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Re: [EnergyPlus_Support] HVACTemplate:System:PackagedVAV
You could correct these inputs and then use
SetPointManger:SingleZone:Coolling and SetPointManger:SingleZone:Heating
to control each coil individually (or even scheduled SP managers if you
like). You may have to manually size the heating coil if autosizing is used.
eddiecorwin wrote:
>
> I am trying to model a Packaged VAV system, and I am using the
> HVACTemplate:System:PackagedVAV object to do so. I am getting the
> following warning when the object is expanded:
>
> ** Warning ** Output:PreprocessorMessage="ExpandObjects" has the
> following Warning conditions:
> ** ~~~ ** Warning: In HVACTemplate:System:PackagedVAV "RTU Packaged
> VAV" the Heating
> ** ~~~ ** Coil Design Setpoint is greater than the Cooling Coil Design
> Setpoint. This
> ** ~~~ ** may cause the heating coil and cooling coil to operate
> simultaneously.
> ** ~~~ ** Check results carefully and adjust controls if needed.
>
> The warning is telling me that I should have my cooling-coil
> temperature (currently 55*F) warmer that the heating-coil temperature
> (currently 75*F) so that they don't fight each other. This would be
> fine if I had a a main heating coil & and reheat coil, but in this
> case the main heating coil needs to provide all of the heating.
>
> Has anyone run into this issue before? Or, has anyone successfully
> modeled a packaged VAV system without reheat coils? If so, how do you
> keep the heating coil and cooling coil from fighting each other?
>
>
--
Richard A. Raustad
Senior Research Engineer
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