Description: Now in its sixth 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 and 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. Product Benefits: - Many photographs have been replaced and updated along with new line art.
- Text is updated to the latest technology and reflects the current National Electrical Code® requirements.
- Text design has been updated to provide ease in navigating chapter material.
- Unit on atomic structure has been rewritten to reflect the most accepted theories concerning the structure of atoms.
- The unit devoted to troubleshooting has been expanded to include an example of a step-by-step procedure for determining the problems with a central air conditioning system.
- COMPREHENSIVE COVERAGE: Comprehensive coverage of electric motors includes three-phase motors, squirrel cage induction motors, wound rotor motors, synchronous motors, and more.
- PRACTICAL EXPLANATIONS: Circuits commonly encountered in the field are explained in a practical, non-mathematical manner.
- UPDATED UNITS ON LATEST TECHNOLOGIES: New units on brushless DC motors, as well as light-emitting diodes (LEDs) and photodiodes introduce students to the latest technologies in the field.
- UPDATED UNITS ON INDUSTRY PRACTICES: Units on programmable logic controllers (PLCs) and programming PLCs are thoroughly updated to remain current with industry practices.
- REQUIREMENTS FOR 2008 NEC® STANDARDS: Requirements for unit installation have been updated to comply with 2008 NEC® standards.
Table of Contents: Part I: BASIC ELECTRICITY.
1. Atomic Structure.
2. Electrical Quantities and Ohm's Law.
3. Measuring Instruments.
4. Electrical Circuits.
5. Electrical Services.
6. Wire Size and Voltage Drop.
7. Inductance.
8. Capacitance.
Part II: CONTROL CIRCUITS.
9. Schematic and Wiring Diagrams.
10. Developing Wiring Programs.
Part III: MOTORS.
11. Split-Phase Motors.
12. The Shaded-Pole Induction Motor.
13. Multispeed Motors.
14. Three-Phase Motor Principles.
15. The Squirrel-Cage Induction Motor.
16. The Wound Rotor Induction Motor.
17. The Synchronous Motor.
18. Brushless DC Motors.
Part IV: TRANSFORMERS.
19. Isolation Transformers.
20. Autotransformers.
21. Current Transformers.
Part V: CONTROL COMPONENTS.
22. Overloads.
23. Relays, Contactors, and Motor Starters.
24. The Solid-State Relay.
25. The Control Transformer.
26. Starting Relays.
27. Variable-Speed Motor Control.
28. The Defrost Timer.
29. The Thermostat.
30. Pressure Switches.
31. The Flow Switch.
32. The Humidistat.
33. Fan-Limit Switches.
34. The Oil-Pressure Failure Switch.
35. Solenoid Valves.
36. The Short-Cycle Timer.
37. Methods of Sensing Temperature.
38. Gas Burner Controls.
39. Oil Burner Controls.
Part VI: TROUBLESHOOTING USING CONTROL SCHEMATICS.
40. Introduction to Troubleshooting.
41. Room Air Conditioners.
42. A Commercial Air-Conditioning Unit.
43. Heat-Pump Controls.
44. Packaged Units : Electric Air Conditioning and Gas Heat.
Part VII: ICE MAKER AND REFRIDGERATION CONTROLS.
45. Household Ice Makers.
46. Commercial Ice Makers.
47. Refrigeration Controls.
Part VIII: SOLID-STATE DEVICES.
48. Resistors and Color Codes.
49. Semiconductor Materials.
50. The PN Junction.
51. Light-Emitting Diodes (LEDs) and Photodiodes.
52. The transistor.
53. The Unijunction Transistor.
54. The Silicon-Controlled Rectifier.
55. The Diac.
56. The Triac.
57. The Operational Amplifier.
Part IX: SOLID-STATE CONTROLS.
58. Programmable Logic Controllers.
59. Programming a PC.
60. Analog Sensing for Programmable Controllers.
Glossary.
Index. |
