Swegon Germany GmbH

Econdition Zeta Rev Ei

Highly efficient chiller with infinitely variable speed control

High efficiency chillers with inverter controlled scroll compressors.


  • SEi: Inverter version with intelligent efficiency
  • HEi: High efficiency inverter version

Special properties

  • Brushless, DC inverter controlled scroll compressor, also in combination with conventional scroll compressors
  • Eurovent Class A
  • Night shift function with quiet night operation
  • Modern control unit with integrated web server
  • Multilogic function for multi-unit systems
  • Integrated water modules also with a reserve tank
  • WISE WATER (accessory), variable flow control of the primary circuit with inverter-controlled pumps on user side
  • Free cooling control (accessory)

DC inverter scroll compressor Depending on the requirements, one, two or three scroll compressors are installed in the different model versions, one of which is a brushless DC inverter compressor. This alone saves up to 12% energy annually compared to standard scroll compressors.

Additional advantages:

  • High energy efficiency with partial load operation
  • Higher cooling capacities at maximum load
  • More precise temperature control


Power range: Cooling: 30 - 90 kW

Product advantages:

  • Infinitely variable power control, through compressor speed control
  • Energy efficiency class A according to EUROVENT
  • Microchannel heat exchanger for small amounts of refrigerant
  • Sliding free cooling control for external free cooler
  • Efficient EC fans
  • Buffer tank and/or pump(s) can be integrated
  • Efficient speed control of the consumer pump
  • Master/slave control (also with non-speed controlled units)
  • web server
  • BlueThink © Systems & Controls
  • EKODESIGN-compliant Models (versions): SEi: High-performance chiller with stepless speed control HEi: Effi ciency-enhanced high-performance chiller with stepless speed control

Know-How Article

Efficiency Guide for chillers and heat pumps

With its regulations, the ECODESIGN directive sets new, challenging standards for more efficient use of energy. This also applies to chillers and heat pumps in the European market.