A multichannel data logger Yokogawa MX 100 has been utilised and programmed on the LabView platform to fulfil the tasks of data acquisition, monitoring and system control. Typologies, numbers and displacement of the sensors installed for the monitoring as far as the indicators used to evaluate the performances of the system have been chosen taking into account the recommendations included in the guidelines and monitoring procedures of the Task 38 “Solar Air Conditioning and Refrigeration” of IEA. The system is fully operating since March 2008. Monitoring results presented are related to the summer season operation and are referred to the month July 2008. The operation time schedule was from 7.00 to 19.00 every day of the week. Outside air conditions in the observed period were averagely moderate with a mean temperature and humidity ratio respectively of 30.1 °C and 13.9 g/kg and peak values of 34 °C and 17.4 g/kg. The maximum registered cooling load of the building was

18.1 kW. Latent loads simulated in the building were variable in the range of 2 to 3.6 kW that corresponds respectively to an equivalent number of occupants of about 30 to 60.