ABB ACH580-01-091A-2 22 kW HVAC drive. ABB ACH580-01-091A-2 is an ACH580 HVAC drive rated 22 kW, 91 A, 200-240 V, 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.