1. © 2004 Refrigeration Training Services - Refrigeration Categories v1.1
E1 – Electrical Fundamentals Subject 1 – Atoms and Electrons, Ohms Law, Resistance
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“Atoms and Electrons, Ohms Law, Resistance”
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Atoms and molecules (2-8)
Conductors (9-12)
Ohm's Law (13 -17)
Ohm's Law Examples (18-20)
Ohm's Law Disc (21-24)
Calculating Electrical Power Examples (25-28)
Ohm's Law Wheel (29-30)
Resistance & Loads with Bridge Crossing (31-39)
© 2005 Refrigeration Training Services - Electrical Categories v1.0
© 2004 Refrigeration Training Services
No reproduction or unauthorized use allowed

2. E1 – Electrical Fundamentals Subject 2 – AC and DC Current
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Direct Current (2-3)
Alternating Current (4-7)
Generating Alternating Current (8-9)
Expressing AC with a Sine Wave (10-13)
Generating 3Ø Alternating Current (14-17)
Inductance & Reactance (18-21)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

3. © 2005 Refrigeration Training Services - Electrical Categories v1.0
E1 – Electrical Fundamentals Subject 3 – Meters, Circuits, Loads & Switches
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“Meters, Circuits, Loads & Switches”
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Meter Types Intro (2)
Voltmeters (3-4)
Ohmmeters (5-10)
Ammeters (Amp Meters) (11-14)
Determining Circuit Resistance (15-16)
Series Circuits (17-28)
Parallel Circuits (29-44)
Simple Diagram of Parallel Circuits (45-46)
Diagram Development (47-52)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

4. E1 – Electrical Fundamentals Subject 4 – Symbols and Wiring Diagrams
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Electrical Loads (2-7)
Contactors (8-12)
Relays (13-16)
Introduction to switches (17-21)
Thermostats (22-24)
Pressure Controls (25-28)
Fuses and Overloads (29-30)
Introduction to Wiring Diagrams (31-34)
Schematic Diagrams (35-40)
HVACR Industry Standards for Electrical Diagrams (41-44)
Reading wiring diagrams (45-57)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

5. E2 – Motors and Motor Starting Subject 1 – Fan Motors
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Basic Electric Motors (2-5)
Motor Starting (6-8)
Shaded-Pole Motors (9-13)
Changing Motor Rotation (14-18)
Multi-speed Shaded-Pole Motors (19-20)
Split Phase Motors (21-25)
Fan Motor with Centrifugal Switch (26-29)
Permanent Split Capacitor Motors (30-34)
Motor Speeds (35-39)
Multi-Speed Split Phase Motors (40-46)
Three Phase Motors (47-51)
Describing Common Motors (52-62)
Motor Nameplates (63-66)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

6. © 2005 Refrigeration Training Services - Electrical Categories v1.0
E2 – Motors and Motor Starting Subject 2 – Compressor Relays and Capacitors
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Single Phase Compressor Starting (2-5)
Start Relays (6-10)
Current Relays (11-14)
Split Phase Motor with Current Relay (15)
How a Current Relay Works (16-19)
Adding a Start Capacitor (20-23)
Terminal box on a small compressor (24-27)
Two-wire Overload (28-29)
Potential Relays (30-35)
Potential Relay Capacitor Start Induction Run (CSIR) Motor (36-37)
Potential Relay Capacitor Start-Capacitor Run (CSCR) Motor (38-40)
Run Capacitors on PSC Compressors (41-43)
PTC Relays (44-49)
“Hard Start” Kits (50-55)
Solid State Potential Relays (56-59)
Solid State Current Relay Kits (60-66)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

7. © 2005 Refrigeration Training Services - Electrical Categories v1.0
E2 – Motors and Motor Starting Subject 3 – Contactors and Motor Starters
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Symbols for Contactors (3-6)
Contactor Operation (7-10)
Contactor Troubleshooting (11-16)
Motor Starters (17-19)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

8. E2 – Motors and Motor Starting Subject 4 – Troubleshooting Motors
© 2004 Refrigeration Training Services - Refrigeration Categories v1.1
E2 – Motors and Motor Starting Subject 4 – Troubleshooting Motors
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1Ø Motor Checks (4-6)
3Ø Motor Checks (7-12)
Open Windings (13-14)
Shorted Windings (15-16)
Windings Shorted to Ground (17-18)
Checking Fuses with Power On (19-20)
Motor Tries to Start (21)
Motor Runs with High Amps (22)
Checking a Run Capacitor (23-24)
Run Capacitors in Parallel & Series (25-27)
Checking a Start Capacitor (28-30)
Potential Relay Troubleshooting (31)
Current Relay Troubleshooting (32)
PTC Relay Troubleshooting (33)
Using Jumper Wires (34-35)
Fan Blades (36-42)
What can a Fan Blade Tell You? (43)
© 2005 Refrigeration Training Services - Electrical Categories v1.0
© 2004 Refrigeration Training Services
No reproduction or unauthorized use allowed

9. E3 – Controls and Devices Subject 1 – Thermostats and Heating Controls
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Line Voltage Thermostats (2-6)
High Voltage / Low Voltage Circuits (7-8)
Honeywell Subbase (9-12)
Thermostat and Subbase (13-14)
Anticipators (15-18)
Basic Gas Heating Controls (19-21)
Gas Furnace Direct Ignition (22-25)
Electric Heating Controls (26-28)
Thermostat (T/S) Troubleshooting Chart (29)
Thermostat (T/S) Troubleshooting Chart (No animation) (30)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

10. © 2005 Refrigeration Training Services - Electrical Categories v1.0
E3 – Controls and Devices Subject 2 – Relays, Refrigeration Controls & Timers
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Understanding Relay Terminology (2)
Contacts (3-4)
Poles (5-6)
Throw (7-8)
Normal Position (9-10)
Relay Arrangements (11-15)
General Purpose Relay (16-20)
Commercial Refrigeration Controls (21)
Solenoid Valve Operation (22-25)
Common Time Clock (26-29)
Freezer Defrost (30-37)
Wiring Diagram for W/I Freezer (38-42)
Pressure Switches (43-47)
Oil Pressure Safety Control (48-51)
Crankcase Heaters (52-56)
Time Delays (57-60)
Heat Pump Defrost (61-62)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

11. © 2005 Refrigeration Training Services - Electrical Categories v1.0
E4 – HVACR Electrical Installation Subject 1 – Power Distribution, Delta & Wye Systems
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Electrical Distribution (2)
Power at the Pole (3-5)
Underground Service Transformer (6-8)
Residential Single Phase Power (9-10)
Electrical Panel - Good Workmanship (11-12)
Wye Wiring (13-14)
Delta Wiring (15-16)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

12. E4 – HVACR Electrical Installation Subject 2 – Wire Sizing and Materials
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AMPACITY (2-3)
Wire Sizing (4-5)
Wire Marking (6)
Some Examples of Wiring Materials (7-12)
Unit Data Plate Info (13-15)
Wire and Circuit Breaker Sizing for Motor Loads (16)
© 2005 Refrigeration Training Services - Electrical Categories v1.0

13. © 2005 Refrigeration Training Services - Electrical Categories v1.0
E4 – HVACR Electrical Installation Subject 3 – Circuit Breakers, Disconnects and Fuses
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HVAC Installation (2-3)
Single Phase Electric Panel (4-5)
Disconnects (6-10)
© 2005 Refrigeration Training Services - Electrical Categories v1.0