Johnson Controls M9208-AGC-3 Spring Return On/Off Floating 2 SPDT Actuator with Integral 3/8" FMC Connectors - The M9208-xxx-x Series Electric Spring Return Actuators provide control of dampers in Heating, Ventilating, and Air Conditioning (HVAC) systems. All actuators in this series provide 70 lb??in (8 N??m) rated torque. A mechanical spring return system provides rated torque with and without power applied to the actuator.. Johnson Controls. Johnson Controls. M9208-AGC-3.