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Error while modeling radiant underfloor cooling system

asked 2018-12-12 08:37:35 -0600

kkotenidisGRtuc gravatar image

updated 2019-01-07 15:34:38 -0600

Hello guys! I'm a student in Technical University in Crete and I've been struggling a couple of weeks in a project, in which I would like to model a radiant floor cooling system using "Low Temperature Radiant Variable Flow" and I'm getting the following error every time:

 ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 1
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 2
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 3
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 4
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 5
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 6
   ** Severe  ** Hydronic radiant systems may not be autosized without specification of nodes or schedules.
   **   ~~~   ** Occurs in ZoneHVAC:LowTemperatureRadiant:VariableFlow (heating input) = LOW TEMP RADIANT VAR FLOW 7
   **  Fatal  ** GetLowTempRadiantSystem: Errors found in input. Preceding conditions cause termination.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=8
   ..... Last severe error=Hydronic radiant systems may not be autosized without specification of nodes or schedules.

I have already seen this post: https://unmethours.com/question/19482... but I couldn't solve my error. Could somebody help me please?

I'm attaching my .osm and weather file .epw in a .zip here: http://www.mediafire.com/file/281lrnz...

Thank's in advance!

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answered 2019-01-07 15:02:34 -0600

Based on the error messages, it appears that the radiant system has not been connected to a working plant loop. If that's not the case, please post the idf file.

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Asked: 2018-12-12 08:37:35 -0600

Seen: 43 times

Last updated: Jan 07