Reciprocating compressors

If a BITZER compressor is no longer available, it can often be easily replaced by a current model. The most common cases are compiled in the Technical Information AT-310.
(last revision: 05.2025)

For flexibility in system design, BITZER products are available with a variety of different connections and shut-off valves. The available bushes, flanges, shut.off valves etc. are listed in the Technical Information AT-320. This document also explains which pipe fits which brazing or welding connection.
(last revision: 05.2025)

Capacity control with VARISTEP and the CM-RC enables a high switching frequency of the solenoid valves for capacity control (blocked suction) between 10% and 100%. This ensures that the controlled values, temperature and pressure fluctuate only little. Together with the wider capacity control range, this increases the efficiency of the systems.
The control characteristic for the optimum control of the solenoid valves is stored in the CM-RC, you only specify the set point in the form of a 0 .. 10V signal or a Modbus value.
For details see Technical information documents KT-240 (IQ MODULE CM-RC) and CT-310 (Modbus).
(last revision: 05.2025)

This is made possible by a newly developed "limiter function" of the IQ MODULE CM-RC for oil and motor temperature: Only when the operating temperature makes it necessary, and only for as long as necessary, the module increases the power of the compressor. This can be necessary especially at high pressure conditions and long operation with low load.
For details on the IQ MODULE CM-RC see Technical information KT-240.
(last revision: 05.2025)

The operating time is not fixed. It depends on the operating conditions and the operation of the compressor in the last 15 min. The hotter the compressor, the shorter the possible operation at 10%.
For details on the IQ MODULE CM-RC see Technical information KT-240.
(last revision: 05.2025)

BITZER products are equipped or available with different oil monitoring systems. The available devices and options are listed in the Technical Information AT-170.
(last revision: 05.2025)

The Performance Kits have been specially developed for already installed compressors in order to utilise the advantages of the BITZER IQ MODULE (CM-RC-02) for retrofit in existing systems. The three kits can be used to retrofit various applications in order to increase efficiency, avoid downtime and visualise data. All this with minimal effort for the existing electrical cabling – further upgrades are possible at any time.
(last revision: 09.2025)

For all semi-hermetic ECOLINE reciprocating compressors for HFC and HFO refrigerants as well as for ECOLINE PRO compressors for hydrocarbon refrigerants.
Retrofit for ECOLINE P compressors (order date until Nov. 2024) on request.
(last revision: 09.2025)

- Connectivity Kit: Contains CM-RC-02. Introduction to intelligent compactor protection with data recording and visualisation.
- Safety Kit: Contains CM-RC-02, oil heater, discharge gas temperature sensor, oil monitoring. For reliable oil management and optimum operational safety.
- Energy Kit: Contains CM-RC-02, extension board CM-IO-B, discharge gas temperature sensor, pressure transmitter and (depending on the compressor) two or three VARISTEP capacity regulators for mechanical capacity regulation. This allows for significantly higher efficiency in part load operation, i.e. lower energy consumption and higher COP/EER.
(last revision: 09.2025)

The retrofitting of the Performance Kits is described in the video tutorial KW-242. It also explains how to first remove the existing compressor protection device, install the CM-RC-02 compressor module and peripheral devices, and connect them to the BEST SOFTWARE. This requires BEST SOFTWARE version 2.21, which is available for download free of charge.
(last revision: 09.2025)