What is the role of a fire department connection (FDC) in a sprinkler system?

The role of a fire department connection (FDC) in a sprinkler system is to provide a means for fire department personnel to supplement the water supply in the event of a fire. This connection allows firefighters to connect hoses from their fire apparatus to introduce additional water into the sprinkler system, ensuring there is adequate pressure and volume to effectively combat a fire. Having this connection is critical in situations where the building's existing water supply may not be sufficient to handle the fire, allowing firefighters to enhance the sprinkler system's capabilities immediately.

The other functions mentioned, such as indicating water supply pressure or controlling alarm cycling, do not pertain to the specific purpose of the FDC. Similarly, releasing smoke control dampers is unrelated to the function of supplemental water supply. Understanding the specific roles of elements within a sprinkler system is crucial for effective firefighting and safety protocols.