chiller curve min / max value of x / y

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I would like to change the chiller curves in OpenStudio v1.10. The coefficients could be changed successfully, however, every time after I change the min/max value of x or y, they will automatically change back to original numbers. From E+ data sets, the min and max value of x should be 5, 10; while the min and max value of y should be 24, 35. But in OS, they are 0,20;0,50. Is there any way that I could change the limits? Will these limits affect cooling energy results?