Modular water-water chiller for internal installation with "oil-free" magnetic levitation centrifugal compressors, flooded tube core heat exchanger with a spray system on the plant side and R134a refrigerant. Suitable for high use in residential, commercial and industrial buildings. WMX is a modular water-water chiller, which operates with R134a, internal single-circuit, equipped with high efficiency two-stage magnetic levitation centrifugal compressors. This compressor makes it possible to remove circulating lubricant oil and have very low starting currents. The machine is equipped with flooded heat exchangers on the source side and on the plat side, which allow the reduction of refrigerant load by as much as 50%. Available in the standard or silenced version with soundproof cowling, and high or very high efficiency. The unit boasts efficiency at partial loads with very high ESEER values, an electronic thermostatic valve, touch-screen LCD user interface, reduced way and greater compactness.