WMG is a modular water-water chiller, which operates with R1234ze, 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.