ABB ACH580-01-073A-4+B056 ACH580-01 Wall-mounted drive for HVAC 37 kW. ABB ACH580-01-073A-4+B056 is an ACH580 HVAC drive rated 73 A, frame R4. It is designed for air-handling units, chillers, cooling towers, pumps and ventilation fans, with ABB drive control and energy-efficient motor operation.