EWYS-4Z

Efficient operation to limit running costs

VFD regulation and VVR control

Chilled and hot water by operating in both air-to-water and water-to-water all year round. The VFD modulates unit capacity efficiently at part load, while the VVR adjusts compressor operations to match any conditions, minimizing energy losses.

NO starting current

There are no current spikes at the start-up. The starting current is always lower than the current absorbed in the maximum operating conditions (FLA).

High power factor

It maintains a displacement power factor always greater than 0.95.

Quick comfort conditions & low water content required

The variation of the output power in direct relation to the cooling and heating requirements of the system allows it to reach the set-point conditions in less than one minute, allowing it to operate properly with the same amount of water as in the loop of a cooling-only inverter chiller. 

Outstanding reliability

Refrigerant circuits

Chilled and hot water by operating in both air-to-water and water-to-water all year round. The VFD modulates unit capacity efficiently at part load, while the VVR adjusts compressor operations to match any conditions, minimizing energy losses.

Refrigerant-cooled VFD technology

There are no current spikes at the start-up. The starting current is always lower than the current absorbed in the maximum operating conditions (FLA).

Single-scerw compressors

It maintains a displacement power factor always greater than 0.95.

Integration of multipurpose unit in a larger HVAC system

Intelligent Chiller Manager

Daikin intelligent Chiller Manager (iCM) allows control of up to 8 units within a system and manages the sequencing and capacity of each unit to achieve the overall required capacity while minimizing energy consumption. This ensures capacity management of the units without the need for an additional control panel, utilizing the unit’s software functionalities. This approach provides a highly cost-effective plant solution, prioritizing reliability over efficiency. 

Cascade system

Daikin iCM ensures proper integration of EWYS-4Z units into a system with distinct types of units, such as a 4-pipe system with EWYS-4Z and a chiller with heat recovery or a heat pump with a changeover valve for mode-switching.
In both cases, a full Daikin HVAC system can be designed. In the second case, the integration with water-to-water heat pumps (under the same system control) allows for full decarbonization of heating even where terminals would still be radiators. Indeed, a Daikin cascade system can be designed for the provision of heating water up to 75 °C, considering EWYS- 4Z in combination with a single screw compressor’s water- sourced heat pumps, eventually also equipped with VFD, and available under various refrigerant options (R-1234ze, R-513A, R-134a).

Daikin on Site

EWYS-4Z is equipped with Daikin on Site, a cloud-based remote monitoring system that ensures the proper functionality of cooling and heating plants.
This remote system allows facility managers to easily identify problems and find the right solutions whenever an alarm occurs. The platform allows for real-time evaluation of parameters, making it possible to adjust settings and intervene remotely when needed.

The unit is equipped with a modem and a GSM card, providing an autonomous internet connection.