.AixLib.Obsolete.Year2019.Fluid.HeatPumps.HeatPumpDetailed.data_poly .AixLib.Obsolete.Year2019.Fluid.HeatPumps.HeatPumpDetailed.data_polyfunction data_poly = AixLib.Obsolete.Year2024.DataBase.HeatPump.Functions.Characteristics.ConstantQualityGrade;