Refrigeration engineers can select the company’s Varispeed compressor series with integrated frequency inverter or speed control provided by the CRII mechanical capacity control. The CRII mechanical capacity control boasts fewer control deviations and a large range of control. Compared with compressors operated with frequency inverters, the control achieves somewhat lower efficiency levels in the lower part-load range. However, this is of little importance when it comes to systems with several compressors and large-volume cooling positions. The modulation range for two-, four- and six-cylinder compressors is between 10 and 100 percent.

Bitzer US Inc.