Siemens Building Technology GCA121.1U Actuator
The Siemens GCA121.1U is a high-performance spring return rotary damper actuator designed for the heavy-duty demands of commercial HVAC systems. Delivering a robust 142 lb-in torque (rated up to 160 lb-in in specific applications), this 24VAC damper actuator provides reliable on/off 2-position control for return air, exhaust, and face-and-bypass dampers. Built with brushless DC motor technology, the unit features integrated stall protection to prevent motor burnout, ensuring long-term operational stability in variable air volume (VAV) environments.
This Siemens OpenAir GCA series actuator utilizes a patented self-centering shaft coupling that eliminates side loading and accommodates damper shafts up to 1 inch in diameter. In the event of a power loss, the mechanical fail-safe spring return engages to move the damper to its "0" position in under 20 seconds. The die-cast aluminum NEMA 2 housing provides a rugged enclosure for field installation. This direct-coupled actuator is pre-shipped with a 5° preload to ensure tight damper seal compression upon closure, streamlining the commissioning process for technicians.
Key Benefits- 142 lb-in Torque: Provides high-force rotation for large-scale building automation dampers.
- Fail-Safe Reliability: Mechanical spring return ensures immediate closure during power interruptions.
- Self-Centering Coupling: Simplifies mounting and prevents shaft wear by ensuring concentric alignment.
- Brushless DC Motor: Maintenance-free operation with electronic stall protection throughout the full 90° stroke.
- NEMA 2 Protection: Durable aluminum alloy housing designed for standard mechanical room environments.
Is the Siemens GCA121.1U compatible with 120V systems?
No, this specific model requires a 24VAC/DC power supply. For 120V applications, use the GCA221.1U series.
Can I manually position the damper during installation?
Yes, the unit includes a manual override feature that allows technicians to position the shaft without power being applied.
How do I adjust the fail-safe direction?
The fail-safe direction (clockwise or counter-clockwise) is determined by the mounting orientation of the actuator on the damper shaft.
This item is not eligible for free shipping.
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.
Siemens Building Technology GCA121.1U Actuator
The Siemens GCA121.1U is a high-performance spring return rotary damper actuator designed for the heavy-duty demands of commercial HVAC systems. Delivering a robust 142 lb-in torque (rated up to 160 lb-in in specific applications), this 24VAC damper actuator provides reliable on/off 2-position control for return air, exhaust, and face-and-bypass dampers. Built with brushless DC motor technology, the unit features integrated stall protection to prevent motor burnout, ensuring long-term operational stability in variable air volume (VAV) environments.
This Siemens OpenAir GCA series actuator utilizes a patented self-centering shaft coupling that eliminates side loading and accommodates damper shafts up to 1 inch in diameter. In the event of a power loss, the mechanical fail-safe spring return engages to move the damper to its "0" position in under 20 seconds. The die-cast aluminum NEMA 2 housing provides a rugged enclosure for field installation. This direct-coupled actuator is pre-shipped with a 5° preload to ensure tight damper seal compression upon closure, streamlining the commissioning process for technicians.
Key Benefits- 142 lb-in Torque: Provides high-force rotation for large-scale building automation dampers.
- Fail-Safe Reliability: Mechanical spring return ensures immediate closure during power interruptions.
- Self-Centering Coupling: Simplifies mounting and prevents shaft wear by ensuring concentric alignment.
- Brushless DC Motor: Maintenance-free operation with electronic stall protection throughout the full 90° stroke.
- NEMA 2 Protection: Durable aluminum alloy housing designed for standard mechanical room environments.
Is the Siemens GCA121.1U compatible with 120V systems?
No, this specific model requires a 24VAC/DC power supply. For 120V applications, use the GCA221.1U series.
Can I manually position the damper during installation?
Yes, the unit includes a manual override feature that allows technicians to position the shaft without power being applied.
How do I adjust the fail-safe direction?
The fail-safe direction (clockwise or counter-clockwise) is determined by the mounting orientation of the actuator on the damper shaft.
This item is not eligible for free shipping.
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.
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Description
The Siemens GCA121.1U is a high-performance spring return rotary damper actuator designed for the heavy-duty demands of commercial HVAC systems. Delivering a robust 142 lb-in torque (rated up to 160 lb-in in specific applications), this 24VAC damper actuator provides reliable on/off 2-position control for return air, exhaust, and face-and-bypass dampers. Built with brushless DC motor technology, the unit features integrated stall protection to prevent motor burnout, ensuring long-term operational stability in variable air volume (VAV) environments.
This Siemens OpenAir GCA series actuator utilizes a patented self-centering shaft coupling that eliminates side loading and accommodates damper shafts up to 1 inch in diameter. In the event of a power loss, the mechanical fail-safe spring return engages to move the damper to its "0" position in under 20 seconds. The die-cast aluminum NEMA 2 housing provides a rugged enclosure for field installation. This direct-coupled actuator is pre-shipped with a 5° preload to ensure tight damper seal compression upon closure, streamlining the commissioning process for technicians.
Key Benefits- 142 lb-in Torque: Provides high-force rotation for large-scale building automation dampers.
- Fail-Safe Reliability: Mechanical spring return ensures immediate closure during power interruptions.
- Self-Centering Coupling: Simplifies mounting and prevents shaft wear by ensuring concentric alignment.
- Brushless DC Motor: Maintenance-free operation with electronic stall protection throughout the full 90° stroke.
- NEMA 2 Protection: Durable aluminum alloy housing designed for standard mechanical room environments.
Is the Siemens GCA121.1U compatible with 120V systems?
No, this specific model requires a 24VAC/DC power supply. For 120V applications, use the GCA221.1U series.
Can I manually position the damper during installation?
Yes, the unit includes a manual override feature that allows technicians to position the shaft without power being applied.
How do I adjust the fail-safe direction?
The fail-safe direction (clockwise or counter-clockwise) is determined by the mounting orientation of the actuator on the damper shaft.
This item is not eligible for free shipping.
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.
