EWYS-4Z_Product catalogue_ECPEN24-446_English
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Simultaneous heating and cooling with R-513A refrigerant
The product is equipped with Daikin Inverter-Driven Single-Screw Compressors with Variable Frequency Drive (VFD) and Variable Volume Ratio (VVR), operating with R-513A refrigerant, which has a very low Global Warming Potential (GWP).
Its capacity range is from 400 to 800 kW in both cooling and heating modes, with a Total Energy Efficiency Ratio (TER) of up to 7.89. It operates in ambient temperatures from -18°C to +50°C, with chilled water temperatures ranging from -8°C (with a water/glycol mixture) to +20°C, and heating water temperatures from +30°C to +60°C.
As a result, the EWYS-4Z can be extensively used across various applications, from industrial to commercial buildings, hotels, and hospitals. It ensures reliable operation and optimal performance in a wide range of locations and weather conditions.
2 sound configurations
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Capacity range
From 400 up to 800 kW in both heating and cooling
Operating range
Product Benefits
10 good reasons to choose our EWYS-4Z
Efficient operation to limit running costs
#1 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.
#2 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).
#3 High power factor
It maintains a displacement power factor always greater than 0.95.
#4 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
#5 Refrigerant circuits
Two separate and independent refrigerant circuits ensuring maximum safety and ease of maintenance
#6 Refrigerant-cooled VFD technology
Daikin refrigerant-cooled VFD technology is not affected by environmental conditions (ambient temperature, altitude or air quality) ensuring unparalleled reliability.
#7 Single-screw compressors
Daikin single-screw compressors feature highly balanced mechanical loads, which reduce component stress, extend the life of the unit, improve reliability, and minimise vibration and noise emissions. The excellent volumetric efficiency of the compressors makes them ideal for variable-speed applications.
Integration of multipurpose unit in a larger HVAC system
#8 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.
#9 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).
#10 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.
Product Applications
Cooling + Heating
Space Cooling & Heating
- Centralized heating, and simultaneous need for cooling. Units can be managed in master / slave up to an array of 4 modules per master
- Hospitals and offices
- Replacement and new buildings
- Possible terminals:
- Heating
- Radiators (up to 60 °C)
- Heating floor (30-35 °C)
- Fan coils (45 °C)
- Cooling
- Fan coils (7 °C)
- Heating
Cooling + Heating + Domestic Hot Water
Space Cooling & Heating + Domestic hot water
- Centralized heating, and simultaneous need for cooling. Units can be managed in master / slave up to an array of 4 modules per master
- Hospitals and offices
- Replacement and new buildings
- Possible terminals:
- Heating
- Radiators (up to 60 °C)
- Heating floor (30-35 °C)
- Fan coils (45 °C)
- Cooling
- Fan coils (7 °C)
- Heating
