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  • To conduct a variable speed pump analysis, from the InfoWater Pro button ->Analysis menu, select Run Manager to display the Run Manager dialog box. From the Standard tab, select the VSP/FPP Analysis button to launch the Variable Speed Pump dialog box.

  • The Data Tab allows you to input VSP Model parameters.  Enter the Pump ID for which the VSP Analysis is to be conducted.  More More than one pump can be analyzed during a VSP simulation.

  • Specify the minimum pump speed to be utilized during the VSP Analysis.  This This is the minimum value that will be employed by InfoWater Pro.

  • The maximum pump speed to be utilized during the VSP Analysis.  This This is the maximum value that will be employed by InfoWater Pro.

  • Specify the Target Node ID. This is an optional field. Specify the target junction node here where the desired target pressure is to be maintained. The speed of the pump for which a VSP analysis is being carried out will be varied to maintain the specified target pressure at this junction. This target junction may be located anywhere in your system and has to be unique for each VSP pump when multiple VSP analysis is run. If the Target Node ID entry is left blank (no entry), then InfoWater Pro will assume that the pump discharge node is that the target node and the desired pressure will be maintained at that location.

  • Specify the target pressure to be maintained at the target node ID during the VSP Analysis. InfoWater Pro will calculate the pump speed between the min. and max. values to maintain the specified pressure at the target junction node.

  • For an EPS, the target pressure can be specified to vary during the simulation period as a time pattern.  In In that case, the time pattern ID should be specified in the Pressure Pattern ID field.

  • Once the above data are specified, click Run to initialize the VSP Analysis.  The The results are then displayed as shown in the Report dialog box. The red color indicates that the pump is off while the green represents normal pump operation and the corresponding results (speed setting, discharge flow and discharge pressure) are shown in the associated columns.