Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
This warning means that the curves (EIRFT and/or CapFT) you use have limits that do not include the AHRI standard conditions, that is a Minimum / Maximum value of x/y on the Curve object that isn't broad enough.
In your specific application, that is worrying, because if you do not include the AHRI standard conditions, you also may not include ice making applications. Since you are doing ice making, your chiller must be water cooled, in which case this warning is issued if either the EIRFT or CapFT curves have limits for Condenser Entering Water Temperatures that do not include one (or both) of these values:
Real64 const HighEWTemp(30.0); // Entering water temp in degrees C at full load capacity (85F)
Real64 const LowEWTemp(19.0); // Entering water temp in degrees C at minimum reduced capacity (65F)
Extending the limits manually on the curve objects is problematic, because these limits indicate what the curve fitting was done on, and you may find strange or non-physical behavior by extrapolating outside of it. If you are doing ice making, you probably want to be using curves that represent this application anyways.
Source: The CheckCurveLimitsForIPLV routine in StandardRatings.cc
