HVAC Skills: Electricity For Refrigeration, Heating And A/C-1

This training brings must-know electrical concepts and HVAC service procedures to life! An excellent way to introduce essential electrical topics, from basic concepts of electricity through motors and controls, This first of a three part series focuses on the basics, including: safety attire and equipment; relationships between current, resistance, and electromotive force; use of the ammeter, voltmeter and ohmmeter; plus different types of wiring diagrams and how to read simple schematics.

This training is designed for anyone learning about electricity for refrigeration, heating and air conditioning. Part 1 of 3.

• Safety
  • Introduction
  • General circuit safety
  • Electric shock
  • Shock response guidelines
  • Personal safety
  • Equipment and tool safety
  • Circuit protection
  • The national electric code
  • Fuses and circuit breakers
  • Circuit lockout
  • Wet conditions
  • Summary
  • Summary
• Basic Electricity and Circuits
  • Introduction
  • Atomic theory
  • Conductors and insulators
  • Electrical quantities
  • Ohm's law
  • Series circuit rules
  • Parallel circuits
  • Summary
• Electric Meters, Basic Components and Symbols
  • Introduction
  • Basic principles of electrical measurement
  • Analog meters
  • Analog voltmeters
  • Analog Ohmeters
  • Putting it together
  • Digital meters
  • Basic circuit components
  • Electrical loads
  • Motors
  • Solenoids
  • Heaters
  • Relays and contactors
  • Switches
  • Summary
• Wiring Diagrams and Schematics
  • Introduction
  • The schematic diagram
  • Pictorial diagrams
  • Reading wiring diagrams
  • Dehumidifier wiring diagram
  • Window air conditioner schematic
  • Walk-in cooler schematic
  • Commercial freezer schematic
  • Gas furnace schematic
  • Packaged A/C unit schematic
  • Summary

• Explain the importance of respecting electric circuits.
• Describe electric shock and how one should react in the event that a shock has occurred.
• Explain how field technicians should dress in order to reduce the possibility of personal injury.
• Explain how power tools, circuits and individuals are protected by fuses, circuit breakers and ground wires.
• Explain the importance of locking out an electrical system while service is being performed.
• Describe two fundamental laws that directly apply to atomic theory.
• Explain the difference between a conductor and an insulator.
• Define some commonly used electrical terms.
• Use Ohm's Law to calculate values for circuit voltage, current, resistance and wattage.
• Explain the rules that apply to series and parallel circuits.
• Explain how magnetism is related to current flow in an electric circuit.
• Explain the operation and usage of analog and digital electric meters.
• Explain the difference between system loads and switches.
• Explain the operation of relays, contactors and other switching devices.
• Show how system components are drawn in electrical wiring diagrams.
• Explain the purpose of wiring diagrams.
• Explain the difference between a schematic and a pictorial diagram.
• Explain how to read a wiring diagram.
• Identify the electrical symbols for various system components.
• Describe the wiring diagrams of various HVAC systems.