This dataset includes the field data from the unit installed in a supermarket in Italy. There are sensors in the system to make necessary measurements. The measured data is collected, stored and then converted into usable data. The system layout includes all the characteristics of a MultiPACK unit, i.e. integration of all functions, refrigeration, space heating and cooling and hot water production, in the same appliance, while adopting the state-of-the-art technology for CO2 refrigeration, i.e. parallel compression, ejectors for expansion work recovery, minimized superheat for evaporators with suction pressure receiver and liquid ejectors for possible liquid recirculation.