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PTHP error : missing required property

Hi everyone,

I'm a beginner with Openstudio and I currently try to make the PTHP component to work but without success. In the Thermal Zones section, I simply drag and drop the component from the library to the corresponding thermal zone.

I then run the simulation and the following error message ensue:

* Severe * <root>[Coil:Cooling:DX:SingleSpeed][PTHP 1 Spd DX Clg Coil] - Missing required property 'air_inlet_node_name'.

* Severe * <root>[Coil:Cooling:DX:SingleSpeed][PTHP 1 Spd DX Clg Coil] - Missing required property 'air_outlet_node_name'.

Does that mean that I need to create an Air Loop or something similar for it to work?

If I replace the PTHP with a basic electric baseboard component it works fine.

I run the latest OpenStudio release (1.6)

Thank you for your help!

asked 2023-12-14 11:24:50 -0500

updated 2023-12-14 12:15:00 -0500

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@QCeng, I tried reproducing your issue with the OpenStudio Application v1.6.0 (the App):

US DOE Prototype Warehouse
drag-dropped the library PTHP as zone equipment (office)
successfully ran a simulation, no warnings/errors

Can you edit your initial question and provide:

an excerpt of the generated IDF "ZoneHVAC:PackagedTerminalHeatPump"
another IDF excerpt: the PTHP's "Coil:Cooling:DX:SingleSpeed"
or instead link your .osm file (optional)

Neither IDF entries (PTHP nor Coil) should have blank "Air Inlet/Outlet Node Names". And no, you shouldn't need an AirLoopHVAC.

Denis Bourgeois (2023-12-14 15:39:44 -0500) edit

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Thank you for you comment Denis, I have solved my issue.

Upon looking at the IDF file, the nodes were empty because the thermal zone associated didn't even exist. I use the Sketchup plugin so I suspect that a "ghost" thermal zone was created by accident, or something similar.

I should have been more careful!

Thanks for your help

answered 2023-12-17 01:52:29 -0500

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Glad you isolated the issue. You should click on the checkmark (on the left) to flag your own answer as "correct" (i.e. problem solved).

Denis Bourgeois (2023-12-17 05:55:47 -0500) edit

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