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[EnergyPlus_Support] Re: OA controller and Heat Recovery

Your error points to the controller of your cooling coil. This should be reverse action, from memory...so this looks okay. It does seem that the setpoint on the exit of the cooling coil air side may be lower than the inlet water temperature.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "thimmannaharshana" <thimmannaharshana@...> wrote:
>
> Hi, 
> 
> I am modeling heat recovery device for a VAV system. Based on the E+ documentation, input to the minimum OA air tab on OA controller has to be manually given(instead of auto-sizing) if the heat recovery device is modeled. I gave the minimum OA value and the file results in the below shown error. If I make the minimum OA input as zero then there are no errors. However, with 0 input in the minimum outdoor air tab the heat recovery device doesn't not recover any heat. 
> 
> Does any of you know how to use heat recovery device in E+?
> 
> Thanks,
> Harshana
> 
> ** Severe  ** FindRootSimpleController: Controller error for controller = "VAV SYSTEM 4 COOLING COIL CONTROLLER"
>    **   ~~~   **  Environment=Burke Lakefront OH USA TMY3 WMO#=725245, at Simulation time=10/01 07:00 - 08:00
>    **   ~~~   **   Controller function is inconsistent with user specified controller action = Reverse action
>    **   ~~~   **   Actuator will be set to maximum action
>    **   ~~~   ** Controller control type=Temperature
>    **   ~~~   ** Controller temperature set point = 11.60 [C]
>    **   ~~~   ** Controller sensed temperature = 32.76 [C]
>    **   ~~~   ** Controller actuator mass flow rate set to 17.65 [kg/s]
>    **   ~~~   ** Controller actuator temperature = 6.74 [C]
>    **   ~~~   **   Note: Chilled water coils should be reverse action and the entering chilled
>    **   ~~~   **         water temperature (controller actuator temperature) should be below the setpoint temperature
>    **   ~~~   **   Note: Hot water coils should be normal action and the entering hot
>    **   ~~~   **         water temperature (controller actuator temperature) should be above the setpoint temperature
>




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