10 advantages of Daikin’s new multipurpose unit

Vienna, September 2024 – Daikin  launched the new polyvalent unit EWYS-4Z, equipped with Daikin inverter-driven, single-screw compressors. It is an efficient and reliable unit designed for commercial and industrial applications where simultaneously cooling and heating is needed. The new multipurpose unit operates with R-513A refrigerant, of which the Global Warming Potential (GWP) is 55% lower than R-134a, while maintaining the same safety classification (A1).

Reliable operation and optimal performance across a wide range of applications and circumstances

The Daikin EWYS-4Z polyvalent unit features highly efficient single-screw compressors with Variable Frequency Drive (VFD) and Variable Volume Ratio (VVR) technology.

As a result, EWYS-4Z is highly versatile and can be used across a variety of applications, including industrial or commercial buildings, hotels or hospitals. It ensures reliable operation and optimal performance in diverse locations and varying weather conditions. A low-noise configuration is also available, incorporating noise reduction lower fan speeds and a specially designed soundproof compressor cabinet. Enhanced insulation on refrigerant pipes and special connections at the compressor's suction significantly reduce vibration transmission.

EFFICIENT OPERATION TO LIMIT RUNNING COSTS

REASON 1: VFD regulation combined with VVR control

The EWYS-4Z range delivers chilled and hot water in both air-to-water and water-to-water configurations, operating efficiently year-round. The VFD modulates unit capacity efficiently at part load, while VVR adjusts compressor operations to match any conditions, minimizing energy losses.

REASON 2: No starting current surge

There are no current spikes at start-up. The starting current is always lower than the current drawn under maximum operating conditions (Full Load Ampere, FLA).

REASON 3: High power factor

The EWYS-4Z maintains a displacement power factor constantly above 0.95, helping to avoid power factor penalties and reduce electrical losses in cables and transformers.

REASON 4: Quick comfort conditions and low water content required

The ability to adjust output power in direct relation to the system’s cooling and heating needs allows the unit to reach set-point conditions quickly. The transition between different operating modes occurs in less than one minute, enabling it to function effectively with the same water volume as  a cooling-only inverter chiller.

OUTSTANDING RELIABILITY

Reliable operation is ensured through  both the product design and control.

REASON 5: The EWYS-4Z is designed with two separate and independent refrigerant circuits, ensuring maximum safety and ease of maintenance.

REASON 6: Daikin’s refrigerant-cooled VFD technology is unaffected by environmental conditions such as ambient temperature, altitude, or air quality, ensuring unparalleled reliability.

REASON 7: Thanks to meticulous design and extensive experience, Daikin’s single-screw compressors feature highly balanced mechanical loads. This design reduces component stress, extends the unit’s lifespan, and improves reliability. It also minimises vibration and noise emissions. The compressor’s excellent volumetric efficiency makes them ideal for variable-speed applications, even at high speeds, with geometry optimised for such operations.

REASON 8:  Daikin intelligent Chiller Manager (iCM) enables control of up to eight units within a system. It manages the sequencing and capacity of each unit to achieve the overall required capacity while minimizing energy consumption. That ensures proper sequencing and capacity management without the need for an additional control panel, leveraging the unit’s software functionalities. It offers a highly cost-effective plant solution, prioritizing reliability and balancing the load between units. This optimisation enhances the working conditions of the entire system and extends the lifespan of the units.