Three parallel chillers. Change the load and watch staging turn machines on/off, temperatures shift, and the flow speed up or slow down.
Each chiller is 100 TR (351.7 kW). Auto staging adds a machine before any running chiller passes ~90% load, so they stay near their most efficient part-load. Slide the load down low and watch chillers switch off; force too few chillers for a big load and you'll see an overload warning. Compare Auto against Force 3 at low load to see how running fewer machines harder beats spreading load thinly across many.