Control units that perform releasing service must be?

• A. Connected to the building fire alarm system
• B. Listed for releasing service
• C. Monitored for alarm, trouble, and supervisory signals
• D. Physically separated from the system

Answer: (B)

Releasing service devices must be listed for releasing service. This means the control unit has been tested and certified by a recognized testing laboratory specifically for releasing operations, confirming it is designed and proven to perform this critical function reliably and safely within a fire protection system. Listing ensures proper design, wiring, power, and fail-safe behavior, and it gives the authority having jurisdiction confidence that the device will operate as intended in an emergency. While these units typically interface with the building’s fire alarm system and may be monitored, those factors describe how they are used rather than the essential requirement that qualifies them for releasing service. Being physically separated from the system is not a universal requirement.