Cooling and Installation Configurations

The requirements for a cooling system vary hugely depending on the location and climate zone. With four basic configurations and many options available, we can offer the right solution for every project requirement in virtually every climate zone.

Operating Modes

The special construction with its extremely efficient combination of Free Cooling and evaporative cooling reduces energy costs. The system has been optimized to such an extent that in most regions, 100% mechanical cooling is no longer necessary. pPUE values as low as 1.02 can be achieved.

Dry Mode: At low outside temperatures, hot air from the data center is cooled down by the cold outside air via the plate heat exchanger.

Wet Mode: When the outside temperature is moderate, the outside air is precooled by the adiabatic system before passing through the heat exchanger, where it cools down the air from data center.

Top-Up Mode: At very high outside temperatures, a compressor refrigeration system is used in addition to the adiabatic system to provide top-up cooling.

"Dry Mode" (Free Cooling only):
Adiabatics OFF
Mechanical Cooling OFF

"Wet Mode" (Adiabatic):
Adiabatics ON
Mechanical Cooling OFF

"Top-Up Mode" (Mix Mode):
Adiabatics ON
Mechanical Cooling ON

Standard version with dry mode and wet mode

Indirect evaporative Free Cooling

The largest mechanical component in the CyberHandler 2 is the air to air heat exchanger. Outside air is used to cool the hot air from the data center inside the heat exchanger. The two cooling air patterns are kept entirely separate from one another.

Adiabatic cooling of the outside air also takes place inside the heat exchanger. Nozzles spray water directly onto the heat exchanger to pre-cool the air. This increases the number of Free Cooling hours. Mechanical cooling is not necessary, even at higher temperatures.

Configuration with top-up mode

Indirect evaporative Free Cooling with additional integrated DX cooling system


In very hot local climates, the system is supplemented with additional DX cooling. The complete DX system with compressor, evaporator, and condenser is also housed inside the unit. The solution enables up to 30% of the required cooling to be achieved with mechanical means, making the system compatible for use in virtually any local climate.

Redundant cooling configurations

Indirect evaporative Free Cooling with redundant DX cooling system

In this configuration, the CyberHandler 2 is connected to an external DX outdoor unit which can potentially generate 100% mechanical cooling capacity.

Indirect evaporative Free Cooling with additional chiller

The adiabatic cooling system is connected to a chiller to provide additional mechanical cooling capacity. If necessary, the chiller can generate all of the necessary cooling capacity.

Redundant cooling configuration for even greater independence

These days, extreme climate conditions characterized by significant temperature fluctuations and hot spells are an ever more frequent occurrence in various regions. If adiabatic cooling is not sufficient, the system has to be combined with a solution that is 100% independent of weather conditions in isolated cases. Liquid cooling systems with chillers and DX heat exchanger systems have proved to be an excellent solution in situations like this.


Installation Configurations

Our high-performance air handling units are positioned directly on or next to the building. All the necessary chilling components are integrated in the units' housing, saving floor space in the data center and facilitating maintenance, as the service engineers no longer need to enter the data center. 

Wall: Installation next to the building

Supply air and exhaust air are routed through the air handling unit horizontally.

The supply air duct can be either connected to an existing raised floor or routed directly into the data center. The return air is fed out of the data center directly into the CyberHandler 2.

This type of installation is particularly suitable for data centers where space is not restricted.

Roof: Installation on the building

The air is conducted through the ceiling of the rooms into the CyberHandler 2. No additional air ducts are needed outdoors for connection. By cleverly locating them on the roof, plus a few minor structural measures, the units can easily be made invisible, which has a dual benefit.

Firstly, units installed on the roof have fewer points of contact with the environment and will always generate less noise pollution. Secondly, data centers are high-security areas, and roof installation makes sabotage more difficult. This kind of installation is especially suitable for data centers in residential and mixed-use areas.

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