Electricity & Controls for HVAC-R

by Herman, Stephen L.; Sparkman, Bennie

• ISBN13: 9781401895136
• ISBN10: 1401895131
• Edition: 5th
• Format: Paperback
• Copyright: 2005-08-18
• Publisher: CENGAGE Delmar Learning

Summary

Now in its fifth 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.

Table of Contents

Preface	v
SECTION 1 BASIC ELECTRICITY	1	(76)
A Special Note on Safety	2	(4)
Atomic Structure	6	(5)
Electrical Quantities and Ohm's Law	11	(6)
Measuring Instruments	17	(10)
Electrical Circuits	27	(15)
Electrical Services	42	(12)
Wire Size and Voltage Drop	54	(8)
Inductance	62	(6)
Capacitance	68	(9)
SECTION 2 CONTROL CIRCUITS	77	(28)
Schematics and Wiring Diagrams	78	(17)
Developing Wiring Diagrams	95	(10)
SECTION 3 MOTORS	105	(74)
Split-Phase Motors	106	(10)
The Shaded-Pole Induction Motor	116	(4)
Multispeed Motors	120	(12)
Three-Phase Motor Principles	132	(11)
The Squirrel-Cage Induction Motor	143	(19)
The Wound Rotor Induction Motor	162	(7)
The Synchronous Motor	169	(6)
Brushless DC Motors	175	(4)
SECTION 4 TRANSFORMERS	179	(34)
Isolation Transformers	180	(21)
Autotransformers	201	(6)
Current Transformers	207	(6)
SECTION 5 CONTROL COMPONENTS	213	(116)
Overloads	214	(8)
Relays, Contactors, and Motor Starters	222	(5)
The Solid-State Relay	227	(3)
The Control Transformer	230	(7)
Starting Relays	237	(10)
Variable-Speed Motor Control	247	(4)
The Defrost Timer	251	(8)
The Thermostat	259	(15)
Pressure Switches	274	(5)
The Flow Switch	279	(3)
The Humidistat	282	(2)
Fan-Limit Switches	284	(5)
The Oil-Pressure Failure Switch	289	(4)
Solenoid Valves	293	(5)
The Short-Cycle Timer	298	(11)
Methods of Sensing Temperature	309	(8)
Gas Burner Controls	317	(6)
Oil Burner Controls	323	(6)
SECTION 6 TROUBLESHOOTING USING CONTROL SCHEMATICS	329	(50)
Introduction to Troubleshooting	330	(14)
Room Air Conditioners	344	(6)
A Commercial Air-Conditioning Unit	350	(5)
Heat-Pump Controls	355	(11)
Packaged Units: Electric Air Conditioning and Gas Heat	366	(13)
SECTION 7 ICE MAKER AND REFRIGERATION CONTROLS	379	(48)
Household Ice Makers	380	(21)
Commercial Ice Makers	401	(16)
Refrigeration Controls	417	(10)
SECTION 8 SOLID-STATE DEVICES	427	(60)
Resistors and Color Codes	428	(7)
Semiconductor Materials	435	(5)
The PN Junction	440	(5)
Light-Emitting Diodes (LEDs) and Photodiodes	445	(6)
The Transistor	451	(6)
The Unijunction Transistor	457	(4)
The Silicon-Controlled Rectifier	461	(7)
The Diac	468	(2)
The Triac	470	(5)
The Operational Amplifier	475	(12)
SECTION 9 SOLID-STATE CONTROLS	487	(30)
Programmable Logic Controllers	488	(14)
Programming a PC	502	(11)
Analog Sensing for Programmable Controllers	513	(4)
Glossary	517	(18)
Index	535