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How to Clear Warnings after Running OS Model

asked 2015-06-24 14:08:39 -0500

tajjmann gravatar image

updated 2016-05-17 11:47:53 -0500

I have developed a model and run with ideal air loads which gave me the following warnings with no errors. However I wish to clear each one of them (warnings with asterisk), Any help?

Beginning Zone Sizing Calculations
** Warning ** ProcessScheduleInput: ScheduleTypeLimits="CONTROLMODE", Unit Type="CONTROLMODE" is invalid.
** Warning ** ProcessScheduleInput: ScheduleTypeLimits="LINEARPOWERDENSITY", Unit Type="LINEARPOWERDENSITY" is invalid.
** Warning ** ProcessScheduleInput: ScheduleTypeLimits="VOLUMETRICFLOWRATE", Unit Type="VOLUMETRICFLOWRATE" is invalid.
** Warning ** ProcessScheduleInput: Schedule:Compact="HVACTEMPLATE-ALWAYS 4", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS_ON", Blank Schedule Type Limits Name input -- will not be validated.

 ** Warning ** Output:Meter: invalid Name="GAS:FACILITY" - not found.
 ** Warning ** Output:Meter:MeterFileOnly: invalid Name="GAS:FACILITY" - not found.

After adding a CYCLING ELEC PTAC, the following additional warnings were realised, how can i clear this?

Beginning Simulation

** Warning ** CalcDoe2DXCoil: Coil:Cooling:DX:SingleSpeed "CYCLING ELEC PTAC 1 SPD DX CLG COIL" - Air-cooled condenser inlet dry-bulb temperature below 0 C. Outdoor dry-bulb temperature = -3.62
**   ~~~   **  ... Occurrence info = RUN PERIOD 1, 01/02 08:00 - 08:10
**   ~~~   ** ... Operation at low ambient temperatures may require special performance curves.
** Warning ** CalcDoe2DXCoil: Coil:Cooling:DX:SingleSpeed "CYCLING ELEC PTAC 1 SPD DX CLG COIL" - Full load outlet air dry-bulb temperature < 2C. This indicates the possibility of coil frost/freeze. Outlet temperature = -5.09 C.
**   ~~~   **  ...Occurrence info = RUN PERIOD 1, 01/02 08:00 - 08:10
**   ~~~   ** ... Possible reasons for low outlet air dry-bulb temperatures are: This DX coil
**   ~~~   **    1) may have a low inlet air dry-bulb temperature. Inlet air temperature = 14.517 C.
**   ~~~   **    2) may have a low air flow rate per watt of cooling capacity. Check inputs.
**   ~~~   **    3) is used as part of a HX assisted cooling coil which uses a high sensible effectiveness. Check inputs.
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If you place one line before the code and 4 spaces on each line, it will appear like a code and is easy to read.

rkbest gravatar image rkbest  ( 2016-05-17 11:31:21 -0500 )edit

Has anyone resolved this issue? I am seeing similar issues when using HVAC template for PTAC

Krishnan gravatar image Krishnan  ( 2016-09-13 12:34:03 -0500 )edit

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answered 2018-07-20 11:34:50 -0500

The warnings about invalid ScheduleTypeLimits can be eliminated by replacing the quoted ScheduleTypeLimits.

The warnings about operating DX Cooling Coils at too low temperatures are physically reasonable, therefore the best way to avoid such warnings is to switch off operation whenever these conditions occur, which can be done by EMS instructions.

I have had problems operating air-water heat pumps at temperatures below EnergyPlus standard limits. In these case, it was possible to overcome the problem by modifying the Energy+.idd file.

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Asked: 2015-06-24 14:08:39 -0500

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Last updated: Jul 20 '18