Automation of air conditioning units and machine hall with 5 PLC + HMI controllers from UNITRONICS - Israel. The system is configured from 180 digital input/output points and 60 temperature points. Summer and winter ventilation mode with temperature control, preparation of hot tap water, preparation of hot water for radiator heating in winter mode and preparation of cold water for fancoil cooling in summer mode. Settings for weekly time schedules involve setting of the desired temperature and work capacity for each air conditioning unit. Modulated control of fans for air conditioning units with 10 YASKAWA variable speed drives.