Which combination of devices will initiate elevator Phase I emergency recall?

• A. Machine room smoke detector
• B. Designation level lobby smoke detector
• C. Hoistway smoke detector
• D. All of the above

Answer: (D)

Phase I emergency recall is triggered by any fire alarm initiating device that is connected to the elevator control. Detectors in spaces that directly affect elevator operation—such as the machine room where the elevator equipment is housed, the hoistway where smoke could travel the shaft, and the designated lobby area where occupants may use the elevator—are all valid initiators. When smoke is detected in any of these locations, the fire alarm system sends a signal to recall the car to the safe floor and to prevent travel to other floors. Because each of these detectors can indicate a fire condition that could compromise safe elevator operation, they are all capable of initiating Phase I recall. This is why all of the above can initiate Phase I emergency recall.