The new VARIPACK product series of frequency inverters is designed for safe and easy capacity control and was specially adapted to suit refrigeration and operation of BITZER refrigeration compressors. After intuitive commissioning, the frequency inverters take over the control functions of the refrigeration system. Optimised adjustment to suit the system’s current cooling demand reduces energy consumption as well as running costs. With its modular design, the VARIPACK series achieves a high degree of flexibility and opens up a wide spectrum of variants for a large application range in supermarkets, hotels, restaurants as well as food production and processing centres. The series is suitable for refrigeration systems, air conditioning systems and heat pumps and can be integrated both in single compressors and in compound systems.
VARIPACK frequency inverters can be operated in two modes: the compressor capacity control either depends on an external set point signal or on the evaporation pressure with an optionally available add-on module for pressure control. In addition to direct control of the evaporation pressure, the condenser fan can also be regulated via a 0–10 V output signal and a second compressor can also be switched on. The frequency inverters can either be integrated completely in a switchboard or mounted via push-through installation as desired. With the second option, smaller switch boards are sufficient because the heatsink protrudes out of the switch board, causing most of the generated heat to be directly dissipated outside. This means that a switch board fan is no longer required.