Home
Appendix
Dialogues and additional information
Design options (drinking water)
Drawing-specific settings relating to your calculation are set in the Design options dialogue.
Stagnation (drinking water design options)
In the Stagnation area under Validation, you can set the maximum stagnation time, among other things.

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.
    - Supply pressure (drinking water design options)
      The supply pressure under recording is divided into two areas. One is the information on the minimum supply pressure and the other is the determination of the resting pressure at the tapping points.
    - Pipes/insulation (design options for drinking water)
      The Pipes/Insulation section under Recording allows you to customise individual definitions for each section type.
    - Pipe series (design options for drinking water)
      The Pipe rows area under Recording provides an overview of individual pipe systems and enables individual adjustments to be made in the pipe system.
    - Types of utilisation drinking water (design options drinking water)
      The Usage types section under Recording allows you to select and manage individual usage types.
    - Calculation flow rates (drinking water design options)
      In the Calculation flow rates area under Recording, select whether the calculation flow rate from the reference values of DIN 1988-300 or from the stored manufacturer's specifications is used for the design.
    - Manufacturer catalogues (design options for drinking water)
      The links to the respective product sequence are defined by component category in the Manufacturer catalogues area under Entry. Prefixes for the labelling are also defined.
    - Stagnation (drinking water design options)
      In the Stagnation area under Validation, you can set the maximum stagnation time, among other things.
    - Flow velocities (design options for drinking water)
      The maximum permissible flow velocities per medium and section type are displayed in the Flow velocities area under Calculation.
    - Circulation (DHW design options)
      Calculation parameters for hot water and cold water circulation are specified in the Circulation area under Calculation.
    - Pressure boosting (design options for drinking water)
      In the Pressure boost ing area under Calculation, information on the average pressure drop and settings for the pressure boosting system are specified.
    - Apparatus (design options for drinking water)
      In the Apparatus section under Calculation, the maximum permissible apparatus pressure loss is specified for individual apparatus types.
    - General (Drinking water design options)
      In the General area under Material, you define settings that influence the material determination.
    - Component properties (design options for drinking water)
      In the component properties area under Material, settings for determining the material for the pre-wall elements are specified.
  - 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.
  - 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

Stagnation (drinking water design options)

In the Stagnation area under Validation, you can set the maximum stagnation time, among other things.

Make the corresponding settings in the Stagnation area.

Enter the maximum ratio of length to inner diameter.
Note:
If the ratio of length to inner diameter is greater than the entered value for a section that does not flow regularly, a warning message is displayed.
Enter the maximum stagnation time.
Enter the maximum ejection time. (See also 30-second rule)
Enter the maximum PWC temperature.
Select the output times from the drop-down menu, taking into account volume flow Vr, volume flow at rest pressure or volume flow at flow pressure.
Note:
Volume flow Vr: This setting is used for quick comparisons with rollover calculations. However, this is not recommended when calculating the ejection times, as the valve characteristic curve is not used here and the pressure at the calculated flow rate V_R may be below the resting pressure.
Volume flow at resting pressure: This setting is stored as the default setting, as it is necessary to have the water body at a standstill during an on-site test of the discharge times in order to obtain reproducible discharge times. When setting the resting pressure, the geodetic height is taken into account and it is checked that all sections have been in stagnation. It can be assumed that a large part of the network can be expected to have the largest extraction volume flow.
Volume flow at flow pressure: The minimum withdrawal volume flow is taken into account when considering the flow pressure, but this is only the case for short periods of time, as the flow pressure is only set taking into account the simultaneities in the network. In addition, operation is assumed here in which stagnation of the section is not guaranteed.
Attention:
The set pressure has an effect on the extraction volume flow in the calculation and in the flushing simulation.

Further information can be found on our YouTube channel.

You can access the video here