In this dataset, data from the pre-commissioning tests of the MultiPACK unit for hotels that were carried out at the factory’s facilities were shared. The scheme of the refrigerating system is provided in Figure 1, while the characteristics of the main components are listed in Table 1. The unit has two semi-hermetic compressors (compressor(1) and compressor(2)), two brazed-plate gas-coolers (gas-cooler(1) and gas-cooler(2)), a finned-coil heat exchanger (gas-cooler/evaporator(3)), an internal heat exchanger (IHX) between the compressor suction line and gas-cooler outlet line, a back-pressure valve (BPV), a multi-ejector rack, a low-pressure receiver (LPR) and an electronic expansion valves (EEV(1)). The operation of the system can be switched between two main configurations, i.e. heat pump and chiller, by means of circulation valves located in the circuit.