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Appendix
Dialogues and additional information
Simulation
The simulation is divided into a circulation simulation for hot and cold water and a simulation of a cold water hygiene system.
Cold Water Hygiene System
Basics of simulating a cold water hygiene system
Hygiene system messages
Various messages can appear in the messages during the simulation, which are explained below.

Appendix
- Dialogues and additional information
  - Wastewater lifting unit
  - Design options (waste water)
    Drawing-specific settings relating to your calculation are set in the Design options dialogue.
  - Design options (heating)
    Drawing-specific settings relating to your calculation are set in the Design options dialogue.
  - Design options (drinking water)
    Drawing-specific settings relating to your calculation are set in the Design options dialogue.
  - Construction stages
    You can divide a drawing into construction stages so that you can later create a material extract according to construction stages.
  - Component properties
    In the Edit and Calculate work perspective, your selection in the drawing is highlighted in colour. Section properties and component properties can be displayed and edited differently from the global project settings.
  - Component filter
    The component filter allows you to quickly filter the selected components in the drawing.
  - Drainage areas
    The Drainage areas window in the Drainage section is divided into two tabs.
  - Find function
    CALHYDRA has a parameterised search function that supports you when searching for drawn sections and components in the drawing and when selecting products.
  - Hydraulics report
    With the preview of the calculation output, CALHYDRA supports you in customising the calculation output.
  - Mass extract
    With the preview of the mass statement, CALHYDRA supports you in customising the printout of the masses.
  - Material editor
    With the material editor, CALHYDRA supports you with convenient and fast determination of your dimensions.
  - Diaphragm expansion vessel
  - Options Wizard (waste water)
    The options wizard guides you through the settings for the design.
  - Options assistant (heating)
    The options wizard guides you through the settings for the design.
  - Options Wizard (drinking water)
    The options wizard guides you through the settings for the design.
  - Project data
    The Project data dialogue contains project information for the current project, for example for the project cover sheet or to determine the rainfall donations.
  - Product sequence or product selection
    In the Product sequence or Product selection dialogue, select the product sequence or a product for components.
  - Project data
    The Project data dialogue contains project information for the current project, for example for the project cover sheet or to determine the rainfall donations.
  - Simulation
    The simulation is divided into a circulation simulation for hot and cold water and a simulation of a cold water hygiene system.
    - Circulation simulation
      Basics of circulation simulation
    - Cold Water Hygiene System
      Basics of simulating a cold water hygiene system
      - Flow splitter
        Displays the flow splitters and their details in the currently selected flow path
      - Hygiene system messages
        Various messages can appear in the messages during the simulation, which are explained below.
    - Simulation report
      With the preview of the calculation output, CALHYDRA supports you in customising the calculation output.
  - Section properties
    In the Edit and Calculate work perspective, your selection in the drawing is highlighted in colour. Section properties and component properties can be displayed and edited differently from the global project settings.
  - Insert drawing reference
    The Insert drawing reference function guides you through the settings for inserting a drawing reference.
  - Water softening system

Hygiene system messages

Various messages can appear in the messages during the simulation, which are explained below.

Flush time exceeded: To avoid unrealistically long flush times, a corresponding message is issued if a set limit value is exceeded. The limit value is related to each individual flush and not to the total flush. If you want to change this limit value for the current project, you can adjust the limit value in the project settings. If the flush time is too long, you should check the dimesions, pipe lengths and the selected flushing technology (flush valves, sanitary flush, etc.).
Maximum flow velocity exceeded: To avoid noise generation, flow velocities of more than 3.0 m/s should not occur during flushing. If this value is exceeded in a network, this message is displayed for the corresponding flow path. If you want to change this limit value for the current project, you can adjust the limit value in the project settings.
Note:
When transferring a pipe network from CALHYDRA, the pipe network simulation attempts to maintain the flow velocities by selecting the correct flush valves. If this is not successful, this message is displayed.