[Equest-users] UA Convergence Error

[Paul Diglio]

Hi Folks:
I am getting a "heat exchanger XX Sys1 UA calculation failed to converge" error.  The model has three building in it and only two air handlers per building.  I don't have any heat exchangers attached to the air handlers or any heat recovery installed.

Sometimes the error occurs when I change the glass type via the library and other times I get the error when I adjust the air changes per hour in one or two zones.
In the example above, the error was for system B2, but it varies...sometimes systems A or C 1 or 2.
Any ideas what the problem could be?  

Thank you,

Paul Diglio
87 Fairmont Avenue 
New Haven, CT 06513 


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