Danfoss has added to its portfolio of low-GWP (global warming potential) compressors by introducing an option to use R-513A, and expanded its operating map range to cover low-lift applications for the TT Series compressor family. R-513A is a low-GWP, non-flammable (A1) alternative refrigerant to R-134a that allows chiller manufacturers to meet future HFC regulations, such as the European Union’s F-gas regulation. All Turbocor® TT Series compressors produced starting in December 2017 with compressor firmware version 4.1 will be compatible with both R-134a and R-513A. Existing Turbocor® TT Series compressor revision F models using R-134a can be retrofitted to use R-513A by changing the electronic controllers.

This new refrigerant option broadens Danfoss’ portfolio of Turbocor® compressors using low-GWP refrigerants. In addition to the TT Series compressors, Danfoss already offers the Turbocor® TG Series compressors that use ultra-low-GWP refrigerant HFO-1234ze. Similar to R-513A, HFO-1234ze allows chiller manufacturers to be in compliance with upcoming refrigerant regulations that restrict the use of HFC refrigerants.
In summary, the following Danfoss Turbocor® compressors now use low-GWP refrigerants:

  • Available with HFO-1234ze: Danfoss Turbocor® TG Series Compressors – 40 to 150 tons
  • Available with R134a and R513A:  Danfoss Turbocor® TT Series Compressors – 60 to 200 tons