I'm working on a chiller comparison for a chilled central water plant upgrade. I want to compare the results of two different chillers, but the manufacturer was only able to provide limited part load performance data. The two chillers that need to be modeled are the York YMC2 and York YZ, both with a capacity of 500 tons. Since the equipment hasn't been installed, I am unable to extract the performance data myself. Are there any strategies for developing the energyplus performance curves with limited manufacture information?