Introduction

Many Bitzer compressors that are no longer available can be replaced with current ones. This document lists the most common former models with their current alternatives. The compressor model can be read off the name plate (Explanation of model designations).

When decommissioning the old compressor and installing the new one, it is essential to observe the relevant operating instructions!

Many former compressor models are also listed in the Bitzer Software: search for "Compressor model" under "Compressor selection" and check the box "incl. former types". The software also lists technical data, dimensions and connections of the former models, so that they can be compared to the current ones.

Residual risks

The products, electronic accessories and further system components may present unavoidable residual risks. Therefore, any person working on it must carefully read this document! The following are mandatory:

  • relevant safety regulations and standards
  • generally accepted safety rules
  • EU directives
  • national regulations and safety standards

Depending on the country, different standards are applied when installing the product, for example: EN378, EN60204, EN60335, EN ISO14120, ISO5149, IEC60204, IEC60335, ASHRAE 15, NEC, UL standards.

Authorized staff

All work done on the products and the systems in which they are or will be installed may only be performed by qualified and authorised staff who have been trained and instructed in all work. The qualification and competence of the qualified staff must correspond to the local regulations and guidelines.

In addition to the safety references listed in this document, it is essential to observe the references and residual risks in the respective operating instructions!

To be observed when mounting or replacing the compressor

The system is under pressure!
warning

The system is under pressure!

Serious injuries are possible.

Wear safety goggles!

Before any intervention in the compressor, assess the risk of the conversion and take appropriate measures, e.g.: wear additional personal protective equipment, shut down the system or shut off valves upstream and downstream of the relevant part of the system and depressurise. Before restarting the compressor, check it for pressure strength and tightness (or only for tightness, depending on the risk assessed).

Tightening torques for screwed connections:

Accessories

Which accessories (e.g. fan, capacity controller, protection device) can be re-used when replacing a compressor can only be specified reliably in the individual case. It is often possible e.g. with scroll compressors of the same size, but not with Varispeed reciprocating compressors: here, the former centrifugal lubrication has been replaced by oil pumps in the current models. Even if the old accessories are physically compatible with the new compressor, they may not be fully functional or may be less efficient. Bitzer therefore recommends to use old accessories only after consultation. For suitable spare parts see also ePARTS Software

If a defective compressor is replaced by a new compressor with a different housing size in an existing compound system, an active oil regulation system is required due to the different crankcase pressures.