1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Putogesafe GS521C-A Photoelectric Smoke Detector. Please read this manual thoroughly before installation and retain it for future reference. This device is designed to detect smoke and provide an audible alarm, offering early warning of potential fire hazards.

Image: Three Putogesafe GS521C-A smoke detectors, showcasing their compact, circular design with a central test/silence button.
2. Important Safety Information
Please observe the following safety precautions:
- This smoke detector is designed for residential use.
- Do not paint the smoke detector. Paint can interfere with the sensor's ability to detect smoke.
- Test the smoke detector weekly to ensure proper operation.
- Never ignore a smoke alarm. Investigate the cause and take appropriate action.
- Do not attempt to repair the unit yourself. Refer to the troubleshooting section or contact support.
3. Package Contents
Verify that all items are present in your package:
- Putogesafe GS521C-A Smoke Detector(s)
- Mounting Bracket
- Screws and Anchors
- Instruction Manual
4. Product Features
- 10-Year Battery Life: Equipped with a 10-year 3V lithium battery for continuous power supply, reducing the need for frequent battery replacement.
- Photoelectric Sensor: Utilizes photoelectric technology optimized for detecting slow-burning fires, providing early warning.
- Test/Silence Button: Features a large button for weekly testing and silencing non-emergency alarms (e.g., from cooking steam). The test sound is designed to be low initially to prevent startling occupants.
- Low Battery Warning: Provides an audible and visual indication when the battery is low, prompting replacement.
- 10-Hour Non-Disturb Mode: When a low battery warning occurs, pressing the test/silence button activates a 10-hour non-disturb mode, temporarily silencing the warning beep.
- Durable Construction: Made from ABS material with UV additives to resist yellowing and ensure longevity.
- Audible Alarm: Produces an alarm sound louder than 85dB at 3 meters.

Image: An exploded view of the smoke detector, highlighting its internal components including the 10-year battery, photoelectric sensor, and test button.

Image: A detailed view of the smoke detector's exterior, pointing out the 85dB alarm, test/silence button, and air vents.
5. Setup and Installation
5.1 Recommended Placement
For optimal protection, install smoke detectors in every sleeping room and on every level of your home, including the basement. For homes with multiple levels, install a smoke detector in the hallway outside of sleeping areas.
- Install on the ceiling in the center of the room or hallway.
- If ceiling mounting is not possible, install on a wall between 4 and 12 inches (10-30 cm) from the ceiling.
- Avoid placing detectors near windows, doors, or air vents where drafts could interfere with smoke detection.
- Keep detectors at least 20 feet (6 meters) away from cooking appliances to minimize false alarms.

Image: A person installing the smoke detector on a ceiling, demonstrating the ease of installation with included hardware.
5.2 Installation Steps
- Choose a suitable location according to the recommended placement guidelines.
- Use the mounting bracket as a template to mark the screw holes on the ceiling or wall.
- Drill holes at the marked positions and insert the plastic anchors.
- Attach the mounting bracket to the ceiling or wall using the provided screws.
- Align the smoke detector with the mounting bracket and twist clockwise until it locks securely into place.
5.3 Activation
Before commissioning the smoke alarm, it is important to activate it and test it for correct operation.
Press the test button and hold it for approximately 3 seconds until the LED indicator lights up and then release the test button immediately. The smoke alarm will generate a beep to indicate that it is activated.

Image: Visual guide for activating the smoke detector by pressing the test button.
6. Operation
6.1 Normal Operation
During normal operation, the LED indicator will flash briefly every 40-60 seconds to confirm the unit is functioning correctly.
6.2 Testing the Alarm
It is recommended to test the smoke detector weekly. Press and hold the 'TEST/SILENCE' button for a few seconds. The alarm will sound, and the LED will flash. Release the button to stop the test.

Image: Demonstrates testing the smoke detector using a long stick to reach the test/silence button.
6.3 Silencing the Alarm
In case of a non-emergency alarm (e.g., from cooking fumes), press the 'TEST/SILENCE' button to temporarily silence the alarm for approximately 10 minutes. The detector will automatically reset after this period.
6.4 Alarm Sound Gradient
When the test button is pressed to activate the test alarm or when smoke triggers the alarm, the first six sounds are low decibels. The sound starts low and gradually increases in volume from the seventh sound onwards. This progressive increase in volume is a design feature to prevent startling occupants.

Image: A smoke detector indicating an alarm, illustrating the gradual increase in alarm volume.
7. Maintenance
7.1 Cleaning
Clean your smoke detector at least once a month. Use a soft brush or a vacuum cleaner with a soft brush attachment to remove dust and debris from the vents. Do not use water or cleaning solvents.
7.2 Battery Replacement
The smoke detector is equipped with a sealed 10-year lithium battery that is not user-replaceable. When the battery is low, the unit will emit a low battery warning (a chirp every 40-60 seconds). At this point, the entire unit should be replaced.

Image: Illustrates the 85dB loud alarm and the visual indicator for a low battery warning.
7.3 End of Life Indication
After approximately 10 years of operation, the smoke detector will indicate its end of life with a specific pattern of chirps or flashes. At this point, the entire unit must be replaced.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Alarm sounds randomly or frequently without smoke. | Dust accumulation, high humidity, cooking fumes, steam. | Clean the detector. Relocate if consistently triggered by cooking or steam. Press silence button for temporary mute. |
| Chirping sound every 40-60 seconds. | Low battery warning. | The battery is sealed and not replaceable. The unit has reached its end of life. Replace the entire smoke detector. Press the test/silence button for 10 hours of non-disturb mode. |
| No alarm during test. | Unit not activated, faulty unit. | Ensure the unit is activated as per Section 5.3. If still no alarm, the unit may be faulty and requires replacement. |
| LED not flashing during normal operation. | Unit not activated, faulty unit. | Ensure the unit is activated as per Section 5.3. If the LED still does not flash, the unit may be faulty and requires replacement. |
9. Specifications
- Model: GS521C-A
- Sensor Type: Photoelectric
- Power Source: 10-Year Sealed 3V Lithium Battery (non-replaceable)
- Alarm Loudness: >85dB at 3 meters
- Operating Humidity: Up to 95% RH (non-condensing)
- Material: ABS (Fire-resistant, UV-resistant)
- Product Dimensions: 3.9" (W) x 3.9" (D) x 1.3" (H) (100mm x 100mm x 34mm)
- Item Weight: 9.6 ounces
- Color: White
- UPC: 768481511117

Image: The compact design of the smoke detector, held in a hand, with its dimensions indicated.
10. Warranty and Support
Putogesafe provides customer support for its products. If you encounter any issues or have questions regarding your GS521C-A smoke detector, please contact our support team. Refer to the product packaging or the official Putogesafe website for contact information.
Please retain your proof of purchase for warranty claims.




