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Severe error: Check the connection to a ZoneHVAC:EquipmentConnections object

asked 2023-11-14 14:32:47 -0600

Rohit Jogineedi's avatar

updated 2023-11-15 11:39:02 -0600

I've modeled a VRF system equipped with a DOAS system. I came across an error about the connection to a specific node.

The Node 135 (Shown in the error image attached below) is indeed connected to a thermal zone, however, I still keep getting this issue. Could someone help me in resolving this issue?

Thanks :)

C:\fakepath\Node-135 Connection.jpg

C:\fakepath\Air Terminal 20.jpg



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answered 2023-11-16 09:31:53 -0600

Keigo's avatar

Probably, you need to share your osm file or idf file to ask someone identify the cause.

By the way, your model is Not VRF ("Variable" Refrigerant Flow). You are using Coil:Cooling:DX:SingleSpeed and Coil:Heating:Fuel . You should put ZoneHVAC:TerminalUnit:VariableRefrigerantFlow upstream of AirLoopHVAC:OutdoorAirSystem as shown below.

image description

You can also refer to previous posts (VRF System & Terminal as DOAS for another VRF Terminal?, Zone VRF does not work with Airloop VRF).

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Thanks Keigo, however, it looks like I was able to actually identify the issue. There was a missing connection to the Thermal Zone, i.e; the Thermal Zone was not assigned during the geometry building phase. This fixed the current issue.

Rohit Jogineedi's avatar Rohit Jogineedi  ( 2023-11-30 13:22:28 -0600 )edit

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Asked: 2023-11-14 14:32:47 -0600

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Last updated: Nov 16