ABB ACH580-01-039A-4 18.5 kW Hvac Drive. ABB ACH580-01-039A-4 is an ACH580 HVAC drive rated 18.5 kW, 380-480 V, frame R3. It is designed for air-handling units, chillers, cooling towers, pumps and ventilation fans, with ABB drive control and energy-efficient motor operation.