Close control systems

  • Overview
  • Documents
  • Related products
  • Related solutions
  • Learning
  • Case studies
  • News
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Reliable and energy-efficient solutions for CRAC /close control units 

New energy and performance standards and low PUE targets in data centers, server rooms, and communication networks require Computer Room Air Conditioners (CRAC) with precise control to achieve high reliability, better humidity, and temperature settings as well as part-load efficiency. Ensure the cooling of your data server room will enable your business to perform at peak even with higher evaporating temperatures.

Precision air conditioning in data centers

Such cooling units need to operate reliably and provide cooling in both compressor and free cooling modes. The maintenance of stable temperatures and humidity is a key design challenge in these applications since they are used in environments where ambient temperatures often vary significantly during the day.

Danfoss microchannel heat exchangers (MCHE), scrolls with IDVs and inverter compressors, sensors, controllers, and electronic stepper motor valves let you adjust to temperature and load fluctuations to create cooling systems that safeguard these sensitive technologies while potentially reducing refrigerant charges. Our solutions include options for lower-GWP refrigerants. All of these backed up by Danfoss’s excellent technical support from our expert teams.

Features and benefits

All you need in one place, delivered by highly experienced air conditioning experts

Precise temperature control to safeguard sensitive equipment

Compact, space-saving units

Low energy consumption

Optimized for environmentally friendly, low GWP refrigerants

Reduced applied costs, short payback times and easy service

Dedicated customer service around the world

Key for application diagram:

  • Compressors
  • Pressure switch
  • Ball valve
  • Check valve
  • Condenser
  • Fan
  • Solenoid valve
  • Filter drier
  • Sight glass
  • Expansion device
  • Evaporator
  • Controller
  • Pressure sensor
Close control diagram - Danfoss

Documents

Documents
Type Name Language Valid for Updated Download File type
Brochure Close Control A/C brochure English Multiple 17 Sep, 2014 987.8 KB .pdf

Related products

  • Compressors for air conditioning and heating - Danfoss
    Compressors for air conditioning & heating
    Compressors for air conditioning, providing enhanced comfort, efficiency and sustainability for rooftops and chillers, commercial applications with refrigerants R410A, R407C, R134a and R22.
  • Compressor and condenser controllers - Danfoss
    Pack controllers
    Danfoss offers a range of compressor and condenser capacity controls for use in food retail, in compact systems as well as in large power packs.
  • MCX programmable controllers - Danfoss
    Programmable controllers - MCX
    Danfoss’ range of universal MCX programmable controllers offers the functionality and reliability you need to get the best out of your heating, ventilation, air-conditioning and refrigeration (HVAC/R) equipment.
  • Filter driers family - Danfoss
    Filter driers
    Filter driers in hermetic design are ideal for commercial refrigeration applications requiring high drying capacity to prevent acid formation in the system.
  • Brazed plate heat exchangers for refrigeration - Danfoss
    Brazed plate heat exchangers for refrigeration
    The performance and efficiency of the brazed plate heat exchanger (BPHE) have been proven through 30 years of constant development to ensuring high efficiency.

Related solutions

  • Variable speed - Danfoss
    Variable speed
    Explore the different facets of variable-speed and AC inverter drive technology for efficient commercial air conditioning and precision cooling. Includes system descriptions, cases, training.

Case studies

  • Efficient data center cooling with inverter technology
    Low PUE in data center cooling saves energy and costs
    A British manufacturer has recently installed a scalable data center together with one of their customers which has achieved the impressive Power Usage Effectiveness rating (PUE) of 1.21. For security reasons we cannot reveal the name and the location of the data center since the information managed by the servers is in many cases very sensitive.

News

  • Variable-speed VZH compressor management
    Danfoss revamps medium and large programmable controls and introduces variable-speed VZH compressor management
    Wednesday, September 23, 2020
    Danfoss has upgraded its MCX15B and MCX20B controllers with the introduction of the MCX15B2 and MCX20B2 controllers. Both models combine best-in-class connectivity, security, and performance with improved compressor control logic for VZH inverter scroll compressors.
  • NovoCon® M, L and XL digital actuators
    NEW: NovoCon M, L and XL - Big news for fans of IoT solutions in smart building concepts
    Monday, August 3, 2020
    New NovoCon® M, L and XL digital actuators for AB-QM Pressure Independent balancing and Control Valves (PICV) complete the series of smart, digital, IoT actuators for hydronic HVAC applications.
  • Electronic stepper motor valves
    Danfoss releases long-lasting, reliable backup power module for electronic stepper motor valves
    Monday, July 13, 2020
    Danfoss has just released its EKE 2U backup power module for applications such as chillers, heat pumps, cold room, CRAC, and food retail—making it easier than ever to protect the compressor in the event of a power outage.

Contact us

For further information, please contact us.