What is the role of the "elevator recall" feature in fire protection systems?

The elevator recall feature plays a critical role in fire protection systems by ensuring safety during emergencies. When a fire alarm is activated, the recall function automatically directs the elevators to return to a pre-designated floor, typically the ground floor or the floor where emergency responders are located. This is crucial because it prevents the elevators from being used while there may be a fire or smoke involved, which could pose a danger to occupants trying to use the elevators during an evacuation.

By guiding the elevators to a safe location and preventing them from stopping at floors where people may be trapped, the recall feature helps to facilitate the safe evacuation of building occupants and provides a safer environment for emergency personnel who may need to respond to the situation. This ensures that elevators are not in use during a fire emergency, thereby reducing the risk of injury and allowing for clear access for firefighting operations.