Electricity & Controls for HVAC-R, 4E

by Herman, Stephen; Sparkman, Bennie

• ISBN13: 9780766817388
• ISBN10: 0766817385
• Edition: 1st
• Format: Paperback
• Copyright: 2000-07-31
• Publisher: CENGAGE Delmar Learning

Summary

Now in its fourth edition, Electricity and Controls for HVAC/R equips readers with the information needed to work effectively with all types of motors and control devices found in the heating and air conditioning industry. Prior knowledge of electricity is not required as this book begins with discussion of essential basic electricity and electrical circuits concepts. Numerous schematic diagrams, plus step-by-step troubleshooting procedures, are included to acquaint readers with all of the different types of circuits commonly encountered in the HVAC-R field. With an eimphasis on electrical safety, plus an all-new troubleshooting unit, this edition of Electricity and Controls for HVAC/R also features expanded information on thermostats, short cycle timers, heat pressure controls for refrigeration, variable frequency drives, and more!

Table of Contents

Preface	v
SECTION 1 BASIC ELECTRICITY	1	(76)
Safety	2	(4)
Atomic Structure	6	(5)
Electrical Quantities and Ohm's Law	11	(9)
Measuring Instruments	20	(10)
Electrical Circuits	30	(12)
Electrical Services	42	(12)
Wire Size and Voltage Drop	54	(8)
Inductance	62	(6)
Capacitance	68	(9)
SECTION 2 CONTROL CIRCUITS	77	(26)
Schematics and Wiring Diagrams	78	(15)
Developing Wiring Diagrams	93	(10)
SECTION 3 SINGLE-PHASE MOTORS	103	(28)
Split-Phase Motors	104	(10)
The Shaded-Pole Induction Motor	114	(4)
Multispeed Motors	118	(13)
SECTION 4 THREE-PHASE MOTORS	131	(44)
Three-Phase Motor Principles	132	(11)
The Squirrel-Cage Induction Motor	143	(19)
The Wound Rotor Induction Motor	162	(7)
The Synchronous Motor	169	(6)
SECTION 5 TRANSFORMERS	175	(34)
Isolation Transformers	176	(21)
Autotransformers	197	(6)
Current Transformers	203	(6)
SECTION 6 CONTROL COMPONENTS	209	(114)
Overloads	210	(6)
Relays, Contactors, and Motor Starters	216	(5)
The Solid-State Relay	221	(3)
The Control Transformer	224	(7)
Starting Relays	231	(10)
Variable-Speed Motor Control	241	(4)
The Defrost Timer	245	(8)
The Thermostat	253	(15)
Pressure Switches	268	(5)
The Flow Switch	273	(3)
The Humidistat	276	(2)
Fan-Limit Switches	278	(5)
The Oil-Pressure Failure Switch	283	(4)
Solenoid Valves	287	(5)
The Short-Cycle Timer	292	(11)
Methods of Sensing Temperature	303	(8)
Gas Burner Controls	311	(6)
Oil Burner Controls	317	(6)
SECTION 7 TROUBLESHOOTING USING CONTROL SCHEMATICS	323	(50)
Introduction to Troubleshooting	324	(14)
Room Air Conditioners	338	(6)
A Commercial Air-Conditioning Unit	344	(5)
Heat-Pump Controls	349	(11)
Packaged Units: Electric Air Conditioning and Gas Heat	360	(13)
SECTION 8 ICE MAKER AND REFRIGERATION CONTROLS	373	(48)
Household Ice Makers	374	(21)
Commercial Ice Makers	395	(16)
Refrigeration Controls	411	(10)
SECTION 9 SOLID-STATE DEVICES	421	(56)
Resistors and Color Codes	422	(7)
Semiconductor Materials	429	(5)
The PN Junction	434	(5)
The Light-Emitting Diode	439	(2)
The Transistor	441	(6)
The Unijunction Transistor	447	(4)
The Silicon-Controlled Rectifier	451	(7)
The Diac	458	(2)
The Triac	460	(5)
The Operational Amplifier	465	(12)
SECTION 10 SOLID-STATE CONTROLS	477	(20)
Programmable Controllers	478	(9)
Programming a PC	487	(7)
Analog Sensing for Programmable Controllers	494	(3)
Glossary	497	(16)
Index	513