Explorer WSW

Explorer WSW

Water cooled chiller for mission critical systems

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Maximum flexibility by broad operating range

The state-of-the-art design of the water-cooled chiller system, featuring an electronic expansion valve, microprocessor control and infinitely adjustable power control, once again demonstrated STULZ's expertise in liquid cooling devices.

Optimized for process and industrial cooling
Data Center
Data Center
Our units are designed for highest requirements and maximum reliability
Free Cooling
Free Cooling
Maximum potential savings by using cool outside air
Microchannel technology
Microchannel technology
Equipped with condensers for particularly small refrigerant quantities and low air-side pressure drops

Product Overview

At a glance

Most important benefits

  • Compact design: The Explorer offers maximum cooling capacity with a minimal footprint.
  • Reliability: High-quality components with easy access for maintenance purposes

Most important features

  • Single or dual circuit chiller versions
  • 16 sizes

Most important technical data

  • Cooling capacity (kW) 230 – 1,530
  • 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 for the water-cooled chiller system 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.
  • 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)
Technical Data
Cooling capacity total (kW) 230 – 1,530
Sizes 16
Dimensions Lenght (mm): 3,010 – 5,390
Depth (mm): 1,340 – 1,931
Height (mm): 1,880 – 2,165
Refrigerants R134a (GWP: 1,430)
R513 (GWP: 573)

All details about Explorer WSW

Climate. Customized.

From standard units to fully customized solutions

The ability to offer such a wide range to customers is the embodiment of our philosophy, "Climate. Customized.". Size, design, cooling capacity or control: STULZ’s Explorer WSW can be precisely adapted to your individual requirements. In addition, a variety of options and equipment are available for the water-cooled chiller system to achieve the optimum result.

Learn more about Climate. Customized.

Solutions for STULZ Explorer WSW
  • Data Centers
  • Industrial Process Cooling
  • Facilities such as hotels, office buildings, shopping malls, hospitals etc.

Water-cooled chiller system: 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
Free Cooling with CyberCool Free Cooling Booster

Free Cooling is an intelligent solution for minimizing energy-intensive compressor mode and significantly cutting operating costs. Equipped with an additional Free Cooling module, Explorer WSW uses the outside temperature, which offers the greatest potential for savings, especially in cold and temperate climates.

Without complex and extensive planning, the Free Cooling module can be easily integrated and connected to the piping via a Victaulic connection. Thanks to its own control cabinet including SEC.blue controller, optimum control and trouble-free communication with the Explorer WSW are ensured.

Product information CyberCool Free Cooling Booster


Advantages at a glance

  • Significant energy savings thanks to Free Cooling including Mixed mode
  • Low commissioning times and installation costs thanks to plug-and-play principle
  • High reliability thanks to redundancy concept and high-quality components
  • With or without glycol in the consumer circuit
  • Maintenance-friendly design: less stress on mechanical parts, therefore lower maintenance costs and long service life
  • Energy-saving, variable speed pumps
  • Both indoor and outdoor installation possible

Savings up to 127,867 € a year with CyberCool Free Cooling Booster


With Free CoolingWithout Free Cooling
Energy consumption1,380,025 kWh2,232,472 kWh
Energy costs207,004 €334,871 €
Savings per year127,867 €


Energy consumption using the example of a system with WSW360 chiller, WFM04 Free Cooling Booster and 2xEHLD1F 1267E dry coolers; operating temperature:18/12 °C; based on the temperature profile of the city of Hamburg, 0.15 €/kWh

Service and maintenance

As a company with locations across the globe, we offer everything you need in the extremely dynamic world of information technology - plus professional advice in the right place at the right time.

Our trained and experienced sales and service partners are located in over 140 countries. The resulting proximity to our customers allows fast response times. In addition, regular training courses and an active exchange of information ensure high quality and an extensive knowledge of all our products. This way, you can be sure your products are in the best hands and get the right maintenance – all over the world.

Locations worldwide


Test Center

At our test center, you can have Explorer WSW units tested under your individual operating and site conditions. This creates transparency and confirms the water cooled chiller’s performance and energy consumption.


Find your individual STULZ contact

Need more information?

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Do you have any questions? We will be happy to help! Please call us or follow our contact form.

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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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