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Efficient and targeted rack cooling

The CyberRack Active Rear Door is a heat exchanger door with EC fans for installing on the rear door of server racks. The server rack door is swapped for the CyberRack Active Rear Door, which transforms the rack into an ac server rack that no longer discharges any heat load in the data center.
   

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Product Overview

At a glance Benefits Features Technical Data

Most important benefits

  • Suitable for any rack
  • The active heat exchanger doors can be used independently of existing precision air conditioning units, or can supplement them.
  • Maximum energy efficiency thanks to high rack inlet temperatures

Most important features

  • Less load on the room air conditioning, because the heat is discharged directly from the rack
  • Maintenance-friendly design

Most important technical data

  • Cooling capacity (kW): 18.8 – 32.3
  • Suitable for any rack
  • The active heat exchanger doors can be used independently of existing precision air conditioning units, or can supplement them.
  • For air conditioned server racks in data centers with and without raised floor
  • Maximum energy efficiency thanks to high rack inlet temperatures
  • Via the ac unit, the server rack becomes heat-neutral, as no warm return air is emitted


     
  • Return and supply air sensors ensure uniform temperature distribution under varying server load
  • EC fans for low electricity consumption
  • Targeted cooling of high-density racks
  • Less load on the room air conditioning, because the heat is discharged directly from the rack
  • For data centers with and without raised floor
  • Maintenance-friendly design

     
Cooling capacity (kW) 18.8 – 32.3
Airflow (m3/h) 4,800 – 6,000
Number of fans 4 – 5
Dimensions HxWxD (mm) 2,000 x 600 x 330
Cooling Systems Chilled water (CW)

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All details about CyberRack

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 or control: CyberRack Active Rear Door is a model of adaptability and can be precisely adapted to your individual requirements. In addition, a variety of options and equipment versions are available to achieve the optimum result.

Learn more about Climate. Customized.

Applications for ac server rack

Application 1: Autonomous CW cooling

  • Delivers all the cooling capacity the rack requires, with no need for additional precision air conditioning systems
  • Reliable cooling even without a raised floor
  • No warm return air in the IT room

Application 2: Supplementing the precision air conditioning

  • Pinpoint cooling of high-density racks
  • Prevents hot spots
  • Takes the strain off existing precision air conditioning units
  • No warm return air discharged into the IT room

     

Application 3: Increasing capacity

  • When your IT infrastructure grows, servers can be added as heat-neutral components
  • No need to purchase further precision air conditioning units
  • No additional warm return air in the IT room

Air conditioned server racks: Benefits

Flexibility

  • For cooling entire IT rooms and data centers without additional precision air conditioning units
  • Also suitable for supplementing existing precision air conditioning units
  • For rack-based servers both with and without integrated fans
  • Space-saving installation as a rack door with no structural changes to the data center
  • For data centers with and without raised floor
  • No need to separate hot and cold aisles
  • Individual adapter frames make them suitable for any rack

 

Efficiency

  • Maximum energy efficiency when ac server racks are combined with chillers with Free Cooling function: as the servers are cooled directly in the server rack, high water temperatures are possible, considerably increasing the number of operating hours with Free Cooling
  • EC fans for maximum energy efficiency
  • The server rack becomes heat-neutral, as no warm return air is emitted
  • Sensors for measuring return air and supply air temperatures: precisely air-conditioned server racks even with fluctuating server loads

     

Operational reliability

  • Redundant power supply for maintaining the air supply if mains electricity fails
  • To protect the server's own fans from excess pressure, the optional differential pressure con-trol from STULZ adapts the speed of the CyberRack fans in line with the server airflow
  • If an EC fan drops out, the speed of the remaining fans increases
  • The EC fans can be replaced during operation if necessary
  • C2020 for controlling and monitoring the air conditioning system
  • Maintenance-friendly design
     

Design and sizes

Compact design

  • Less than 300 mm additional rack depth
  • No need to reposition the server racks
  • The servers can retain all the height units in the rack

Individual adapter frames make them suitable for any rack. They are available in 2 different heights and 2 different widths (42U and 48U, and 600 mm and 800 mm). Once the rack door has been replaced by the adapter frame, the CyberRack unit can be hung in the adapter frame and connected to the chilled water supply.

No mixing of hot and cold air

CyberRack Active Rear Door units are installed on the rear of the rack. The active heat exchanger doors cool the server right at the source and prevent heated air from entering the room (see illustrations below).

Integration with CyberCool 2

Solutions from STULZ are perfectly coordinated to work together, to cool your IT systems efficiently and reliably. The CyberRack unit works most efficiently in combination with the CyberCool 2 chiller.

Investments in the quality, reliability and efficiency of STULZ air conditioning and chilled water solutions pays off during operation after just a short runtime thanks to energy savings and operational reliability.

CyberCool 2 product information
 

Control and monitoring

  • C2020 controller for controlling and monitoring the air conditioning system
  • Active temperature control: The controller regulates the fan speed in accordance with the measured supply and return air values.
  • Direct connection to BMS systems via ModBus RTU protocol or Ethernet
              
     

Options

Thanks to the diverse options and equipment options available, you can perfectly adapt the CyberRack Active Rear Door to your particular requirements regarding air conditioned server racks.

  • Adapter frames for 42U and 48U racks with a width of 600 or 800 mm
  • Differential pressure control for protecting the server rack fans against  overpressure
  • 2 or 3-way CW valves, also available as a pressure independent 2-way PICV
  • Cooling capacity display
  • Air temperature and humidity sensor
  • Supply water temperature sensor
  • Water warning system incl. sensor
  • Flexible connection hoses

Pressure independent control valve

The pressure independent control valve (PICV) combines the functions of control, hydraulic compensation and flowrate measurement. The water flowrate required for cooling is set directly by the CyberRack control system.

  • Low water-side pressure drops cut pump energy costs
  • Lower investment and installation costs and faster start-up thanks to automatic hydraulic compensation
  • The defined water flowrate ensures stable and precise control in all load states
  • The cooling capacity of each individual server rack is recorded
     

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

AC server racks: Test Center

In our state-of-the-art, 700-square-meter Test Center with its various climate chambers, we can perform a variety of tests on precision air conditioning units and chillers. During the development of the CyberRack Active Rear Door, we were able to test and optimize it under all climatic conditions encountered around the world.

In addition, we offer you the opportunity to book a witness test for server rack ac units in our Test Center. This allows you to have the desired air conditioning system tested according to your exact specifications, creating transparency and providing you with information about your system’s performance and energy consumption.

Learn more about our Test Centers

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Andorra United Arab Emirates Afghanistan Antigua and Barbuda Anguilla Albania Armenia Angola Antarctica Argentina American Samoa Austria Australia Aruba Azerbaijan Bosnia and Herzegovina Barbados Bangladesh Belgium Burkina Faso Bulgaria Bahrain Burundi Benin Bermuda Brunei Bolivia Brazil The Bahamas Bhutan Bouvet Island Botswana Belarus Belize Canada Cocos (Keeling) Islands Congo Central African Republic Congo-Brazzaville Switzerland Côte d’Ivoire Cook Islands Chile Cameroon China Colombia Costa Rica Cuba Cape Verde Christmas Island Cyprus Czech Republic Germany Djibouti Denmark Dominica Dominican Republic Algeria Ecuador Estonia Egypt Western Sahara Eritrea Spain Ethiopia Finland Fiji Falkland Islands Micronesia Faroes France Gabon United Kingdom Grenada Georgia French Guiana Ghana Gibraltar Greenland Gambia Guinea Guadeloupe Equatorial Guinea Greece South Georgia and the South Sandwich Islands Guatemala Guam Guinea-Bissau Guyana Hong Kong SAR of China Honduras Croatia Haiti Hungary Indonesia Ireland Israel India British Indian Ocean Territory Iraq Iran Iceland Italy Jamaica Jordan Japan Kenya Kyrgyzstan Cambodia Kiribati Comoros Saint Kitts and Nevis North Korea South Korea Kuwait Cayman Islands Kazakhstan Laos Lebanon Saint Lucia Liechtenstein Sri Lanka Liberia Lesotho Lithuania Luxembourg Latvia Libya Morocco Monaco Moldova Madagascar Marshall Islands North Macedonia Mali Myanmar Mongolia Macao SAR of China Northern Marianas Martinique Mauritania Montserrat Malta Mauritius Maldives Malawi Mexico Malaysia Mozambique Namibia New Caledonia Niger Norfolk Island Nigeria Nicaragua Netherlands Norway Nepal Nauru Niue New Zealand Oman Panama Peru French Polynesia Papua New Guinea Philippines Pakistan Poland Saint Pierre and Miquelon Pitcairn Islands Puerto Rico Portugal Palau Paraguay Qatar Reunion Romania Russia Rwanda Saudi Arabia Solomon Islands Seychelles Sudan Sweden Singapore Saint Helena, Ascension and Tristan da Cunha Slovenia Svalbard Slovakia Sierra Leone San Marino Senegal Somalia Suriname São Tomé e Príncipe El Salvador Syria Eswatini Turks and Caicos Islands Chad French Southern Territories Togo Thailand Tajikistan Tokelau Turkmenistan Tunisia Tonga Timor-Leste Turkey Trinidad and Tobago Tuvalu Taiwan Tanzania Ukraine Uganda United States Minor Outlying Islands United States Uruguay Uzbekistan Vatican City Saint Vincent and the Grenadines Venezuela British Virgin Islands US Virgin Islands Vietnam Vanuatu Wallis and Futuna Samoa Yemen Mayotte South Africa Zambia Zimbabwe Palestine Åland Heard Island and McDonald Islands Montenegro Serbia Jersey Guernsey Isle of Man Saint Martin Saint Barthélemy Bonaire, Sint Eustatius and Saba Curaçao Sint Maarten South Sudan Kosovo
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