ABSTRACT
The pump is the “heart” of the waterside element of any HVAC system. This chapter describes pump control as it applies to several different common HVAC applications. It lists out some basic single pump applications, and explains typical control schemes. The chapter looks at pump systems, why they exist, and what can be done to adequately control them. It talks about pumping systems that utilize variable frequency drives, explores primary/secondary systems, touches upon their purpose and their need, and discusses the requirements for proper control. The chapter touches on system bypass control methods, when and why they are needed, and the pros and cons of implementing them. One of the most common applications for a single pump is “coil circulation.”.
