The Constantia-Q series tandem air-cooled chiller units are equipped with four compressors and a dual cooling circuit, providing high capacity control and distributed risk of failure. With the four compressors, the total capacity can be achieved gradually (%25 to %100). This significantly reduces the starting current and electricity consumption of the device. Additionally, in the event of a compressor failure, the unit continues to operate at the remaining compressor capacity, preventing a complete process shutdown. Compared to its counterparts, it offers lower initial investment costs, high temperature sensitivity, a colored touchscreen control panel, and easy and fast installation thanks to the integrated hydraulic module. The Constantia-Q series air-cooled chiller units have a capacity range of 65.7-498 kW.