Part I of this series introduced the lead/lag control strategy as it applies to parallel pump operation and discussed the need for identifying the designer’s intent for a particular system. Part II discussed aspects of the control sequence a commissioning provider should pay attention to during reviews of such sequences. This article will discuss considerations for the functional testing and optimization of lead/lag pumping operations.
The sequence of operation analyzed during Part II has again been made available (see sidebar, “Example lead/lag sequence of operation”) and will be referenced throughout this article.