Air-cooled chiller

First installation of Lightstream Screw II low-GWP chiller lands in Latvia

In the last week of April, the first new-generation Lightstream Screw II chiller pre-ordered in end-January has been delivered to the customer in Riga, Latvia.

This latest Ecodesign Tier-2 compliant unit is powered by screw compressors and running on low-GWP refrigerant HFO-1234ze, to deliver 500kW cooling for a newly erected shopping mall. Capacity to footprint ratio was an important criterion at the design stage, and Lightstream Screw II, with its high-performance, 4-coil V-shaped microchannel condensers, was best tailored to meet space requirements. Screw compressors with stepless capacity control optimize efficiency, particularly at part-load conditions, which represents the majority of the time in Latvia. Seasonal efficiency (ESEER) of as high as 4.68 makes this solution cost-efficient. The chiller has low sound output and high resilience due to its dual refrigeration circuit.

In total, the Lightstream Screw II series comprises 18 base models (250 to 1850kW cooling), 4 refrigerants – R134a and lower GWP R450a, R513a and HFO-1234ze, and units in low-noise configuration.

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