Every task that creates new parts in the model must assign a part name to each new part.
In the Equipment and Furnishings task, the part name is automatically generated using the default name rule when you place the part. The name consists of the part number of the equipment and a random number. The part number is defined on the part class worksheet in Equipment.xls.
You can change the part name on the Occurrence Tab (Nozzle Properties Dialog) for each part. When you override the automatically generated part name in the Name box on the Occurrence tab, the text in the Rule box changes to User Defined.