Air-cooled scroll chillers

10% higher efficiency for Ultracompact II chiller family

Family of Ultracompact II chillers with air-cooled condensers received latest-generation scroll compressors and now offered with lower GWP refrigerants R32, R452b, and R454b. Combined with this, operation efficiency has been lifted by 6% for chillers running on R410a and by 10% for those running on lower GWP gases.

New compressors used for Ultracompact II series feature line-start permanent-magnet (LSPM) motors and low oil carryover rates. The line-start permanent-magnet motors start in asynchronous mode and, after synchronizing with operating frequency, run in synchronous mode – without rotor losses in operation, contributing to the higher operational efficiency of the chiller.

Ultracompact II chillers exceed the requirements of the Ecodesign Directive came into force in January 2021. The free-cooling version, Ultracompact II Freecool, will be available with lower GWP refrigerants in Q2 2021.

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) 89 943 99-8-66 or visit