off at the circuit breaker before beginning installation. If you are unsure about electrical wiring, consult a qualified electrician.
- Johdotusten napaisuus: Confirm correct wiring polarity and secure all wire nut connections. A loose neutral (white wire) connection within the home junction box can cause device malfunction.
- Akun varmuuskopiointi: The 9-volt battery backup is crucial for operation during power failures. Ensure a fresh battery is installed and replaced annually.
- Sijoitus: Install smoke alarms on every level of your home and in each bedroom for optimal protection.
- Testaus: Testaa palovaroitin viikoittain varmistaaksesi sen moitteettoman toiminnan.
3. Pakkauksen sisältö
Paketissasi tulee olla seuraavat asiat:
- First Alert 9120B Hardwired Smoke Alarm Unit
- Asennusteline
- Johtosarja
- 9 voltin akku
- Käyttöohje
Note: This product is typically sold in multi-packs (e.g., 6-pack), meaning you will receive multiple sets of the above items.
4. Asennus ja asennus
Follow these steps for proper installation of your hardwired smoke alarm:
- Sammuta virta: Before starting, turn off the power to the circuit where you will be installing the smoke alarm at your main electrical panel.
- Remove Old Alarm (if applicable): If replacing an existing alarm, carefully remove it and its mounting bracket. Disconnect the wiring harness.
- Valmistele johdotus: Connect the new wiring harness to your household wiring. Typically, this involves connecting:
- Black wire (hot) to black wire
- White wire (neutral) to white wire
- Red/Orange wire (interconnect) to red/orange wire (if interconnecting multiple alarms)
- Asenna asennusteline: Secure the universal mounting bracket to the electrical junction box using the provided screws.
- Asenna akku: Open the side-load battery compartment and insert the 9-volt battery, observing the correct polarity. Close the compartment.
- Kiinnitä hälytysyksikkö: Connect the alarm unit to the wiring harness. Align the alarm unit with the mounting bracket and twist clockwise until it locks securely into place.
- Palauta virta: Turn the power back on at the circuit breaker. The alarm should chirp once and the power indicator light should illuminate.
- Testihälytys: Press and hold the Test/Silence button until the alarm sounds. This confirms proper operation.
Suositeltu sijoitus
For optimal safety, follow these placement guidelines:
- Install at least one smoke alarm on every level of your home, including the basement.
- Install a smoke alarm inside every bedroom.
- Install a smoke alarm in the hallway outside of each sleeping area.
- Avoid placing alarms near windows, doors, or forced-air vents where drafts could interfere with smoke detection.
- Keep alarms away from cooking appliances to prevent nuisance alarms.

Image 4.1: Recommended Smoke Alarm Placement. This diagram illustrates ideal locations for smoke alarms, carbon monoxide alarms, and fire extinguishers throughout a typical home, including bedrooms, hallways, living room, kitchen, basement, and garage.
5. Käyttöohjeet
Hälytyksen testaaminen
Test your smoke alarm weekly to ensure it is functioning correctly:
- Press and hold the Test/Silence button firmly for a few seconds.
- The alarm will sound a loud, pulsating horn. This indicates the electronic circuitry, horn, and battery are working.
- Vapauta painike. Hälytys lakkaa.
If the alarm does not sound during testing, refer to the Troubleshooting section.
Häiriöhälytysten vaimentaminen
If a non-emergency situation (e.g., cooking smoke) triggers the alarm, you can temporarily silence it:
- Press the Test/Silence button briefly.
- The alarm will enter a temporary silence mode for approximately 10 minutes.
- The alarm will automatically reset after the silence period if the smoke condition has cleared. If smoke is still present, the alarm will reactivate.
Hälytysilmaisimet
- Power/Alarm LED: A red LED light indicates the status of the alarm. It flashes periodically during normal operation and rapidly during an alarm condition.
- Latching Alarm: If multiple interconnected alarms are present, the unit that initiated the alarm will have its red LED flash rapidly, while other interconnected alarms will sound but their LEDs will not flash as quickly. This helps identify the source of the alarm.
6. Huolto
Akun vaihto
The 9-volt battery should be replaced at least once a year, or immediately when the low battery chirp sounds. The alarm will chirp approximately once every minute to indicate a low battery.
- Katkaise hälyttimen virta sulakkeesta.
- Irrota hälytin kiinnikkeestä kiertämällä sitä vastapäivään.
- Avaa paristolokero.
- Remove the old 9-volt battery and dispose of it properly.
- Insert a new 9-volt battery, ensuring correct polarity.
- Sulje paristolokero.
- Reattach the alarm to the mounting bracket by twisting clockwise until secure.
- Restore power at the circuit breaker and test the alarm.
Palovaroittimen puhdistaminen
Clean your smoke alarm at least once a month to remove dust and debris that can interfere with its operation:
- Katkaise hälyttimen virta sulakkeesta.
- Remove the alarm from its mounting bracket.
- Use a soft brush attachment on your vacuum cleaner to gently vacuum the alarm's cover and vents.
- Do not paint the alarm. Paint can clog the openings and interfere with the sensor's ability to detect smoke.
- Reinstall the alarm, restore power, and test.
Signaali elämän päättymisestä
The smoke alarm is designed to provide reliable protection for approximately 10 years. After this period, the unit will emit an end-of-life signal (typically a chirp every 30-40 seconds) to indicate it needs to be replaced. Replace the entire unit immediately upon hearing this signal.
7. Vianmääritys
| Ongelma | Mahdollinen syy | Ratkaisu |
|---|---|---|
| Hälytys ei soi testin aikana. | No power, dead battery, or faulty unit. | Check circuit breaker. Replace 9-volt battery. Ensure alarm is properly connected to wiring harness and mounting bracket. If issues persist, replace unit. |
| Alarm chirps once a minute. | Akku vähissä. | Replace the 9-volt battery immediately. |
| Hälytys piippaa 30–40 sekunnin välein. | End-of-life signal. | Vaihda koko palovaroitinyksikkö. |
| Nuisance alarms (false alarms). | Cooking smoke, steam, dust, high humidity, or insect infestation. | Press the Test/Silence button. Ventilate the area. Clean the alarm. Relocate the alarm if it's consistently triggered by non-fire sources. |
| Alarm malfunctions or behaves erratically. | Loose neutral wire connection. | Katkaise virta katkaisijasta. Check all wire nut connections, especially the white (neutral) wire, in the home junction box to ensure they are secure. If unsure, consult a qualified electrician. |
8. Tekniset tiedot
| Ominaisuus | Erittely |
|---|---|
| Mallinumero | 9120B |
| Virtalähde | 120V AC Hardwired with 9V Battery Backup |
| Anturin tyyppi | Ionisaatio |
| Hälytyksen voimakkuus | 85 dB 10 jalan etäisyydellä |
| Käyttökosteus | 10-95 % RH (ei tiivistyvä) |
| Käyttölämpötila | 40 °F (4.4 °C) - 100 °F (37.8 °C) |
| Mitat (S x L x K) | 1.9 cm x 5.6 cm x 5.6 cm |
| Väri | Valkoinen |
| Materiaali | Muovi |
| Sertifikaatit | UL listattu |
9. Takuu ja tuki
Takuutiedot
This First Alert 9120B Smoke Alarm comes with a 10-year limited warranty. For specific terms and conditions, please refer to the warranty documentation included with your product or visit the official First Alert websivusto.
Asiakastuki
Teknistä tukea, vianmääritystä tai takuuvaatimuksia varten ota yhteyttä First Alertin asiakastukeen. Yhteystiedot löytyvät yleensä tuotepakkauksesta tai First Alertin virallisesta esitteestä. websivusto.





