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DAIKIN’s new inverter screw chillers: Class-leading efficiencies and lower carbon emissions

Brunn am Gebirge, February 2014_Daikin’s new EWAD-TZ chiller range offers class-leading energy efficiencies (EER up to 3.1; ESEER up to 5.1, tested to EN14511) and can lower running costs and carbon emissions by up to 20% compared with traditional chillers, thanks to advanced inverter screw compressor technology.

Daikin inverter screw chillers can deliver precise control of process cooling and climate management across a range of industrial and commercial operations, particularly where there are high variations in load, so excellent part load efficiency is vital. The chillers are suitable for both new build and retrofit projects.

The new inverter screw compressor – Daikin leads the way again

A traditional inverter air-cooled chiller has a compressor that is not optimised for high speed rotation. These chillers also require expensive shielded cabling to reduce interference, plus large electrical panels to accommodate the inverter, with forced ventilation for cooling the panel itself. In contrast, the new Daikin inverter screw compressor is optimised for running at high speed and high refrigeration flow and has truly stepless capacity control. Larger compressor discharge and suction ports reduce refrigerant pressure drops and, because the refrigerant-cooled inverter is part of the compressor body, the unit is compact. In fact, it is no bigger than a non-inverter unit.

The inverter screw compressor runs on R-134a refrigerant. Single compressor units have a cooling capacity of between approximately 200kW and 350kW, while dual compressors in the larger units in the EWAD-TZ range have cooling capacities of up to 700kW. 

The new chillers use standard cabling and have a compact electrical panel (because the inverter is part of the compressor) that does not require forced ventilation.

Inverter screw chillers – efficient and quiet

Inverter screw compressors run most efficiently at partial loads, using only the power necessary to match the load required. This makes them highly efficient and results in lower operation costs.As well as being highly efficient, the EWAD-TZ chillers have reduced sound levels under both full and partial operating conditions, thanks to the inverter screw compressors and a unique fan design that moves large volumes of air almost silently. This quiet operation means the units are ideal for use in built-up areas. Daikin offers three sound level options: standard (83 dB(A) sound pressure at 1m), low noise (77 dB(A)) and extra low noise (73.0 dB(A)).

The complete package for easy installation, commissioning and maintenance

Daikin chillers are assembled and factory tested before shipment and all controls are pre-wired, adjusted and tested to offer an almost ‘plug and play’ unit, even for larger installations where high cooling capacities are needed.

Whether used for a new or refurbishment project, the EWAD-TZ chiller range is easy to service and maintain and comes with after-sales support from Daikin, including training and advice on selection, installation, commissioning and operation. The chillers have user-friendly smart controls and can be integrated easily with building management systems, allowing installers and business owners to monitor performance and identify faults more easily.

Rapid payback and long term savings for businesses

Daikin’s new inverter screw chiller range offers rapid payback, within three years of installation. In the long term, the compact chillers’ reliability and outstanding energy efficiencies mean ownership costs are low. With a one-year warranty as standard and extended warranties available, plus maintenance contracts on offer from Daikin’s installer network, business owners can rest-assured that they will have the support they need for their chiller system.

Daikin inverter screw chillers 

With ever-tightening legislation on energy efficiency and CO2 emissions, business owners face a number of challenges when updating and renewing business-critical process cooling and climate management systems.

The new Daikin inverter screw compressor at the heart of the new EWAD-TZ chiller range reflects Daikin’s commitment to developing highly efficient systems that help reduce energy consumption, without compromising on reliability and performance. By installing these advanced chillers, business owners can benefit from significant carbon savings and reduce the impact of rising energy prices.


Press Contact:  
Daikin Airconditioning Central Europe HandelsgmbH  
Mag. Alexander Dalinger  
A-2345 Brunn am Gebirge, campus 21, Europaring F12/402  
+43 (0)2236 32557 / 

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