During Phase 1 operation, what happens to door reopening devices sensitive to smoke or flame?

During Phase 1 operation of an elevator, door reopening devices that are sensitive to smoke or flame are rendered inoperative without delay. This is a crucial safety feature designed to ensure that the elevator can respond appropriately to emergency conditions, specifically during a fire or smoke situation.

When Phase 1 operation is initiated, it indicates that the elevator is being manually recalled to a designated floor, usually the ground floor or another safe location. The disabling of the door reopening devices prevents the elevator doors from reopening if smoke or fire is detected. This action reduces the risk of passengers exiting the elevator into a hazardous environment and helps maintain integrity within the elevator system and surrounding areas during an emergency evacuation.

This protocol is critical to maintaining safety, as it limits exposure to potential danger and facilitates the orderly management of both personnel and emergency responders in a fire situation. The prompt inactivation of the devices underscores the elevator's design consideration for safety in emergencies, ensuring that the elevator does not inadvertently open its doors in potentially dangerous scenarios.