Belimo BAE165 Thermal Sensor

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.

• 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.

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.