The Flush Sequence Manager is used to specify sequencing and view sequence results within a flush zone. Click from the UDF toolbar to open the Flush Sequence Manager.

The General tab specifies the pipes flushed in each sequence as well as the time and duration of flushing. Information is displayed for the currently highlighted sequence. 

Toolbar

New - Creates a new flush zone sequence.

Insert Sequence - Inserts a new sequence in the list and renumbers all subsequent sequences in the list.

Delete - Deletes the currently highlighted sequence and renumbers all subsequent sequences in the list.

Save - Saves the currently highlighted record.

Isolate Target Pipes - Click on this button to automatically populate the Valves to Operate table. There are three constraints that must be obeyed to use this tool. A warning will be issued if any of the three constraints, listed here, are violated:

    1. There is only one flow path among the pipes defined for flushing (i.e., pipes in the current flush sequence must be in series without branches).

    2. The sequence is continuous (i.e., all pipes in the current flush sequence are connected).

    3. The sequence starts from a clean water source (i.e., a tank, reservoir, or previously flushed sequence).

Zoom to Active Sequence - Zoom to the currently selected sequence.

Status - Summarizes the status of the simulation.

Green - No warnings or errors. The simulation was successful.

Yellow - Warning message was generated. Warning messages are generated when the simulation results are found to exceed one or more characteristics defined by the flush zone or there was an error with the hydraulic simulation. If a warning message is generated, one of the following results occurred:

      • A hydraulic warning was detected by the simulation engine.

      • The pressure of any junction in current flush zone falls below the required minimum pressure.

      • The flushing hydrant’s residual pressure is below the required minimum residual pressure.

      • The velocity of any flush pipe falls below the required minimum flush velocity.

      • Total flush length exceeds the specified (non-zero) maximum flush length.

      • Flush volume is greater than the specified (non-zero) maximum flush volume.

      • Flush time is less than the computed minimum flushing time.

Grey - The simulation has not been run or was unsuccessful.

 Warnings do not affect the results of flush sequences. They simply inform the user that the simulation results do not meet the specified characteristics.


Run
- Click on this button to run a simulation of the currently highlighted sequence. Simulations may only be performed within the Flush Sequence Manager.

Batch Run - Click on this button to run a simulation for a group of continuous sequences in the current flush zone. Simulations may only be performed within the Flush Sequence Manager.

Export to Excel - Export the following information for all sequences in the current flush zone into Microsoft Excel:

      • Sequence ID

      • Description of the sequence operations:

        • Pipes flushed during the current sequence

        • ID's of valves and hydrants operated for the current sequence

      • Parameters Data - Model and Field Results

      • This tool is only found in the Flush Sequence Manager.

OK - Select OK to save any change and close the dialog.

Cancel - Select Cancel to close the dialog without saving any changes.

Sequences

Sequence - Lists all sequences within the current flush zone

Description - Description for each sequence within the current flush zone. The description is always "Sequence" + ID and cannot be modified.

General Tab

Flush Zone ID - All sequences in the Flush Sequence Manager are part of this flush zone.  When the Flush Zone Manager is opened, all sequences are displayed for the current flush zone. To view sequences from another flush zone, close the Flush Sequence Manager and change the current flush zone using the UDF toolbar selection box.

Date - The flushing date - for information only. This field is not required to run a UDF simulation.

Start Flush Time - The system conditions calculated from a standard EPS hydraulic simulation will be used for calculations during the UDF simulation. This EPS simulation will be performed until the time indicated here.  If the time entered does not correspond to a hydraulic time step of the standard EPS simulation, an additional calculation will be performed at the time indicated here.

Number of Turnovers - Enter the number of times the pipe volume (pipe area x length) is to be flushed from the main. If this value is exceeded, a warning is reported.

Total Flush Time - The total time the hydrant will be open during the corresponding sequence. If this value is exceeded, a warning is reported.

Target Pipes - The pipes being flushed during the corresponding sequence. If any target pipe does not achieve the specified Minimum Flush Velocity, a warning will be generated.

Select - Graphically select a pipe from the map view to insert into the Target Pipe box.

Remove - Remove the currently highlighted pipe from the Target Pipe box.

Delete - Delete the currently highlighted ID from the Target Pipe box.

Clear - Remove all IDs from the Target Pipe box.

Validate - Sort and validate pipe sequence to make sure all of the selected pipes are connected to each other and in proper sequence.

Add Pipe - Type a pipe ID into this box and then click on the Add Pipe button to insert it into the Target Pipes box.