| Over the past
several decades, the control of heating and air conditioning
systems has undergone an evolution from mechanical to
electrical to electronic, and finally to computerized
technologies. In
order to troubleshoot and service all types of systems,
technicians and control professionals must have knowledge of
the full spectrum of control devices representing this
evolution.
The purpose of this
book is to provide the environmental control professional with
a clear understanding of the operation of electrical and
electronic components and systems that are utilized in control
functions.
The
interrelationship of electrical and magnetic control devices
in today's systems is clearly explained, as well as their
relationship to motors, contactors, relays, transformers and
semiconductor devices.
The authors present
logical techniques which can be readily used to analyze system
problems, and expedite their repair.
Examples throughout
the book present a variety of application, testing and
trouble-shooting scenarios for systems which employ
state-of-the-art technologies and meet current standards. |
