[EnergyPlus_Support] RE:AHU1 Gallery Store PostZTR Hum.idf

["civilnug" <civilnug@xxxxxxxxx>]

Hi All,

I've put the above idf in the Problem_Submittals file. In it I have, 
in order, a mixing box, cooling coil, heating coil and humidifier on 
the air loop. This is fed into an area by a direct air system and has 
to have tightly controlled relative humidity levels (50% +/- 5%). The 
system is operating perfectly in winter but my problem is occuring 
during the summer months when attempting to get control of the rh. 

The cooling coil kicks in to drag down the temperature below the 
supply air temperature so as to get the humidity ratio to the right 
level, my problem is that the heating coil won't kick in to bring the 
temperature back up to the specified supply air temperature.

Any help would be greatly appreciated.

Regards,
John McCarthy.





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