# How to determine custom chiller performance curves with correct coefficients?

I would like to know how to create a chiller curve for particular chillers in energy-plus. The two exact chillers I am trying to model are:

- Standard Water-Cooled Chiller (WSC087 Std Chiller)
- Magnetic Bearing Water-Cooled Chiller (WME500 MAG)

It would be helpful to have a step-by-step process of how you determine the coefficients for the three curves required. An example would be most useful, which references the energy plus documentation when needed.

Thanks, Brian

For EnergyPlus?

Yes, sorry I updated question details to include this