What is the typical temperature rating for fusible links in fire dampers?

What is the typical temperature rating for fusible links in fire dampers?

• A. 75°F or 90°F
• B. 100°F or 120°F
• C. 165°F or 212°F
• D. 250°F or 300°F

Answer: (C)

The typical temperature rating for fusible links in fire dampers is indeed 165°F or 212°F. Fusible links serve as a critical safety component in fire dampers, where their primary function is to act as a trigger mechanism that holds the damper in a fully open position during normal conditions. When the temperature reaches the rated threshold—typically 165°F or 212°F—the fusible link melts, allowing the damper to close. This closure is essential for preventing the spread of smoke and fire through ductwork and maintaining the integrity of the building's fire protection system. The specified temperature ratings are designed to ensure that the damper does not close under normal heating conditions, which could occur in certain HVAC operational scenarios, thereby preventing unnecessary disruptions. The selection of these precise temperatures aligns with established fire safety standards, which require that dampers respond effectively to heat generated by fire while remaining operational during typical system fluctuations.

The typical temperature rating for fusible links in fire dampers is indeed 165°F or 212°F. Fusible links serve as a critical safety component in fire dampers, where their primary function is to act as a trigger mechanism that holds the damper in a fully open position during normal conditions. When the temperature reaches the rated threshold—typically 165°F or 212°F—the fusible link melts, allowing the damper to close. This closure is essential for preventing the spread of smoke and fire through ductwork and maintaining the integrity of the building's fire protection system.

The specified temperature ratings are designed to ensure that the damper does not close under normal heating conditions, which could occur in certain HVAC operational scenarios, thereby preventing unnecessary disruptions. The selection of these precise temperatures aligns with established fire safety standards, which require that dampers respond effectively to heat generated by fire while remaining operational during typical system fluctuations.