STULZ Explorer

Cooling for mission critical systems

STULZ has added to its chiller range with the liquid-cooled EXPLORER WSW. With the state-of-the-art design of the water-cooled chiller, featuring an electronic expansion valve, microprocessor control and infinitely adjustable power control, STULZ has once again demonstrated its expertise in liquid cooling systems. 

Solutions for STULZ Explorer WSW

  • Data Centers

  • Industrial Process Cooling

  • Facilities such as hotels, office buildings, shopping malls, hospitals etc.

Technical Data

Cooling capacity total (kW)

230 - 1,530




R134a (GWP: 1,430)

R513 (GWP: 573)




  • Compact design

    The Explorer offers maximum cooling capacity with a minimal footprint.

  • Reliability

    High-quality components with easy access for maintenance purposes

  • Innovative control

    STULZ's own control system with 7" touch display enables the STULZ Explorer to be perfectly integrated in existing systems.

  • Standardized components

    By using components that are commonly found on the market, rapid availability of spare parts is guaranteed.

  • End-of-line test

    An end-of-line test and factory parameter setting ensures easy commissioning and cuts installation costs.

  • Sustainability

    The direct evaporator minimizes refrigerant quantities and so helps conserve the environment.

  • ERP compliance

    This product meets the efficiency values according to ErP 2018

  • Natascha Meyer, Product Manager

    "The water-cooled Explorer rounds off the chiller range. As a result, STULZ is able to offer exactly the right solution to meet a wide range of different requirements."


Explorer with Screw compressors

  • Cooling capacity from approx. 230 to 1,530 kW

  • Refrigerant R134a

  • Constant-speed screws combined with dry-expanding evaporators

  • Single or dual circuit chiller versions

  • 16 sizes

  • Available in standard and quiet design variants


  • Generously proportioned switch gear cabinet

  • In-cabinet socket for easy service access

  • Easy installation and machine connection thanks to Victaulic connectors

  • Electronic expansion valve as standard, controlled by the STULZ C2020

  • Use of pipe bending machines to avoid single points of failure (SPOF)


Control and monitoring  

  • C2020 controller
  • Touchscreen in two different sizes
  • Adaptation to customer specific requirements
  • Sequencing for runtime compensation
  • Integrated control of up to 6 units
  • Various languages available for selection
  • Intuitive navigation
  • On/Off switch and reset
  • ...20 mA for setpoint
  • Ethernet

Efficiency challenging the future: ErP 2018 ready

The European Regulation 5539/16. known as ErP 2018, sets the new SEPR parameters for assessing the energy efficiency of chillers. The entire Explorer range complies with the limits required by ErP 2018. 


  • E.E.R.: Energy Efficiency Ratio
    Chiller efficiency at a certain condition.


  • E.S.E.E.R.: European Seasonal Energy Efficiency Ratio
    Seasonal efficiency of a chiller for comfort: ambient air from 25 to 35°C


  • S.E.P.R.: Seasonal Energy Performance Ratio
    Evaluates the load and temperature variations during the year,
    relative to the chiller's electricity consumption.

Parameters for high-temperature process cooling chillers (reg. 5539/16):



STULZ Chiller Range

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Contact us

Holsteiner Chaussee 283
22457 Hamburg 

Central Office: +49 40-5585-0
Fax: +49 40-5585-352

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