Liebert B-0550S Belt 320074-702 Field Adjustability: Factory set at

Field Adjustability: Factory set at -1

This board eliminates the communication errors and relay instabilities often found in generic alternatives

This OEM-spec M&M 304100 is fully compatible with the McDonnell & Miller Series 221

Smith Vertex and Lochinvar Knight unit specifications

Liebert B-0550S Belt 320074-702 Field Adjustability: Factory set atThe Liebert B 0550S Belt is a critical OEM replacement drive belt designed specifically for high precision environmental control systems and Liebert AC units. Engineered for industrial power transmission, this belt set ensures consistent RPM stability and torque delivery for blower motors and air handlers. As a veteran technician knows, maintaining proper tension and utilizing genuine Liebert parts is essential to prevent premature bearing failure and