A replacement 311213-404 is required to ensure the structural integrity and safety of the combustion system

Its robust construction and clockwise (CW) rotation make it an essential component for maintaining peak performance in Aaon heating units

spring range allows for fine-tuning gas delivery to meet specific manufacturer manifold requirements

operational levels for HVAC control systems

As a technical successor

Siemens Building Technology GRD126.1U Actuator 320788-704 A replacement 311213-404 is requiredThe Siemens Building Technology GRD126. 1U Actuator is a heavy duty 24V fire and smoke damper actuator designed for two position control in high stakes life safety systems. Delivering 30 lb in torque, this spring return actuator is engineered to meet UL 555 and UL 555S standards, ensuring dampers reach a fail safe position during a power loss or fire event. With a rapid 30 second drive time and a 15 second spring return, it manages combination fire