Description
The Siemens S55155-A109 is a 24VAC floating control actuator from the SR 300N series, engineered for reliable and precise valve control in commercial and industrial HVAC applications. Designed to integrate seamlessly with building automation systems, this actuator delivers consistent performance for hydronic heating, cooling, and air handling systems.
Key Features
- 24VAC floating control signal for smooth, stepless valve positioning
- SR 300N series actuator designed for demanding commercial HVAC environments
- Compatible with Siemens Building Technology control systems and third-party BAS platforms
- Compact, robust construction for long-term reliability in field installations
- Suitable for use with two-way and three-way control valves in hydronic systems
- Floating (tri-state) control input for easy integration with standard controllers
Applications
- Hydronic heating and cooling coil valve control
- Air handling unit (AHU) hot water and chilled water valves
- Fan coil unit (FCU) valve actuation
- Building automation and energy management systems
Why Choose Siemens SR 300N Actuators?
Siemens Building Technology actuators are trusted across commercial HVAC installations worldwide for their precision engineering, long service life, and compatibility with a wide range of control platforms. The S55155-A109 offers straightforward wiring and commissioning, reducing installation time and ensuring dependable operation season after season.
Specifications
- SKU: S55155-A109
- Brand: Siemens Building Technology
- Series: SR 300N
- Control Type: Floating (Tri-State)
- Supply Voltage: 24VAC







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