• Revit

Work with check system tools

Review system check tools and use them to highlight system errors.


Tutorial resources

These downloadable resources will be used to complete this tutorial:

ModelSysDsgn_RVT.6-01_2024.zip

Step-by-step guide

Review system check tools and use them to highlight system errors.

  1. Open the project M06_01.rvt.
  2. Ensure that the current view is HVAC > Floor Plans > 1 – Mech.
  3. On the ribbon, Analyze tab, note the Check Systems panel and tools.
  • The Revit interface, with the Project Browser and model for this example opened to the HVAC floor plan view; and on the Analyze tab of the ribbon, the Check Systems panel of tools is highlighted in red.
  1. Click Show Disconnects.
  2. In the Show Disconnects Options popup, select Duct and Pipe.
  • The Show Disconnects Options dialog box, with Duct and Pipe selected.
  1. Click OK.

Disconnects are indicated by a yellow warning triangle.

  1. Select the section of duct with the disconnect.
  2. On the contextual ribbon tab, click Cap Open Ends to resolve the issue.
  • In the zoomed-in floor plan view, a section of duct is selected where a disconnect is indicated by a yellow triangle, and on the ribbon, Cap Open Ends is being selected.
  1. To recreate the connection to the air terminal, right-click and select Draw Flex Duct.
  • A portion of the model view showing the area next to the air terminal, with a section of duct selected where a disconnect is indicated by a yellow triangle, and in the expanded shortcut menu, Draw Flex Duct is being selected.
  1. Click Show Disconnects.
  2. Deselect Duct and Pipe.
  3. Click OK.
  4. In the Check Systems panel, click Check Duct Systems.

This highlights the issues as shown.

  • In the floor plan view, three issues are identified by yellow warning triangles.
  1. In the supply system to the right, select the first warning triangle.
  2. Review the warning message, which suggests an issue with the flow configuration set at the system connectors.
  • In a zoomed-in view of the supply system, the warning message for the first triangle suggests an issue with the flow configuration.
  1. Close the warning.
  2. Select the second warning triangle in the system to review the warning that there are disconnects in the system, and that there is more than one physical network.
  • In a zoomed-in view of the supply system, the warning message for the second triangle indicates that elements in the system are not connected in a single physical network.
  1. Close the warning.
  2. Consider the first warning. The same VAV box and the same air terminals are used in other systems in the project, so the issue is not likely to be with connector configurations.
  3. Consider the second warning. It is already established that there are no disconnects in the system, so the issue must be that there is more than one physical network.
  4. Select a section of duct to see that the System Name in Properties is FCU03 Supply.
  5. Select the VAV unit to see that the System Name is GS 1.

The VAV unit needs to be removed from the system GS 1.

  1. Position the cursor over the VAV unit and press the TAB key repeatedly until the system is highlighted as shown.
  • In the supply system, the VAV unit and system are selected and highlighted with dotted magenta lines.
  1. Select the system with the left mouse button, and then press Delete.

The issue has been resolved, and the warnings disappear.

  • A view of the supply system after resolving both issues shows no warnings.
  1. Select the warning triangle on the ventilation system to see that there is a flow direction mismatch, and the recommendation is to check the flow direction on all equipment in the system.
  • A zoomed-in view of the ventilation system, with a warning message indicating a flow direction mismatch.
  1. Close the warning.
  2. Select the extract grille.
  3. Click Edit Family.
  4. In the Family Editor, select the system connector.
  • The extract grille open in the Family Editor, with the system connector selected.
  1. In Properties, note the Flow Direction, which is set to In. For an extract grille, the flow direction should be set to Out.
  2. Change the flow direction to Out.
  • In Properties, the Flow Direction for the extract grille connector being changed from In to Out.
  1. Click Load into Project.
  2. Select Overwrite the existing version.

The change to the connector configuration in the family has resolved the issue, and the warning has disappeared.

  • A view of the ventilation system after resolving the issue shows no warnings.
  1. Save the project.