The Belimo BAE165 is a professional-grade 165°F electric thermal sensor engineered for critical integration within fire and smoke damper systems. Designed to interface directly with Belimo FSxx series actuators, this thermoelectric tripping device functions as a primary safety limit that interrupts power when duct temperatures exceed the 165°F (74°C) threshold. Featuring a Single Pole Single Throw (SPST), normally closed configuration, it ensures that the connected fire and smoke damper actuator returns to its fail-safe position during a thermal event. The unit is high-limit resettable, allowing contractors to manually restore operation via a built-in reset button once ambient conditions have stabilized. Built for reliability in demanding HVACR environments, it supports a wide rated voltage range of 24V to 240V AC, making it a versatile component for UL555S applications. Proper installation requires the sensing nose to be positioned within the primary airstream for accurate thermal detection and NEC-compliant Class 1 field wiring. Key Benefits Normally closed SPST contact ensures dependable fail-safe positioning for fire dampers. Wide rated voltage compatibility (24V to 240V AC) for seamless integration with various actuator models. Manual reset capability allows for system restoration after a thermal trip event. Optimized for UL555S fire and smoke applications to meet stringent life safety building codes. Rugged design facilitates unobstructed airflow sensing when mounted directly on ductwork or damper frames. Common Questions How do I wire the BAE165 into an existing actuator circuit? The sensor should be connected in series with the power supply of the fire and smoke control actuator using copper conductors (12-22 AWG) rated for at least 75°C, following NEC Class 1 wiring methods. Can the BAE165 be used as a general HVAC high-limit switch? No, this device is specifically engineered and tested for UL555(S) fire and smoke applications and should not be used as a safety limit in other non-rated systems. How do I reset the device after a temperature trip? Once the duct temperature drops below 165°F, perform a thorough inspection of the damper and actuator. If no damage is found, gently press the manual reset button on the housing to restore power to the actuator. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
