these units are typically controlled with a main air supply of 20 psi to ensure full torque delivery and precise damper positioning

The Fenwal DSI module also includes built-in diagnostics via an LED indicator and flame current test pins

and housing assembly

This specific L135F-40 configuration serves as a direct OEM replacement part for a wide range of brands under the International Comfort Products (ICP) umbrella

Rotation is easily reversed by swapping the two primary internal lead connectors

Schneider Electric (Barber Colman) MP-452 Damper Els PW 29614 these units are typically controlledThe Schneider Electric Barber Colman MP 452 is a heavy duty proportional actuator designed for the precise positioning of dampers, valves, and ventilation flaps in high demand industrial and commercial HVAC systems. This non spring return actuator delivers a robust 220 lb in torque, ensuring reliable control even under significant load conditions. Operating on 120V AC power, the MP 452 features a versatile 180 degree rotation and an adjustable timing