Schneider Electric (Barber Colman) 2374-401 Relay Refrigerant As a two-pipe pneumatic system

As a two-pipe pneumatic system component

Standard HVAC rotation is determined by looking at the wheel from the hub/drive side

Shock Absorption: The 4-way flexing action prevents end float and minimizes stress on motor bearings during startup

eliminating light-off delays and pilot burner fluttering

The AM-113 crank arm included in this kit is specifically designed for use with 1/2-inch diameter damper shafts

Schneider Electric (Barber Colman) 2374-401 Relay Refrigerant As a two-pipe pneumatic systemThe Schneider Electric 2374 401 Air Motion Relay, formerly under the Barber Colman brand, is a critical pneumatic component engineered for precise HVAC air pressure sensing and airflow monitoring. Designed to function as a differential pressure switch, this device triggers a pneumatic signal based on the presence or absence of air velocity. It operates with a minimum 0. 15" W. C. setpoint, making it sensitive enough to detect subtle changes in suction