What is the function of a fusible link in a fire damper?

What is the function of a fusible link in a fire damper?

• A. Regulates the airflow in the duct
• B. Acts as a trigger to close the damper in high heat
• C. Controls the noise produced by the damper
• D. Is used for maintenance reminders

Answer: (B)

The function of a fusible link in a fire damper is to act as a trigger that responds to high heat conditions. When the temperature reaches a certain threshold, typically around 165°F (74°C), the fusible link melts, which releases a holding mechanism that allows the damper blades to close. This action is crucial in preventing the spread of smoke and fire within a building, thereby providing essential protection and enhancing life safety in the event of a fire. The fusible link plays a vital role in ensuring that the fire damper operates automatically without the need for electrical connections, making it a reliable safety feature in HVAC systems. This allows for a quick and effective response to a fire situation, in line with the safety standards set by NFPA regulations.

The function of a fusible link in a fire damper is to act as a trigger that responds to high heat conditions. When the temperature reaches a certain threshold, typically around 165°F (74°C), the fusible link melts, which releases a holding mechanism that allows the damper blades to close. This action is crucial in preventing the spread of smoke and fire within a building, thereby providing essential protection and enhancing life safety in the event of a fire.

The fusible link plays a vital role in ensuring that the fire damper operates automatically without the need for electrical connections, making it a reliable safety feature in HVAC systems. This allows for a quick and effective response to a fire situation, in line with the safety standards set by NFPA regulations.