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Electricity & Controls for HVAC/R
Introduction
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| Electricity & Controls for HVAC/R |
Electricity and Controls for HVAC/R is written with the assumption that the student has no prior knowledge of electricity or control systems. Basic electrical theory is presented in a practical, straightforward manner. Mathematical explanations are used only when necessary to explain certain concepts of electricity. Each unit starts with the objectives of the unit and ends with a summary of important facts. The text begins with the study of basic electrical theory and progresses to series circuits, parallel circuits, alternating current, inductive circuits, and capacitive circuits.
The text also includes information on different types of three phase services found in industrial and commercial locations as well as single-phase residential services. Individual devices and components common to the air conditioning, heating, and refrigeration field are presented in a practical manner. Devices are explained from a standpoint of how they operate and how they are used. The text contains testing procedures for many of the devices covered. The practical presentation of these devices makes this text a must-have reference book for the service technician working in the field.
Testing and Balancing HVAC Air and Water Systems
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Table of Content
SECTION 1 Basic Electricity
Unit 1 Atomic Structure 6
Unit 2 Electrical Quantities and Ohm’s Law 15
Unit 3 Measuring Instruments 24
Unit 4 Electrical Circuits 35
Unit 5 Electrical Services 50
Unit 6 Wire Size and Voltage Drop 63
Unit 7 Inductance 72
Unit 8 Capacitance
SECTION 2 Control Circuits
Unit 9 Schematics and Wiring Diagrams 90
Unit 10 Developing Wiring Diagrams
SECTION 3 Motors
Unit 11 Split-Phase Motors 118
Unit 12 The Shaded-Pole Induction Motor 131
Unit 13 Multispeed Motors 135
Unit 14 Three-Phase Motor Principles 148
Unit 15 The Squirrel-Cage Induction Motor 159
Unit 16 The Wound Rotor Induction Motor 179
Unit 17 The Synchronous Motor 186
Unit 18 Brushless DC Motors
SECTION 4 Transformers 199
Unit 19 Isolation Transformers 200
Unit 20 Autotransformers 221
Unit 21 Current Transformers 227
SECTION 5 Control Components 233
Unit 22 Overloads 234
Unit 23 Relays, Contactors, and Motor Starters 243
Unit 24 The Solid-State Relay 248
Unit 25 The Control Transformer 252
Unit 26 Starting Relays 260
Unit 27 Variable-Speed Motor Control 270
Unit 28 The Defrost Timer 274
Unit 29 The Thermostat 282
Unit 30 Pressure Switches 298
Unit 31 The Flow Switch 304
Unit 32 The Humidistat 308
Unit 33 Fan-Limit Switches 311
Unit 34 The Oil-Pressure Failure Switch 317
Unit 35 Solenoid Valves 321
Unit 36 The Short-Cycle Timer 327
Unit 37 Methods of Sensing Temperature 338
Unit 38 Gas Burner Controls 347
Unit 39 Oil Burner Controls 353
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SECTION 6 Troubleshooting Using Control Schematics 359
Unit 40 Introduction to Troubleshooting 360
Unit 41 Room Air Conditioners 376
Unit 42 A Commercial Air Conditioning Unit 383
Unit 43 Heat-Pump Controls 388
Unit 44 Packaged Units: Electric Air Conditioning and Gas Heating 400
SECTION 7 Ice Maker And Refrigeration Controls 413
Unit 45 Household Ice Makers 414
Unit 46 Commercial Ice Makers 436
Unit 47 Refrigeration Controls 452
SECTION 8 Solid-State Devices 463
Unit 48 Resistors and Color Codes 464
Unit 49 Semiconductor Materials 472
Unit 50 The PN Junction 478
Unit 51 Light-Emitting Diodes (LEDs) and Photodiodes 483
Unit 52 The Transistor 490
Unit 53 The Unijunction Transistor 496
Unit 54 The Silicon-Controlled Rectifier 501
Unit 55 The Diac 509
Unit 56 The Triac 512
Unit 57 The Operational Amplifier 518
SECTION 9 Solid-State Controls 531
Unit 58 Programmable Logic Controllers 532
Unit 59 Programming a PLC 546
Unit 60 Analog Sensing for Programmable Controllers 557
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Electricity & Controls for HVAC/R
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