The purpose of this guide is to establish, in a general way, suitable procedures and tolerances for the installation of Pelton vertical turbines. This guide presents a typical assembly and whenever the word turbine is used in this part, it refers to a vertical Pelton turbine. There are many possible ways to assemble a unit. The size of the machine, the design of the machine, the layout of the powerhouse or the delivery schedule of the components are some of the elements that could result in additional steps, or the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. The guide excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. The tolerances in this guide have been established upon Best Practices and experience, although it is recognized that other standards are specifying different tolerances Wherever the guide specifies that documents, drawings or information shall be supplied by a manufacturer (or by manufacturers), each individual manufacturer shall be required to furnish the appropriate information for their own supply only.