Electricity and Controls for HVAC-R, Sixth Edition pdf
Electricity and Controls for HVAC/R is written with the assumption that the student has no prior knowledge of electricity or control systems. Basic electrical theory is presented in a practical, straightforward manner. Mathematical explanations are used only when necessary to explain certain concepts of electricity. Each unit starts with the objectives of the unit and ends with a summary of important facts. The text begins with the study of basic electrical theory and progresses to series circuits, parallel circuits, alternating current, inductive circuits, and capacitive circuits. The text also includes information on different types of three phase services found in industrial and commercial locations as well as single-phase residential services. Individual devices and components common to the air conditioning, heating, and refrigeration field are presented in a practical manner. Devices are explained from a standpoint of how they operate and how they are used. The text contains testing procedures for many of the devices covered. The practical presentation of these devices makes this text a must-have reference book for the service technician working in the field.
Electricity and Controls for HVAC/R, sixth edition, includes information on isolation transformers, autotransformers, and current transformers. The three major types of three-phase motors—squirrel cage induction, wound rotor, and synchronous— are also covered. Coverage of single-phase motors includes split-phase motors, resistance-start induction-run motors, capacitor-start induction run motors, and permanent-split capacitor motors. Shaded-pole induction motors and multispeed motors are also covered. The sixth edition also provides information on variable-frequency drives. Control circuits are developed using the components in the text. The text assumes that the student has no prior knowledge of control systems.
Operation of the manufacturer’s control schematics is explained to aid the student in understanding how a control system operates and how to troubleshoot the system. Electricity and Controls for HVAC/R, sixth edition, includes information on household and commercial icemaker controls. These circuits are explained in a step-by-step procedure to ensure that students have a thorough working knowledge of these units. Solid-state devices common to the HVAC/R fi eld are covered in a straightforward manner. The devices covered are: diode, transistor, SCR, diac,triac, and operational amplifier. The last section of the text covers programmable logic controllers, which are becoming more and more common in the field.
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