Quick, safe and efficient

The right control for every application: BITZER is bridging the gap between its basic CRII control and its high-end VARISPEED series with intelligent VARIPACK frequency inverters

Capacity control systems from BITZER are distinguished by their flexibility, range of potential applications and greater efficiency. Because every application is unique, the refrigeration compressor specialist has just added three types of control system to its portfolio: the convenient, high-end VARISPEED solution, the intelligent VARIPACK frequency inverters and the mechanical capacity control system CRII. Operators and builders of refrigeration systems can therefore choose the technology that best meets their needs. This boosts system efficiency, saves operating costs and preserves the environment.

VARIPACK – flexible and reliable

External VARIPACK frequency inverters are a flexible, simple and reliable solution. They communicate through the BEST software and adjust the cooling demand optimally to protect the compressors. This reduces the energy requirements whilst cutting costs. VARIPACK control systems are compatible with refrigeration systems, air-conditioning systems and heat pumps and can be integrated both in single compressors and in compound systems.

‘Developed especially for refrigeration technology and BITZER refrigeration compressors, the frequency inverters are compatible with all of our reciprocating compressors,’ says Tobias Hieble, Head of Electronic Application Engineering at BITZER. ‘VARIPACK capacity controls are exceptionally simple and safe to operate. They can be commissioned intuitively, greatly improve user-friendliness and can take over all of the regulatory functions of the refrigeration system. Users do not need to have any specific knowledge about inverters. The external frequency inverters have also been designed for modern motor concepts, including the permanent magnet motors of BITZER ECOLINE+ reciprocating compressors.’

VARIPACK capacity controls are exceptionally simple and safe to operate. They can be commissioned
intuitively, greatly improve userfriendliness and can take over all of the regulatory functions of the refrigeration system.

Tobias Hieble
Head of Electronic Application Engineering

Established and reliable – VARISPEED and CRII

Different specifications require diverse solutions. Along with its VARIPACK frequency inverters, BITZER always has the right technology to control individual systems with its two well-established capacity controls CRII and VARISPEED. The VARISPEED series is an entry-level frequency inverter solution for small and medium-sized reciprocating compressors – compact, safe and user-friendly. The suction gas-cooled VARISPEED frequency inverters and the compressors form a compact unit and all the components are factory mounted.

The CRII mechanical capacity control is the entry-level model to BITZER control technology and an inexpensive way of improving capacity control. BITZER has made decisive improvements to the previous version: the current solution boasts fewer control deviations and a much larger range of control. For example, the ECOLINE+ reciprocating compressor range can be used for CO2 applications with CRII. In this case, the capacity is regulated by the interplay between the mechanical control and the IQ module CM-RC-01. CRII regulates the range from 10 to 100 per cent practically seamlessly and allows for efficient adaptation of system output to meet actual needs.

Simple and reliable: BITZER VARIPACK frequency inverters

Einfach und sicher: BITZER VARIPACK Frequenzumrichter
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