BITZER has added models with IP55 and IP66 enclosure classes to its range of VARIPACK frequency inverters. Naturally, the new additions retain all of the product family’s known properties such as user-friendliness, reliability and performance.
VARIPACK frequency inverters are designed for safe and easy capacity control and have been specially adapted for refrigeration and for the operation of BITZER refrigeration compressors. They open up a wide range of applications in supermarkets, hotels and restaurants as well as food manufacturing and processing. VARIPACK is suitable for refrigeration and air conditioning systems as well as heat pumps and can be combined with single compressors and compound systems alike. After intuitive commissioning, the frequency inverters take over the control functions of the refrigeration system. They can be mounted in a switch cabinet (IP20) or outside of the switch cabinet thanks to the higher IP55/66 enclosure class.
VARIPACK frequency inverters can be operated in two modes: The compressor’s capacity can either be controlled depending on an externally set signal or on the evaporation temperature with an optionally available pressure control add-on module. In addition to direct control of the evaporation temperature, the speed of the condenser fan can be set via a 0–10 V output signal and a second compressor can be switched on. With regard to pressure control, the frequency inverters have a database of all commonly used refrigerants for ease of configuration and monitoring.