Schneider Electric (Barber Colman) 2378-501 Relay Els PW 17895 and replacement MPN applications where

and replacement MPN applications where a spline or hex head is required for secure adjustment

allowing for one-handed actuator installation or removal without tools or complex linkages

covering the standard HVAC range and safety damper ventilation modes

We recommend servicing the Trip-L-Trap annually or whenever you notice air bypass or a failure to discharge condensate

As a veteran-grade HVAC inducer fan replacement

Schneider Electric (Barber Colman) 2378-501 Relay Els PW 17895 and replacement MPN applications whereThe Schneider Electric (Barber Colman) 2378 501 Relay is a high performance pneumatic amplifying relay designed for proportional signal control in HVAC systems. Engineered as a Pneumodular component, this device provides a definitive 2: 1 amplifying function, doubling the input signal pressure to the branch line. This is essential for contractors managing larger actuators or terminal units that require higher pressure than the standard controller