One of the traditional Qe Data Centre Cooling products, is the Qe CRAC-DX Only precision cooling unit. This energy efficient product offers close control cooling and the ability to facilitate an ultra-clean environment. It can be deployed along with free cooling Qe CRAC units as no outside wall positioning is required allowing the unit to be situated closer the heat load.

High Energy Efficiency

  • The EVO intelligent controller ensures optimum cooling efficiency and control. The large colour touch screen display with intuitive graphics provides intelligent control at the fingertip
  • Efficient EC fan, providing optimum airflow adjustment, optional EC fan under floor design
  • Inverter Drive Compressors to precisely match cooling capacity to actual cooling load demand
  • Electronic Expansion Valves providing smooth control of refrigerant gas to optimise load matching
  • FE2Owlet Axil Condenser Fans are high efficiency, low noise, and include variable frequency speed control for condenser fan motors

High Adaptability

  • Air discharge choices include down flow, up flow
    • Customized design available
      • Efficient and quiet flexible inverter drive compressors
      • Electronic Expansion Valves offering precision cooling capacity control
      • Suitable for variable ambient temperature conditions (Optional low temperature start up kits for DX unit)
      • Can work with other Qe CRAC unit types in Teamwork Control mode
    • Intelligent precise control function for constant temperature and humidity
    • Designed for the continuous 365 x 24 operation under full range of climate conditions
  • Long lifetime design with low operating and maintenance costs
  • Large airflow supply with high SHR and low power consumption
  • Ultra-wide input power adaptability, optional automatic re-start and delayed start up function
  • Remote monitoring and control through dry contact or RS485 communication interface with open protocol
  • Menu-based large LCD display with multi-level password protection function
  • Standby (master/slave) mode and rotating duty mode available
  • Self-diagnosis function, various system diagnosis, alarm, and protection functions


  • Transfer switch for Dual Power Input
  • Wired temperature/humidity sensors Realize the precise matching of cooling capacity and heat load
  • Condensate water pump where gravity pipe runs to drains are not possible

Model Sizes (kW):

  • Single Circuit 25, 30, 35, 40, 45
  • Dual Circuit 40, 50, 60, 70, 80, 90, 100

Air Flow Orientations:

  • Up Flow
  • Down Flow

Air Flow Volume Range:

  • 8,000 to 30,000 m3/h


  • Height (mm) 1990 – 1990
  • Width (mm) 1050 – 2550
  • Depth (mm) 890 – 1000
  • Weight (kg) 365 – 925

EVO intelligent controller

  • 7-inch, 800×480 dot matrix true color touch screen
  • Temperature and humidity curves
  • Graphical display of device running status
  • Multi-level password protection
  • Able to connect multiple temperature & humidity sensors and detect the temperature & humidity of the inlet/outlet air of racks
  • Control mode selected according to the rack cooling demand, precise air supply to realize energy saving
  • RS485 interface as standard
  • Optional SNMP and TCP/IP interface
  • Multiple history alarms, expanded storage of history alarms is provided
  • The running data stored every 60 seconds into a rolling log.
  • The relevant data can be read directly via Building Management Systems
  • Team Work Function to group multiple units easily
  • Selective area temperature control
  • Shared temperature and humidity setting
  • Team work mode: demand management, trend management, rotation and standby (lead/lag), realising adaptive energy saving

EC fan

  • Saving 20%~30% energy compared to traditional AC motor
  • Soft-startup function, low startup current
  • Adjust rotary speed automatically according to cooling requirements and airflow pressure, and provide airflow as required
  • N+1 redundant configuration of fans, ensure the airflow in case of any fan fault
  • Easy-maintenance design

Inverter Drive Compressors

  • Variable capacity range between 20% and 100%
  • Optimum Efficiency especially at part load and mixed mode
  • Soft Start providing smoother power system loading
  • Precision control and timely reaction to heat load changes
  • Reduction in stop start cycles reducing power consumption and increasing life cycle

Electronic Expansion Valve

  • Precision cooling capacity control through Electronic increments to the expansion valve
  • Optimising energy conservation by precisley matching the cooling capcity in combination with the Inverter compressor to the heat load
  • Wide range of incremental inputs, to optimise the reduction of superheat and improving EER
  • Quick incremental positioning responses to feedback to facilitate accurate heat load matching

Condenser – FE2Owlet Axil Fan Technology

  • Frequency conversion control, high efficiency and energy saving
  • FE2Owlet axil fan, low noise characteristics
  • Stainless steel connector and marine grade corrosion-resistant aluminum
  • Single/dual refrigeration circuit design, achieve centralized condensation solution


  • Transfer switch for Dual Power Input
  • Wired temperature/humidity sensors Realize the precise matching of cooling capacity and heat load
  • Condensate water pump
How can we help?

Interested in this product? For further information and a spec sheet
please fill in our contact form and one of our specialists will contact you.