Chiller | WSA/WSI ErP Techno

Chiller / WSA/WSI ErP Techno is an air-cooled industrial liquid chiller designed for process cooling 24/7, 365 days a year, air-cooled with two refrigerant circuits and screw compressors optimized for the use of the environmentally friendly refrigerant R513A, dry expansion shell and tube evaporator and cooling capacity from 376 kW to 1627 kW.

Cosmotec's experience in process cooling has led to the development of this series of industrial chillers that can meet the wide operating limits (both ambient and user side) required by the new technologies used for energy conservation. All cooling units in the WSA series are characterized by high levels of energy efficiency (class A or B) and meet the limits required by the 2009/125/EC Ecodesign ErP 2021 directive. The integrated Free Cooling version available for the WSA series also enables significant energy savings, especially when installed in areas with cold or temperate climates.

Also available in Low Noise version, ideal for installations near residential areas, our units maintain high performance and high energy savings, ensuring low noise. The HT version is designed for applications with high temperature water (up to +25°C) and includes screw compressors with oversized motors. The Electronic Expansion Valve (EEV) optimizes temperature and pressure for gas evaporation, increases efficiency at part loads on the user side and helps extend the unit's operating range. The Microchannel condensers are completely made of aluminum and expressly designed to maximize the performance of the cooling unit, they make it possible to reduce the overall dimensions and minimize the refrigerant charge. For better resistance to corrosion, e-coating protective treatment is available (optional).

Certifications

• ISO 9001
• ISO 14001
• ISO 50001
• UL certificate
• EAC air conditioning
• Certificate F.GAS

Free cooling for energy savings
Chiller / WSA/WSI ErP Techno is available in an integrated free cooling version, which allows significant energy savings, especially in applications requiring high coolant temperatures (plastics, data centers) and installation in areas with cold or temperate climates. By using the external air to cool the liquid, the Free Cooling system can even replace the refrigeration circuit entirely, allowing the deactivation of the compressors. Depending on the climatic conditions, the WSA chiller will use the most suitable operating mode between:

• Compressor mode (DX): the user's thermal load is met by the refrigerant circuit.
• Blend mode : reduces energy consumption by exchanging part of the thermal heat with the surrounding air. This solution partializes the operation of the compressors, as they only need to produce the missing part of the cooling capacity.
• Total free cooling : with low external air temperatures, the liquid is completely cooled by the surrounding air. Energy consumption is minimized thanks to the operation of only the variable speed fans and the partial valves.

Wide operating limits
Each application has different needs based on ambient temperature, liquid temperature, positioning, sound level, etc. Cosmotec can meet the most diverse needs, thanks to a wide range of options and the possibility to extend the operating limits of the WSA series chillers, if necessary.

• Very hot and dusty environment : WSA chillers are equipped with metal air filters to protect the condensers from dust and dirt. Operation is up to +55 °C with relief function. 100% cooling capacity is guaranteed down to +45 °C. If the temperature rises, the relief function shuts down the compressors without shutting them down.
• Very cold environment : the compressor compartment is closed and heaters are installed to protect the electrical panel, the compressors, the evaporator and the entire hydraulic circuit. Free cooling goes down to -40°C (special design) with specially selected components to guarantee a long life for the cooler.
• High temperature water applications (plastics): The HT version's cooling circuit is specially designed to reach high outlet temperatures. The compressor has an oversized motor that allows wide operating limits and high suction temperature.

Environmentally friendly version with LOW GWP
WSA units are available with environmentally friendly R513A refrigerant that provides a reduction in global warming potential (GWP = 572). Classified A1 R513A is non-toxic and non-flammable.

Integrated water unit (optional)
The hydronic unit contains the main hydraulic components and is available in different configurations: with single or double centrifugal pump, high or low head, fixed speed or inverter controlled.