IES-VE User Forum

I'm currently trying to run a model that uses a chilled beam system. The issue I'm having is that when I attempt to run the system load calculations I am getting an error in my cooling coils stating that the leaving DBT is less than the entering CWL temperature. I've tried to rerun my system and look for discrepancies between units, but so far I'm unsure as to what might be causing this error.

I'm new to IESVE and any advice someone might have would be most appreciated.

Thanks!

Alex

This error is caused because you have a controller calling for a CC LAT that is less than the EWT. For example, you may be supplying 60°F water to a coil and have a coil leaving air temperature of 55°F. The software is recognizing that it is not possible to make 55°F air with 60°F water and giving you an error message. You'll likely need to revise your coil leaving air temperature.