Use the following information to troubleshoot issues with hydraulic separation in hydronic networks.
| Warning Message with Solution | Explanation |
|---|---|
Hydraulic separation requires an even number of junctions on the header pipe for accurate calculations. Add or remove junctions to complete the separation.
 |
There should be an equal number of secondary branches on each side of the common pipe in a primary header or loop. In addition, the number of primary and secondary branches on each side of a header should be balanced. |
This hydraulic loop is not separated at any junction. Use the
Remove Separation tool to clean up undesired hydraulic separations.
 |
This can happen when one side of the loop is separated, but the other side is not. The warning appears at the terminal joining the two sides. |
Only one side of the secondary/tertiary loop is separated. To correctly calculate the flow and pressure loss,
add separation to the other end of the loop.
 |
The pipes at both the start and end of a loop need to have separation applied for the calculations of the loops to take into account the proper elements. |
The calculated pressure drop of this pump is not computed because the critical path is not a closed loop. Check to see if there are other pumps intended for use within a secondary/tertiary loop. Use the
Add Separation tool to define the secondary/tertiary loop.
 |
This condition is usually due to multiple pumps existing in a loop or system. If the pumps belong to separate loops, hydraulic separation may need to be applied. If the pumps run in parallel, a pump set may need to be created. |
The following table provides troubleshooting information related to hydraulic separation.
| Issue | Solution |
|---|---|
| After hydraulically separating a secondary header, the hierarchy in the System Browser is not correct or the reviewable warnings related to the loop are not easily corrected. |
The systems (supply and return) may not have been assigned correctly to the pipes on the primary loop or header. The supply and return sides need to be continuous. For example, if the entire header is set to the supply system and the return is made up of 2 systems before separation, the new secondary system created after separation may not be valid, affecting the calculations and system hierarchy. For details, review the video below. |