What is the efficiency range of the 19XR/XRT centrifugal chiller?

At ARI (American Refrigeration Institute) standard conditions the efficiency of the 19XR ranges from .55 to .65 IKW/TON (.157 to .185 kW/kW) at full load. Integrated Part Load Value (IPLV) are equivalent to full load efficiencies. The 19XRT efficiency level approaches the .50 IKW/TON (.143 kW/kW) level.