Electricity for Refrigeration, Heating and Air Conditioning

by SMITH

• ISBN13: 9780766873377
• ISBN10: 0766873374
• Format: Paperback
• Copyright: 2002-07-15
• Publisher: CENGAGE Delmar Learning

Summary

Ideal for students and beginning technicians, Electricity for Refrigeration, Heating and Air Conditioning, 6E 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. Newly-updated in direct response to user feedback, this edition now features all-new chapters on electrical safety, reading wiring diagrams, and troubleshooting modern HVAC-R control systems and circuitry. A second color has also been added throughout the book to highlight "must-know" information for readers, 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

Table of Contents

Preface	vi
Electrical Safety	1	(16)
Objectives	1	(1)
Key Terms	1	(1)
Introduction	1	(13)
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	13	(1)
Summary	14	(1)
Review Questions	14	(3)
Basic Electricity	17	(21)
Objectives	17	(1)
Key Terms	17	(1)
Introduction	18	(16)
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	(12)
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	(16)
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	(19)
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	(70)
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	(15)
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	(21)
Sizing Wire	196	(7)
Disconnect Switches	203	(4)
Fusible Load Centers	207	(1)
Breaker Panels	208	(3)
Distribution Centers	211	(2)
Installing Electrical Circuits for Refrigeration, Heating, and Air-Conditioning Equipment	213	(4)
Summary	217	(1)
Review Questions	218	(3)
Basic Electric Motors	221	(55)
Objectives	221	(1)
Key Terms	222	(1)
Introduction	222	(45)
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)
Hermetic Compressor Motors	250	(9)
Service Call Protocol	259	(2)
Service Calls	261	(6)
Summary	267	(2)
Review Questions	269	(4)
Practice Service Calls	273	(3)
Components for Electric Motors	276	(34)
Objectives	276	(1)
Key Terms	276	(1)
Introduction	277	(27)
Starting Relays for Single-Phase Motors	277	(1)
Current or Amperage Relays	278	(3)
Potential Relays	281	(6)
Hot-Wire Relays	287	(1)
Solid-State Starting Relays and Devices	288	(6)
Motor Bearings	294	(2)
Motor Drives	296	(3)
Service Calls	299	(5)
Summary	304	(1)
Review Questions	305	(2)
Practice Service Calls	307	(3)
Contactors, Relays, and Overloads	310	(37)
Objectives	310	(1)
Key Terms	310	(1)
Introduction	311	(30)
Contactors	312	(5)
Relays	317	(6)
Overloads	323	(9)
Magnetic Starters	332	(4)
Push-Button Stations	336	(1)
Service Calls	337	(4)
Summary	341	(2)
Review Questions	343	(1)
Practice Service Calls	344	(3)
Thermostats, Pressure Switches, and Other Electric Control Devices	347	(48)
Objectives	347	(1)
Key Terms	348	(1)
Introduction	348	(41)
Transformers	349	(2)
Thermostats	351	(15)
Staging Thermostats	366	(4)
Clock Thermostats	370	(6)
Pressure Switches	376	(4)
Miscellaneous Electric Components	380	(4)
Service Calls	384	(5)
Summary	389	(1)
Review Questions	390	(2)
Practice Service Calls	392	(3)
Heating Control Devices	395	(48)
Objectives	395	(1)
Key Terms	395	(1)
Introduction	396	(40)
Heating Fundamentals	397	(3)
Basic Heating Controls	400	(7)
Gas Heating Controls	407	(12)
Oil Heating Controls	419	(8)
Electric Heating Controls	427	(2)
Hydronic and Steam Controls	429	(3)
Service Calls	432	(4)
Summary	436	(2)
Review Questions	438	(2)
Practice Service Calls	440	(3)
Troubleshooting Electric Control Devices	443	(50)
Objectives	443	(1)
Key Terms	443	(1)
Introduction	443	(40)
Electric Motors	444	(2)
Contactors and Relays	446	(2)
Overloads	448	(7)
Thermostats	455	(3)
Pressure Switches	458	(2)
Transformers	460	(1)
Electric Heating Controls	461	(3)
Gas Heating Controls	464	(9)
Oil Heating Controls	473	(4)
Service Calls	477	(6)
Summary	483	(2)
Review Questions	485	(2)
Practice Service Calls	487	(6)
Air-Conditioning Control Systems	493	(27)
Objectives	493	(1)
Key Terms	493	(1)
Introduction	493	(23)
Basic Condensing Units	495	(5)
Packaged Units	500	(8)
Field Wiring	508	(8)
Summary	516	(1)
Review Questions	517	(3)
Control Systems: Circuitry	520	(28)
Objectives	520	(1)
Key Terms	520	(1)
Introduction	520	(23)
Basic Control Circuits	521	(5)
Total Control System of Residential Units	526	(1)
Advanced Control Systems	527	(9)
Methods of Control on Advanced Systems	536	(4)
Total Commercial and Industrial Control Systems	540	(3)
Summary	543	(1)
Review Questions	544	(4)
Troubleshooting Modern Refrigeration, Heating, and Air-Conditioning Control Circuitry and Systems	548	(52)
Objectives	548	(1)
Key Terms	548	(1)
Introduction	549	(43)
Diagnosis of Electrical Components	550	(2)
Troubleshooting Tools	552	(11)
Troubleshooting with Electrical Meters	563	(5)
Using Troubleshooting Charts	568	(6)
Hopscotching: A Useful Tool for Troubleshooting	574	(4)
Troubleshooting Control Systems	578	(8)
Service Calls	586	(6)
Summary	592	(1)
Review Questions	593	(3)
Practice Service Calls	596	(4)
Solid-State Controls and Systems	600	(31)
Objectives	600	(1)
Key Terms	600	(1)
Introduction	601	(26)
Electronic System Components	602	(5)
Basic Electronic Control Fundamentals	607	(2)
Basic Electronic Controls	609	(12)
Basic Electronic Control Systems Used in Residential Conditioned Air Systems	621	(3)
Advanced Electronic Controls	624	(3)
Troubleshooting Electronic Controls	627	(1)
Summary	627	(2)
Review Questions	629	(2)
Glossary	631	(10)
Index	641