Description
Siemens GMA221.1U 2-Position Spring Return Actuator Overview
The Siemens GMA221.1U is a 2-position spring return damper actuator engineered for dependable on/off control in commercial and industrial HVAC applications. Operating at 120V and delivering 62 lb-in of torque, this actuator provides the muscle needed to drive dampers to the open or closed position with confidence — and automatically returns to its fail-safe position upon loss of power thanks to the integrated spring return mechanism.
Key Features
- 2-position (open/closed) spring return operation for fail-safe performance
- 120V AC supply voltage for straightforward integration with standard control circuits
- 62 lb-in (7 Nm) rated torque for reliable damper actuation
- Spring return fail-safe: automatically returns to de-energized position on power loss
- Compact, robust housing suitable for commercial HVAC environments
- Designed for use with Siemens and compatible damper assemblies
- Easy direct-couple mounting — no linkage required
Typical Applications
- Air handling units (AHUs) and rooftop units (RTUs)
- Outdoor air, exhaust, and return air dampers
- VAV and zone damper control systems
- Building automation and energy management systems
- Commercial and light industrial HVAC installations
Product Specifications
- SKU / Part Number: GMA221.1U
- Brand: Siemens Building Technology
- Actuator Type: 2-Position Spring Return
- Supply Voltage: 120V AC
- Torque Output: 62 lb-in
- Control Action: On/Off (2-position)
- Fail-Safe: Spring Return
Trust Siemens Building Technology for precision-engineered HVAC controls that meet the demands of modern commercial buildings. The GMA221.1U delivers consistent, fail-safe damper actuation to keep your system running efficiently and safely.
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