Siemens SR series - User Manual
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OpenAir™
Technical Instructions
Document No. 155-315P25
EA GMA
January 26, 2011
GMA Series, Spring Return, 62 lb-in,
Rotary, Electronic Damper Actuators
Siemens Industry, Inc.
Description
The OpenAir direct-coupled spring return electronic actuator is designed for
modulating, two-position, and floating control of building HVAC dampers.
Features
Brushless DC motor technology with stall protection
Bi-directional fail-safe spring return
Models available with dual, independently adjustable auxiliary switches
Unique self-centering shaft coupling
Manual override
Available in 62 lb-in torque
5° preload as shipped from factory
Mechanical range adjustment capabilities
UL and cUL listed, CE certified
24 Vac/dc compatible
Application
Used in constant or variable air volume installations for the control of return air, mixed
air, exhaust, and face and bypass dampers requiring up to 62 lb-in (7 Nm) torque.
Designed for applications that require the damper to return to a fail-safe position when
there is a power failure.
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