Appending drawings with radiant system loops

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Product InstalSystem 5
Type of article FUNCTION AND TOOL
Source for translation 2022-08-30


The Heating-cooling surface component (floors and ceilings) can be appended with drawings of loops. Drawings generated automatically by the program are refreshed each time the project is recalculated. It is possible to modify or append them and loops can be drawn manually. Manual editing is recommended at the final stage of design.


We encourage you to see the video from our webinars presenting the possibilities of using the function described in this article:

Location in the program

  • General data - automatic generation of loops can be enabled for all components by selecting the Generate loops drawings checkbox.
    1. Generate loops drawings

  • Data table for component Heating/Cooling Floor Zone, when working in the Rad.-floors,walls/Rad.-ceilings editing range, enables:
    • automatic generation of loops by selecting the Generate loops drawings checkbox; loop generation can be disabled here for a selected component when this checkbox is selected in General data,
    • selection of pipe laying pattern.
      2. Pipe laying pattern

  • The RHC loop tool available in Main tools, when working in the Loop drawings-floor/Loop drawings-ceiling editing range, enables manual drawing of loops. Use of this tool is recommended with the AUTO mode and GRID mode enabled (the grid has two levels - large and small dots).
    3.Loop drawings - Graphical editing

Example of use

Automatic generation of loop drawings

  1. Enable Generate loops drawings in General data window or for selected components.
  2. Calculate the project Loops-calculation.png. Upon calculating the project, loop drawings will be generated automatically.
  3. Change direction of loop arrangement (option).
    After selecting Heating-cooling surface hotpoints of loop laying direction become available Direction.png, and in the case of Single pipe meander pattern/Double pipe meander pattern a pointer is also available Side.png for indicating the side along which meandering is to be done. To display the effect of changing the loop laying direction and of indicating other side, the file must be recalculated.

  1. Verify how the Heating-cooling surface components are filled with RHC loop component, in particular check that there are no empty spaces. It is possible to fill such areas with pipes at a spacing smaller than the one calculated/specified for the zone. The functioning of this mechanism can be verified for:
    • entire project - in the General data window on the Radiant systems - Additional options tab,
      4. Manner of drawing a loop for the entire project

    • the Heating/Cooling Floor Zone component, after selecting it, in the Data table window, field Pipe loops drawing manner.
      5. Manner of drawing a loop for the selected component Heating/Cooling Floor Zone

Manual editing of loop drawings

  1. Disable generation of loop drawings for selected components Heating-cooling surface.
    Attention! Clearing the Generate loops drawings option does not remove existing drawings of loops, it only freezes them in their current state and enables manual editing or deleting thereof. To completely remove loop drawings double left click the loop and select Delete selected components.
  2. Enable the GRID mode which helps in correcting or manual drawing of loops. Large grid nodes are arranged at a distance calculated/specified for the given surface, small grid nodes are arranged at the minimum distance allowable for the selected pipe laying pattern. Colours of grid nodes are repeated for the current pipe spacing, which facilitates drawing with the use of that spacing. The grid can be arranged parallel to selected edge of component Heating/Cooling Floor Zone by positioning on that edge the blue hot-point Hot-point-obrot.png. It becomes available when component Heating/Cooling Floor Zone is selected.
  3. Correct/draw manually selected segments of loop.
  4. Contain the entire loop drawn within the Heating-cooling surface and finish drawing at its border.

Manual editing may also be necessary in some design situations, when the automatically generated loop is incorrect. The most common flaws include:

  • start and end of loop drawing cross over,
  • inconsistent pipe spacing in the loop,
  • asymmetrical arrangement of the loop drawing in adjacent Heating-cooling surface components,
  • incorrect drawings of pipe feed to loop connection points.

In each of these cases it is possible to manually fix the drawings as shown in the videos below.

Start and end of loop drawing cross over

Change the direction of drawing the loop or change the location of pipe feed connections.

Inconsistent pipe spacing in the loop

When the Heating-cooling surface is filled incorrectly (e.g. when there are different pipe spacings within one loop or when adjacent surfaces are filled asymmetrically), do the following:

  • Mark the Adjust loops to grid in the Data table of the Heating-cooling surface
  • Enable GRID
  • If necessary, adjust the size of the Heating-cooling surface.

Incorrect drawings of pipe feed to loop connection points

Change the location of pipe feed connection points.

Incorrect generation of pipe spacing

Change of pipe spacing.

Manual editing of loop drawings in dry systems with guide plates

In the case of dry floor systems with arranged Dry system plate components from a catalogue, the role of the grid used for controlling proper routing of the loop is taken on by characteristic points of the plates. For more information, see: Inserting plates in dry floor heating system.

In order to generate loop drawings the following settings must be made in the General data window:

  • On the Floor systems tab enable the Generate loops drawings option and select Single pipe meander pattern in the Pipe laying pattern field.
  • (Optionally) On the Additional options tab enable the Take into account in calculations: drawing loop length option. For more information, see: How to include the drawing loop length in the calculations?.

After the project is calculated the routing of the pipes in relation to the grooves in the Dry system plate components should be verified. If necessary, edit manually the generated loops following these guidelines:

  • Change the side along which meandering is to be effected and change the direction of loop arrangement. For more information, see: Automatic generation of loop drawings.
  • Disable Automatic division of heating zone and manually change the arrangement of division lines.
  • Disable Generate loops drawings in the Data table window for selected Heating/cooling floor components and manually change/append the loop drawings:
    • Enable the GRID mode to display the characteristic points of dry system plates.
    • Adjust the position of the loop (of its individual segments or many segments marked as a group) in relation to the characteristic points and grooves in plates. When the GRID and AUTO modes are enabled, the moved loop segments will snap to the characteristic points of dry system plates.
    • If necessary, manually draw loop segments using the RHC loop component from the Main tools bar in section Radiant for the enabled Loop drawings-floor scope.

Attention! In order to verify the effects of the changes made it is necessary to recalculate the project file.

Additional information

  • RHC loop has its place in the Component appearance and descriptions configuration tree. In order to improve the legibility of loop printouts, the following settings can be checked in Coil configuration:
    • Different circuit colours
    • Pipefeeds use same colour as coil.
6. Component appearance and descriptions configuration - RHC loop

7. Different circuit colours

  • Loop drawings are not mandatory and they do not have to be complete if the Take into account in calculations: drawing loop length option has not been selected.
  • In the case of virtual connections, automatically generated loops originate from arbitrary points indicated by the program. After pipe feeds are drawn, the starting points of loops are automatically relocated. The loop drawings can also be automatically modified due to the routes of pipe feeds to other areas/rooms being taken into account.
  • Pipe laying pattern can be changed for the entire project on the General data tab or for a single Heating/cooling floor.