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[EnergyPlus_Support] ZoneHVAC:IdealLoadsAirSystem Outdoor Air Flow Rate

Hello,
I am trying to integrate a ideal loads sytem into my model, but there are 2 difficulties with the outdoor air flow rate.

1) ** Severe  ** ZoneHVAC:IdealLoadsAirSystem outside air mass flow rate reduced due to low supply air flow requirement

I get this ERROR when I set Outdoor Air to a flow rate at 1ACH mechanical ventilation (=0,038m3/s OutdoorAir)which makes no sense for me, because without outdoor air (NoOutdoorAir) there is no warning. Moreover the simulation finishes with first view reasonable results (1ACH mechanical ventilation/less cooling load when its cold outside). So why this error? and is there a way around? May I ignore the warnings? I just want an ideal loads system with a fixed outdoor mechanical ACH. I am not interested in e.g. pressure rise, fan electricity consumption.

2) I would like to schedule this mechanical ventilation in an Ideal Loads context, but there is no schedule object in the ZoneHVAC:IdealLoadsAirSystem. Any suggestions?

Thank you in advance






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