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Unitary system & dehumidification

asked 2015-02-20 15:55:48 -0500

cesar8 gravatar image

updated 2015-02-22 10:34:32 -0500


  1. I create my empty AirLoop, and
  2. I added an Outdor Air System,
  3. I choose my Thermal Zones
  4. In the Thermal Zone, I put an humidstat.
  5. The Humidstat has a setpoint, fixed on 50% maximum and 30% minimum (but I try also to change the values : nothing changes)
  6. Add a Air Terminal Single Duct Uncontrolled Diffuser ,
  7. and finally I place my Unitary System near the OAS

The result is: relative humidity 100% sll the time, never under 80%! I don't understand what i did wrong...


2015-02-21 Comment Moved from Answer

excuse me, I know that is not an answer, but I do not know another way to enter the screens

setpoint manager thermal zone:humidifing/dehumidifing setpoint manager image description image description image description

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@cesar8 I deleted your answer below and moved your comments to the original question. You can update your original question by using the edit feature at the bottom right or by using the add a comment feature at the bottom left of the question or answer.

MatthewSteen gravatar image MatthewSteen  ( 2015-02-22 10:38:08 -0500 )edit

ok I apologize for that, Matt. As for my question, however, you have no idea what could be the problem? It seems that the supply-air does not arrive at all, given the percentages of temperature and humidity ... thanks in advance

cesar8 gravatar image cesar8  ( 2015-02-23 09:57:47 -0500 )edit

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answered 2015-02-20 16:53:17 -0500

updated 2015-02-20 16:54:35 -0500

You probably need a Humidity SetpointManager:

SetpointManager:MultiZone:Humidity:Minimum SetpointManager:MultiZone:MinimumHumidity:Average

This is related to a small bug where the humidity SPM icon doesn't show up on the node when added. However, if you click on the node you should be able to edit the SPM.

image description image description

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Thank you for the answer, Matt, your suggestion is correct, but was not able to greatly improve the results...the moisture percentages are still very high. I would like to show some screenshots with the settings of the thermal zone and the system, because even temperatures meet those set by me. It may be that something is wrong in the general settings of the unit? I can attach the screens using the field of the answers? thank you for your help @MatthewSteen

cesar8 gravatar image cesar8  ( 2015-02-21 08:27:48 -0500 )edit

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Asked: 2015-02-20 15:55:48 -0500

Seen: 298 times

Last updated: Feb 22 '15