By TEKO, published May 09, 2017

The use of parallel compression is a technology that has proven itself in the field. The total unit efficiency makes it useful for the operator (saving up to 20%). In combination with the Wurm control concept, it is checked during the operation of the unit whether the ECO-compression is an advantage. Depending on this, the feature is activated or not.


  • Interior and exterior installation
  • Flexibly selectable options
  • Modular installation of machine and medium pressure station
  • Capacity up to 350 kW
  • Medium temperature cooling, low temperature, cooling, heat pump, air conditioning feature, parallel compression, ejectors

Design Pressure

  • 30 (60*) bar suction line (low temperature)
  • 45 (60*) bar suction line (medium temperature)
  • 60 (80*) bar medium pressure
  • 120 bar high pressure side

* Optional at additional price

Completely mounted and tubed unit

  • Transcritical and subcritical CO2 reciprocating compressors by Bitzer or Frascold
  • Guide compressor with frequency converter
  • Ball stop valves
  • High and low pressure packages
  • Pressure Cut-Out for high pressure and safety pressure, non-adjustable, type tested per compressor
  • Safety valves for high/medium pressure and suction side (optional redundant)
  • Muffler for pulsation damping in the common discharge line
  • Insulation on suction side
  • Medium pressure receiver (165 L / 250 L / 2 x 165 L)
  • Sensor at the outlet of the gas cooler
  • Level controls
  • Insulation of the medium pressure vessel
  • Valve for post-injection
  • Stop valve after filter-drier and sight glass
  • Flash gas and suction gas heat exchanger (medium/low temperature cooling)
  • Active liquid subcooling
  • Subcooling plate heat exchanger for gas cooler (optional)
  • Antivibration pads
  • Manual bypass for oil separator for easy maintenance of the separator
  • Interior sound insulation (50 mm insulation)

Switchboard and control

  • Construction of switchboard according to DIN EN 60204; VDE 0113-1
  • Protection class IP20, voltage 400V/3Ph/50Hz
  • All switching devices which are necessary for fully automatic operation
  • Electric components are labelled according to German standards
  • Ventilation of the switchboard
  • Main switch
  • Control transformers
  • Switchboard with electronic control – Wurm Systeme
  • Independent power supply closes the high and medium pressure valves in case of power failure

Efficiency enhancement

  • Parallel compression
  • Ejectors
  • Suction line accumulator for flooded operation

Heating and air conditioning operation

  • Heat exchanger for hot and service water incl. charge pumps
  • Heat pump compressor
  • Air conditioning function


  • Commercial refrigeration

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