This Electronic Damper Actuator is used on the Greenwood furnace and other Indoor Wood Boilers. Two-Position Actuator, Spring Return, Shaft Type Self-Centering Shaft Coupling, Torque (In.-Lbs.) 62, Stroke Deg. 90, Height (In.) 8-3/4, Width (In.) 2-1/2, Depth (In.) 2-1/4, Timing (Sec.) 90, Voltage 120 VAC, Includes Mounting Bracket And Screws his GMA OpenAir Small Spring Return Damper Actuator is designed for control of building HVAC dampers and for applications where the damper is required to return to a fail-safe position when there is a power failure. This actuator has 2-position control, standard cabling, an operating voltage of 115 Volts AC and a 62 inch pound running torque. Feature 2-position, 0-10Vdc Self Centering Shaft Coupling (¾" capability) Brushless DC motor Aluminum die cast housing Easy-to-read position indicator Precabled, with plenum-rated cabling optional UL, C-UL, listed, CE certified 24 VAC/DC compatible; 120 VAC 0 to 10V models have built-in feedback Integral ½" threaded conduit connection Electronic overload protection Sample Applications Outside air dampers Mixing boxes Small rooftop units Return air dampers Zone isolation dampers Makeup air dampers Economizer units