SL177 - Smoke detector FIRST ALERT - Free user manual and instructions
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| Product Type | Smoke Detector |
| Brand | First Alert |
| Model | SL177 |
| Sensor Type | Photoelectric |
| Power Source | 9V Battery (included) |
| Battery Life | Approximately 1 year |
| Dimensions (Diameter x Height) | 4.5 in x 1.5 in (11.4 cm x 3.8 cm) |
| Weight | 0.5 lb (227 g) |
| Installation Method | Ceiling or wall mount with included screws |
| Test/Silence Button | Yes, for testing and silencing false alarms |
| Low Battery Warning | Chirps every 30-60 seconds |
| End of Life Signal | 8 chirps per minute after 10 years |
| Operating Temperature | 40°F to 100°F (4°C to 38°C) |
| Humidity Range | Up to 95% relative humidity (non-condensing) |
| Compliance | UL 217 Listed |
| Maintenance | Test weekly; vacuum dust monthly; replace battery annually |
| Warranty | 10-year limited warranty |
Frequently Asked Questions - SL177 FIRST ALERT
Where should I install the First Alert SL177 smoke detector?
Install on the ceiling or high on a wall, at least 4 inches from the wall-ceiling junction. Avoid areas near kitchens, bathrooms, or windows.
How do I stop false alarms?
Press the test/silence button to temporarily silence the alarm. Clean the detector with a vacuum or soft brush to remove dust or insects.
How often should I change the battery?
Replace the 9V battery at least once a year, or when the low battery chirp sounds (every 30-60 seconds).
What does the chirping sound mean?
A chirp every 30-60 seconds indicates a low battery. A chirp every 30-40 seconds may indicate end of life (after 10 years).
How do I test the smoke detector?
Press and hold the test button until the alarm sounds (3-5 seconds). Release to stop. Test weekly.
How long does the detector last?
The First Alert SL177 has a 10-year lifespan. Replace the entire unit after 10 years from the date of manufacture.
Can I paint the smoke detector?
No. Paint can clog the sensor and prevent proper operation. Keep the detector unpainted.
What should I do if the alarm sounds while cooking?
Press the silence button to quiet the alarm. Improve ventilation by opening a window or turning on a fan. Do not disable the detector.
Is the SL177 interconnected with other alarms?
No, this model is a standalone unit and cannot be wirelessly interconnected with other alarms.
How do I clean the smoke detector?
Vacuum the vents with a soft brush attachment every month to remove dust and debris. Do not use water or cleaners.
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