Lightstream Screw II Inverter air-cooled chiller

Efficiency step up for variable speed chillers

Kaltra has officially launched the Lightstream Screw II Inverter chiller lineup, its next generation of air-cooled chillers, now compliant with Ecodesign Tier-2 requirements.

First announced in March, the new chiller range offers industry-leading seasonal energy efficiency and innovative control capabilities. The range employs inverter-powered screw compressor technology to continuously control cooling capacity and enhancing water temperature stability. Lightstream Screw II Inverter is 21% more efficient in seasonal energy efficiency on average compared to predecessor models and 3% more efficient at full load. New control algorithms recognize the conditions of the installed environment, supplying optimized cooling performance. Sustainability options include refrigerants R1234ze, R513a, and R450a with refrigerant leakage monitoring.

As was with the fixed-speed compressor version, Lightstream Screw II Inverter equipped with 4-coil microchannel condenser V-banks, shell-and-tube evaporators with optimized flow pattern or, optionally, with falling film evaporators allowing a significant reduction in refrigerant charge.

Standard and higher efficiency (with extra condensers) versions are available, along with low-noise configurations.

Headquartered in Germany and Austria, Kaltra designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillersprecision air conditionersIT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensersdry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminium coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.

For more information on Kaltra and its products call +49 (0) 911 253 421 07 or visit