Bug in HVACTemplate:Zone:FanCoil

asked 2023-03-29 04:43:17 -0500

Keigo's avatar

updated 2023-03-29 12:54:28 -0500

A bug report.

When we select VariableFanVariableFlow or ASHRAE90VariableFan for Capacity Control Method of HVACTemplate:Zone:FanCoil, we get the following severe error and the simulation terminates.

   ** Severe  ** GetFanCoilUnits: ZoneHVAC:FourPipeFanCoil: SPACE1-1 FAN COIL
   **   ~~~   ** ...the fan type of the object : SPACE1-1 SUPPLY FAN does not match with the capacity control method selected : VARIABLEFANVARIABLEFLOW please see I/O reference
   **   ~~~   ** ...for VariableFanVariableFlow or VariableFanConstantFlow a Fan:SystemModel should have Continuous speed control.

It is because Speed Control Method of Fan:SystemModel is set to Discrete in the expidf file. Speed Control Method should be Continuous.

You can easily reproduce the bug using ExampleFile HVACTemplate-5ZoneFanCoil.idf (V22-2-0).

We can edit Speed Control Method in the expidf file manually, but I hope Continuous is automatically selected when we run idf files with HVACTemplate:Zone:FanCoil.

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You might want to also describe this here so that the EnergyPlus development team can try to fix it.

JasonGlazer's avatar JasonGlazer  ( 2023-03-29 06:38:46 -0500 )edit
Keigo's avatar Keigo  ( 2023-05-02 20:25:30 -0500 )edit