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.
- 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.
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.
21. Current Transformers.
Part V: CONTROL COMPONENTS.
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.