Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The chiller is not turning off because the PLR passed to the curve is 0, it is turning off because there is no plant load. The warning is reported when PLR < PLR min, curve so if you decrease PLR min, curve to 0 the warnings will disappear.
For performance curves, the min/max values are meant to limit the curve result so extrapolation does not occur, but what most users do not know/understand is that limiting the curve output can at times cause erroneous results simply because the user did not provide a wide enough range for the curve inputs (e.g., temp or PLR). The best way to avoid issues is to plot the curve across the entire expected range of operation and make sure the curves are robust enough to extrapolate to the extremes of the simulation.
