CyberCool Explorer WS
The optimal solution for mission-critical IT applications
CyberCool Explorer WS chillers are specifically designed to meet the cooling needs of data centers. These units are ideal for a range of cooling capacity from 280 to 1,860 kW. The units are designed to operate at very high water temperatures, up to +32 °C at the inlet and +25 °C at the outlet. Thanks to this, the integrated Free Cooling can operate for most of the year, ensuring exceptional energy savings.
Product Overview
Most important benefits
- Designed for maximum efficiency in both peak and part load conditions and ErP2021 - SEPR HT (EU) 2016/2281 compliant.
- Flexibility: wide range of options/accessories; different condensers (microchannels/finned tube)
Most important features
- Total resistance to weathering and corrosion, suitable for outdoor installation
- Screw compressor in stepless configuration (WSA) or integrated frequency converter (WSI)
Most important technical data
- Cooling capacity (kW): 280 - 1,860
- Refrigerants: R1234ze (GWP: 7), R513A (GWP: 573)
- Designed for maximum efficiency in both peak and part load conditions and ErP2021 - SEPR HT (EU) 2016/2281 compliant.
- Reduced environmental impact: low-GWP refrigerants to reduce greenhouse effect
- Flexibility: wide range of options/accessories; different condensers (microchannels/finned tube)
- Modularity: designed as a multi-functional chiller platform suitable to be the basis for the development of more chiller ranges 200 kW to 1,800 kW
- Enhanced Free Cooling performance
- Extension of operating limits
- Reduction of the units footprint
- Total resistance to weathering and corrosion, suitable for outdoor installation
- Screw compressor in stepless configuration (WSA) or integrated frequency converter (WSI)
- Optimized refrigerant circuit with electronic expansion valve and sub-cooling economizer
- High efficiency MCHE condensers & reduced refrigerant charge
- Built in hydronic modules
- Variable speed fans
| WSA | WSI | |
| Cooling capacity total (kW) | 178 - 1,451 | 215 - 1,265 |
| Dimensions | Width (mm): 1,140 - 2,280 Depth (mm): 4,330 - 13,330 Height (mm): 2,485 | Width (mm): 1,140 - 2,280 Depth (mm): 4,330 - 11,830 Height (mm): 2,485 |
| Refrigerants | R513A (GWP: 573), R1234ze (GWP: 7) | R1234ze (GWP: 573) |
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All details about CyberCool Explorer WS
WSA and WSI versions
CyberCool Explorer WS chillers are available as standard units (WSA) and with inverter-driven screw compressors (WSI). Both versions are optimized for low GWP eco-friendly refrigerants (WSA: R513A and R1234ze, WSI: R1234ze).
Maximum operational reliability
CyberCool Explorer WS units are designed for 24/7 operation, 365 days a year. During development and design, the focus was on maximum reliability. This not only guarantees the chiller’s problem-free condition during transport on the road or in a container, it also ensures reliable operation over many years.
The chiller can be adapted to different thermal loads via the refrigerant circuit with screw compressors including output slider. Continuity and reliability of cooling are key factors, ensured by a comprehensive range of options and features that maximize uptime in the event of an emergency, such as Quick Start, Automatic Transfer Switch and Emergency Cooling. The arrangement of the components allows easy maintenance.
Energy efficiency
CyberCool Explorer WS units are designed for maximum efficiency in both peak and part load conditions and are ErP2021 - SEPR HT (EU) 2016/2281 compliant.
This is achieved by:
- Increased heat exchange surface area of evaporators and microchannel condensers
- Economizer heat exchangers
- Inverter technology on the compressor, EC fans and VSD pumps
- Maximized Free Cooling coils, which use outside air as the primary cooling source, allowing pure Free Cooling operation even around +10 °C.
Optimized for IT applications
With maximum water temperatures of +32 °C inlet and +25 °C outlet, the unit offers a high capacity/footprint ratio and EER efficiency. This results in improved unit CAPEX and OPEX.
Extended operating limits
Thanks to specific versions and accessories, CyberCool Explorer WS can be installed in very cold and hot climates worldwide.
WSA (R513A, R1234ze)
With WSA units, full-load operation is guaranteed from -20 °C up to +48 °C outside air temperature for standard and Free Cooling versions. A Free Cooling version suitable for operation down to -40 °C is also available.
WSI (R1234ze)
With the WSI units, full-load operation is guaranteed from -20 °C up to +45 °C outside air temperature for standard and Free Cooling versions.
Suitable for any critical structure
The wide range of configurations and numerous options available make the CyberCool Explorer WS the ideal solution to meet the diverse needs of critical infrastructures.
LN - Low Noise Version
For the quietest operation without compromising performance. Compressors are installed in a metal box, which is acoustically insulated with sound-absorbing foam rubber.
HT - High Temperature Version
Energy efficiency is a key parameter in data centers. This is achieved with cooling systems that operate at high water temperatures. The HT version is designed to cool liquids from +15 °C to +25 °C and includes:
• special evaporator and expansion valves
• units with R513A refrigerant feature special compressors optimized for high temperature working conditions
LT - Low Ambient Temperature Chiller Version
Suitable for cold climates, this version includes brushless EC fans and an insulated and heated compressor compartment as standard. The additional condensing pressure control system allows the chiller to operate in ambient temperatures as low as -20 °C.
Maximum configurability plays a crucial role in today’s critical infrastructures, and in this context the wide range of options and accessories available for the WSA and WSI units enables an extremely diverse range of application requirements to be met.
- Quick Start: QUICK START is available for all CyberCool Explorer WS units as an option and ensures that the required cooling capacity is restored in approximately 105 seconds (WSA/WSF) or 157 seconds (WSI/WSJ) after the power supply is restored.
- Automatic Transfer Switch (ATS): In situations where there is an interruption in the power supply from the main line, the ATS automatically switches to the backup line, minimizing the interruption of the unit’s power supply. The ATS controls the eventual restoration of the primary power supply for complete redundancy without a single point of failure as per TIER recommendations.
- Energy Meter: The Energy Meter option allows the unit’s electricity consumption to be monitored and the data to be transmitted to energy metering systems to control the efficiency of IT systems (PUE - Power Usage Effectiveness).
- Further options and accessories: The CyberCool Explorer WS is available with a broad range of options and accessories such as soft starter, hydronic modules, electronic flow switch, fin and tube condensers (Cu/Al), anti-intrusion grills etc. Contact us to learn more about it.
Single and Dual circuit units
Depending on the model, CyberCool Explorer WS units are equipped with one or two refrigeration circuits. Both evaporator models are protected against freezing and have Victaulic® connections for quick installation.
Single-circuit units feature a brazed plate evaporator designed to maximize the heat exchange coefficient with minimal pressure drops.
Dual-circuit units are equipped with a dry expansion single pass shell-and-tube evaporator. Copper tubes are internally grooved to ensure high heat exchange and are inspectable for easy maintenance.
Free Cooling
In data centers, where cooling demand is constant throughout the year, Free Cooling technology offers the greatest potential for energy savings, especially in cold and temperate climates.
Both WSA and WSI units offer Free Cooling and can operate in environments down to -20 °C (-40 °C available as an option) thanks to three different operating modes: Free Cooling mode, Mixed mode and Compressor mode (DX). These are automatically selected by the SEC.blue controller based on the ambient air and operating water temperatures. Sec.blue logic controls the water valves to maximize heat exchange with the environment in Free Cooling.
Illustration right: Graph of annual operating hours in different operating modes
(Compressor mode (DX), Mixed mode, Free Cooling mode):
• WSJ563 unit operating 24H/365
• Nominal cooling capacity 1,646 kW
• Water temperature (in/out) 32 °C / 20 °C
• Ambient temperature + 35 °C
• Location: Berlin
Compressor mode (DX)
When the ambient temperature is higher than the water inlet temperature, the Free Cooling circuit is excluded. The water is completely cooled by the compressors in the refrigerant circuits.
Mixed mode
When the ambient temperature falls below the inlet water temperature, the water is diverted through the Free Cooling exchangers, which provide part of the required cooling capacity. At this stage, the power absorbed by the compressors is reduced.
Free Cooling mode
When the ambient temperature is approximately 10K lower than the supply temperature, the Free Cooling circuit can provide all the cooling capacity required by the user. The compressors are switched off and only the fans are active. This significantly reduces energy consumption and minimizes running costs.
Full inverter versions
The WSI units with inverter-driven screw compressors are available with and without Free Cooling. The units combine the advantages of inverter technology with the benefits of the environmentally friendly HFO refrigerant R1234ze.
The use of inverter technology for compressors, fans and pumps maximizes the energy efficiency of these units. Inverter-driven screw compressors improve efficiency especially at part loads and in Mixed mode operation, resulting in significant annual energy savings of up to 15% compared to traditional solutions.
Inverter screw compressors
These semi-hermetic screw compressors feature an integrated frequency converter that adjusts the cooling capacity of each compressor from 25% to 100%. In dual-circuit units the minimum total control step is 12.5%. The variation of the Vi compressor ratio by means of a cassette valve, combined with the reduction of the speed, allows the energy efficiency of the unit to be maximized under all operating conditions.
Optimized energy efficiency levels
WSI units are designed to ensure both maximum efficiency under peak conditions and optimized consumption under partial loads. They are therefore the ideal solution for chilled water cooling in data centers.
Low inrush current
Inverter technology in screw compressors ensures a low start-up inrush current, which not only reduces stress on mechanical components and preserves the electric motor, but also reduces peak loads on the local electrical infrastructure.
Ready for any worldwide regulation and directive
The use of new-generation environmentally friendly refrigerants such as R513A (GWP=573) and R1234ze (GWP=7) enables WSA/WSI units to comply with the main European and international standards, which regulate the use of refrigerant gases according to their impact on the greenhouse effect (GWP Global Warming Potential). All WSA/WSI units comply with both the newly revised European F-gas regulation which, from 2027, will prohibit the use of refrigerants with a GWP greater than 750 for chillers with a rated output of more than 12 kW, and with the US AIM Act which, from 2025/26, will prohibit the use of refrigerant gases with a GWP greater than 700 for chillers.
| Medium pressure | R134a | R513A | R123Aze |
| Flammability* | A1 - NOT flammable | A1 - NOT flammable | A2L - MILDLY flammable |
| Toxicity* | Lower (A) | Lower (A) | Lower (A) |
| GWP** | 1430 | 573 | 7 |
| ODP** | 0 | 0 | 0 |
| Atmospheric lifetime | 13.4 years | 5.9 years | 16 days |
* ASHRAE 34-ISO 817 **IPCAR4
Control and monitoring
The SEC.blue programmable microprocessor controller allows optimal operation of both the refrigeration and hydronic circuits. It is flexible and easy to use.
- Adaptation
Proprietary operating system with project specific software adaptation.
- Sequencing
Sequencing management of up to 10 chillers in 5 different work zones and managed as a single unit, for maximum system efficiency.
- Redundancy
If one of the sequenced chillers fails, a backup unit is automatically activated to ensure service continuity.
- Emergency cooling
When cooling capacity of the active chiller in a defined work area is insufficient, the emergency cooling function activates the other chillers in sequence.
- Monitoring
SEC.blue has an on-board Ethernet port for communication with the main Internet protocols and remote software update. It also features an RS485 port for communication via ModBus RTU and an integrated web page, with data log and alarm sending by e-mail.
- Touch display
7” touch screen display for simple access to the chiller status and settings.
- Measurement and display
Measurement and display of process fluid inlet/outlet temperatures and ambient temperature.
- Demand limit function
Allows the power consumption to be limited.
- Unloading function
To keep the unit running even at high ambient temperatures
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
