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[EnergyPlus_Support] Convergence Issue during warmup period

The warmup calculations of the LargeOffice_Chicago_Base.idf posted in the files section does not converge.

The problem started when I modified the Windows construction from the NOT-RECOMMENDED "NonRes Fixed Assembly Window" to a double glazed model.

When I run it, E+ throws 2 severe errors:
** Severe  ** CheckWarmupConvergence: Loads Initialization, Zone = "GROUNDFLOOR_PLENUM" did not converge after 100 warmup days.

I tried reducing the HeatBalanceSettings: ConductionFiniteDifference Relaxation factor to 0.1 and increasing the Max Warmup days to 100 to no help.

Any suggestions?

Thanks
Homero.



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