Siemens Building Technology GCA166.1P Actuator

The Siemens GCA166.1P is a heavy-duty OpenAir electronic damper actuator engineered for modulating control in demanding HVAC systems. This 24V spring return actuator delivers 160 lb-in of torque, making it a reliable choice for managing large dampers in VAV terminals, air handling units, and face-and-bypass applications. Built with a brushless DC motor, the unit ensures high efficiency and stall protection without the need for limit switches, extending the service life of the internal gear train.

Designed for seamless integration into building automation systems, the GCA166.1P accepts a 0-10VDC control signal and provides precise proportional positioning. The plenum-rated cable and patented self-centering shaft coupling simplify installation, allowing for direct mounting to damper shafts up to 1 inch in diameter. In the event of power loss, the mechanical spring return executes a fail-safe closure in under 15 seconds, protecting critical equipment from unconditioned air or freezing temperatures. It also features dual auxiliary switches that are independently adjustable for signaling end-positions or interlocking with external fans and equipment.

• High Torque Performance: Robust 160 lb-in (18 Nm) rating handles larger damper sections without mechanical binding.
• Fail-Safe Reliability: Durable mechanical spring return ensures 100% closure during emergency power outages.
• Precision Control: Utilizes a 0-10VDC modulating signal for exact airflow management and increased system efficiency.
• Simplified Installation: Self-centering shaft coupling reduces setup time and eliminates the need for complex linkages.
• Code Compliance: 3-foot plenum-rated wiring allows for safe installation within air handling spaces.

Is the Siemens GCA166.1P suitable for outdoor use?
The unit features a NEMA 2 (IP54) rated enclosure. While it handles moisture and dust well, it should be protected from direct weather exposure or installed within a proper weather shield in extreme environments.

Can I adjust the auxiliary switches in the field?
Yes, the dual auxiliary switches are fully adjustable between 0 and 90 degrees, allowing you to customize the trigger points for auxiliary equipment based on the damper position.

Does this actuator require periodic calibration?
The brushless DC motor technology and microprocessor control provide consistent performance without the drift associated with older pneumatic or analog units, though standard system balancing checks are recommended.

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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.