Electricity for Refrigeration, Heating, And Air Conditioning

by Smith, Russell E.

• ISBN13: 9781418042875
• ISBN10: 1418042870
• Additional ISBN(s): 9780766873377, 9781111038748
• Edition: 7th
• Format: Paperback
• Copyright: 2006-08-17
• Publisher: CENGAGE Delmar Learning
• More Book Details
• Purchase Benefits

Summary

Ideal for students and beginning technicians, Electricity for Refrigeration, Heating and Air Conditioning, 7E zeroes in on the basic electrical principles necessary to understand today's modern control systems. This extraordinarily practical approach allows readers to focus exclusively on the electronics information they will use in the field, without bogging them down in unnecessary theory. Chapter 9 includes new information on motor frames and electronically commutated motors, ECM. Such as the circuits being discussed in schematic diagrams, as well as the direction of the current flow within circuits. As in past editions, emphasis is on developing systematic diagnosis and troubleshooting methods and procedures in order to enable readers to become highly-skilled, professional HVAC-R service technicians. A comprehensive glossary is also included to assist those who are new to the field in understanding and using industry terms.

Table of Contents

Preface	vi
Electrical Safety	1	(16)
Objectives	1	(1)
Key Terms	1	(1)
Introduction	1	(1)
Electrical Injuries	2	(4)
Dealing with Shock Victims	6	(1)
National Electrical Code®	7	(1)
Electrical Grounding	8	(3)
Circuit Protection	11	(2)
Circuit Lockout Procedures	13	(1)
Electrical Safety Guidelines	14	(1)
Summary	14	(1)
Review Questions	15	(2)
Basic Electricity	17	(21)
Objectives	17	(1)
Key Terms	17	(1)
Introduction	18	(1)
Atomic Theory	18	(2)
Positive and Negative Charges	20	(1)
Flow of Electrons	21	(3)
Conductors and Insulators	24	(1)
Electric Potential	25	(1)
Current Flow	26	(1)
Resistance	27	(1)
Electric Power and Energy	28	(3)
Ohm's Law	31	(2)
Calculating Electric Power	33	(1)
Summary	34	(1)
Review Questions	35	(3)
Electric Circuits	38	(16)
Objectives	38	(1)
Key Terms	38	(1)
Introduction	39	(1)
Basic Concepts of Electric Circuits	39	(2)
Series Circuits	41	(4)
Parallel Circuits	45	(4)
Series-Parallel Circuits	49	(2)
Summary	51	(1)
Review Questions	52	(2)
Electric Meters	54	(20)
Objectives	54	(1)
Key Terms	54	(1)
Introduction	55	(1)
Electric Meters	56	(5)
Ammeters	61	(4)
Voltmeters	65	(3)
Ohmmeters	68	(3)
Summary	71	(1)
Review Questions	72	(2)
Components, Symbols, and Circuitry of Air-Conditioning Wiring Diagrams	74	(27)
Objectives	74	(1)
Key Terms	75	(1)
Introduction	75	(1)
Loads	76	(4)
Contactors and Relays	80	(4)
Magnetic Starters	84	(1)
Switches	84	(4)
Safety Devices	88	(2)
Transformers	90	(1)
Schematic Diagrams	91	(3)
Pictorial Diagrams	94	(1)
Installation Diagrams	94	(1)
Summary	94	(4)
Review Questions	98	(3)
Reading Schematic Diagrams	101	(76)
Objectives	101	(1)
Key Terms	101	(1)
Introduction	102	(1)
Schematic Diagram Design	103	(8)
Reading Basic Schematic Diagrams	111	(17)
Reading Advanced Schematic Diagrams	128	(44)
Summary	172	(1)
Review Questions	173	(4)
Alternating Current, Power Distribution, and Voltage Systems	177	(18)
Objectives	177	(1)
Key Terms	177	(1)
Introduction	177	(1)
Basic Concepts of Alternating Current	178	(5)
Power Distribution	183	(2)
240-Volt--Single-Phase--60-Hertz Systems	185	(1)
Three-Phase Voltage Systems	186	(1)
240-Volt--Three-Phase--60-Hertz Delta System	187	(1)
208-Volt--Three-Phase--60-Hertz Wye System	188	(2)
Higher-Voltage Systems	190	(2)
Summary	192	(1)
Review Questions	193	(2)
Installation of Heating, Cooling, and Refrigeration Systems	195	(26)
Objectives	195	(1)
Key Terms	195	(1)
Introduction	196	(1)
Sizing Wire	196	(8)
Disconnect Switches	204	(2)
Fusible Load Centers	206	(1)
Breaker Panels	207	(4)
Distribution Centers	211	(1)
Installing Electrical Circuits For Refrigeration, Heating, and Air-Conditioning Equipment	212	(5)
Summary	217	(1)
Review Questions	218	(3)
Basic Electric Motors	221	(61)
Objectives	221	(1)
Key Terms	222	(1)
Introduction	222	(1)
Magnetism	222	(3)
Basic Electric Motor	225	(2)
Types of Electric Motors	227	(2)
Shaded-Pole Motors	229	(4)
Capacitors	233	(4)
Split-Phase Motors	237	(6)
Permanent Split-Capacitor Motors	243	(3)
Capacitor-Start--Capacitor-Run Motors	246	(1)
Three-Phase Motors	247	(3)
Electronically Commutated Motors	250	(6)
Hermetic Compressor Motors	256	(10)
Service Call Protocol	266	(2)
Service Calls	268	(6)
Summary	274	(2)
Review Questions	276	(3)
Practice Service Calls	279	(3)
Components for Electric Motors	282	(32)
Objectives	282	(1)
Key Terms	282	(1)
Introduction	283	(1)
Starting Relays for Single-Phase Motors	283	(1)
Current or Amperage Relays	284	(3)
Potential Relays	287	(6)
Solid-State Starting Relays and Devices	293	(5)
Motor Bearings	298	(2)
Motor Drives	300	(3)
Service Calls	303	(5)
Summary	308	(1)
Review Questions	309	(2)
Practice Service Calls	311	(3)
Contactors, Relays, and Overloads	314	(37)
Objectives	314	(1)
Key Terms	314	(1)
Introduction	315	(1)
Contactors	316	(5)
Relays	321	(6)
Overloads	327	(9)
Magnetic Starters	336	(4)
Push-Button Stations	340	(1)
Service Calls	341	(4)
Summary	345	(2)
Review Questions	347	(1)
Practice Service Calls	348	(3)
Thermostats, Pressure Switches, and Other Electric Control Devices	351	(47)
Objectives	351	(1)
Key Terms	352	(1)
Introduction	352	(1)
Transformers	353	(2)
Thermostats	355	(15)
Staging Thermostats	370	(4)
Clock Thermostats	374	(5)
Pressure Switches	379	(4)
Miscellaneous Electric Components	383	(4)
Service Calls	387	(5)
Summary	392	(1)
Review Questions	393	(2)
Practice Service Calls	395	(3)
Heating Control Devices	398	(51)
Objectives	398	(1)
Key Terms	398	(1)
Introduction	399	(1)
Heating Fundamentals	400	(3)
Basic Heating Controls	403	(8)
Gas Heating Controls	411	(14)
Oil Heating Controls	425	(8)
Electric Heating Controls	433	(2)
Hydronic and Steam Controls	435	(3)
Service Calls	438	(4)
Summary	442	(2)
Review Questions	444	(2)
Practice Service Calls	446	(3)
Troubleshooting Electric Control Devices	449	(50)
Objectives	449	(1)
Key Terms	449	(1)
Introduction	449	(1)
Electric Motors	450	(2)
Contactors and Relays	452	(2)
Overloads	454	(7)
Thermostats	461	(3)
Pressure Switches	464	(2)
Transformers	466	(1)
Electric Heating Controls	467	(3)
Gas Heating Controls	470	(9)
Oil Heating Controls	479	(4)
Service Calls	483	(6)
Summary	489	(2)
Review Questions	491	(2)
Practice Service Calls	493	(6)
Air-Conditioning Control Systems	499	(27)
Objectives	499	(1)
Key Terms	499	(1)
Introduction	499	(2)
Basic Condensing Units	501	(5)
Packaged Units	506	(8)
Field Wiring	514	(8)
Summary	522	(1)
Review Questions	523	(3)
Control Systems Circuitry	526	(28)
Objectives	526	(1)
Key Terms	526	(1)
Introduction	526	(1)
Basic Control Circuits	527	(5)
Total Control System of Residential Units	532	(1)
Advanced Control Systems	533	(9)
Methods of Control on Advanced Systems	542	(4)
Total Commercial and Industrial Control Systems	546	(3)
Summary	549	(1)
Review Questions	550	(4)
Troubleshooting Modern Refrigeration, Heating, and Air-Conditioning Control Circuitry and Systems	554	(52)
Objectives	554	(1)
Key Terms	554	(1)
Introduction	555	(1)
Diagnosis of Electrical Components	556	(2)
Troubleshooting Tools	558	(11)
Troubleshooting with Electrical Meters	569	(5)
Using Troubleshooting Charts	574	(6)
Hopscotching: A Useful Tool for Troubleshooting	580	(4)
Troubleshooting Control Systems	584	(8)
Service Calls	592	(6)
Summary	598	(1)
Review Questions	599	(3)
Practice Service Calls	602	(4)
Solid-State Controls and Systems	606	(31)
Objectives	606	(1)
Key Terms	606	(1)
Introduction	607	(1)
Electronic System Components	608	(5)
Basic Electronic Control Fundamentals	613	(2)
Basic Electronic Controls	615	(12)
Basic Electronic Control Systems Used in Residential Conditioned Air Systems	627	(3)
Advanced Electronic Controls	630	(3)
Troubleshooting Electronic Controls	633	(1)
Summary	633	(2)
Review Questions	635	(2)
Appendix A	637	(2)
Glossary	639	(10)
Index	649