MONTAIR air cooled liquid chillers of the ENERGIA FREE-COOLING, LIGHT or PLUS line, are ideal for installations where the production of chilled water is required continously and in particular in conditions with low ambient air temperature. Due to the free-cooling function it is possible to obtain chilled water through an air cooled water coil. During the cold months, in the FREE COOLING operation mode, the return liquid of the system is cooled directly by forced convection of outdoor air through the condensation battery, thus saving energy by not operating the unit’s Scroll compressors. A 3-way valve system is commanded by an electronic microprocessor controller that manages the entire unit, allowing functioning in CHILLER, FREE COOLING or MIXED (simultaneously CHILLER and FREE COOLING) modes. ENERGIA FREE-COOLING line units are used together combined with PROGRESSO units in order to cool environments with high technology density like server rooms and data center; that need a constant heat load during all year. In these applications FREE-COOLING technology affords to reduce the energetic consumption considerably, also 50%. ENERGIA FREE-COOLING line units, available in different versions, are equipped with axial fans, Scroll compressors and plate-type exchangers, may be complete with hydraulic circuit with tank, with pump or with tank and pump. A wide range of accessories, factory-fitted or supplied separately, completes the extreme versatility and functionality of this range.