Daikin Europe’s new EWYD-AJYNN Heat Pump Inverter Unit heralds a new generation of air-to-water heat pumps. Thanks to its innovative design, which incorporates an inverter-driven single screw compressor, a building’s conventional gas boiler can be replaced and considerable savings in annual energy costs are possible, in both heating and cooling operations.

With Daikin Europe’s innovative EWYD-AJYNN, the heat pump can fully match the building’s thermal load, even if the ambient temperature falls as low as -12 ºC, reveals the company’s press release. The reason is that the inverter boosts the compressor with a frequency increase that exactly follows the required thermal load, resulting in considerable energy and cost savings possible during the heating mode. Moreover the unit is also beneficial during the cooling phase. As the outside ambient temperature increases in summer, so too does a building’s cooling load, creating circumstances a traditional chiller actually loses capacity in. Thanks to the integrated inverter in the EWYD-AJYNN, the compressors are boosted by a frequency increase to match the required cooling load. Again, cost savings are significant.

The unit is designed and optimised for an easy and fast network connection with Building Automation Systems and Management Systems, and uses R-134a refrigerant, which is considered the most efficient refrigerant for screw compressors on the market. Even at the lowest outside ambient temperature, the refrigerant’s evaporating pressure is still higher than atmospheric pressure. Other benefits of the EWYD-AJYNN Heat Pump Inverter Unit include: optimum unit power factor, no more current inrush when the unit starts, lower noise levels during most of the year and optimized defrosting cycles. This innovative product line is available in a variety of sizes for large, industrial and/or commercial buildings. Capacity varies from 255 to 385 kW for cooling and 274 to 412 kW in heating mode.