Siemens GCA151.1U OpenAir Spring Return Damper Actuator lb-in - 160 24VAC/DC

The Siemens GCA151.1U is an OpenAir GCA Series electronic damper actuator designed for precise control of HVAC dampers in commercial building automation systems. This spring return actuator delivers 160 lb-in torque with 24 VAC/DC power supply and accepts 0-10/2-10 VDC control signals, making it ideal for variable air volume and constant volume applications.

Key Features:

• 90 second run time with 15 second spring return for reliable fail-safe operation
• Brushless DC motor technology with stall protection for long service life
• Bi-directional fail-safe spring return returns damper to safe position during power failure
• Built-in position feedback and signal inversion for precise control
• Patented self-centering shaft coupling simplifies installation
• Manual override and easily visible position indicator
• NEMA 2 (IP54) rated enclosure protects against dust and moisture
• Precabled with 3 ft. 18 AWG standard cable

Technical Specifications:

• Torque: 160 lb-in (18 Nm)
• Power Supply: 24 VAC/DC
• Power Consumption: 7 VA running, 5 VA holding
• Control Signal: 0-10 VDC or 2-10 VDC modulating
• Operating Temperature: -25°F to 130°F (-32°C to 55°C)
• All metal housing construction
• 5-Year Warranty

This actuator is ideal for constant or variable air volume installations controlling return air, mixed air, exhaust, and face and bypass dampers, designed for applications where the damper must return to a fail-safe position during power failure. The spring return mechanism ensures reliable operation in critical HVAC applications.