Trade Ready Technologies

High Quality ~ Affordable ~ Online Technical Training for Trades People

Electrical Theory ~ Electrical Troubleshooting ~ AC Refrigeration
Our Online Classes Are Always With A “Live Instructor”

Email Us: tradereadytech@gmail.com        Leave Messages ~ Request Call Backs: 864-406-6355

AC-Refrigeration Technology 101      Is This The Right Course For You?

• Is This Course For People Who Work As  …  Or Want To Work As:

• HVAC Laborers ……………………… NO!

• HVAC Mechanics ~ Installers ………. NO!

• HVAC Technicians ………………….. YES!

• HVAC Engineering …………………. YES!

• For a technician to truly understand the technical aspects of refrigeration, that technician needs to study and understand theory (we’re talking several areas of Physics). Becoming a competent technician takes years of technical study, and it is not an easy task to accomplish.

• Unlike many mechanical processes, what is actually happening in the refrigeration process is totally invisible to the naked eye.

  • You must rely on fairly expensive and somewhat delicate instruments to give you accurate measurements of whats going on in the system

  • You need to have a solid understanding of “Thermal Dynamics”, “Fluid Dynamics”, “Psychrometrics”, “Mechanical Physics”, and “Electrical Technology” to identify what is correct and what is wrong with a system.

  • So, if you like math, and enjoy the feeling of mastering some difficult areas of science, then this is the right course for you.

Course Outline ~ AC-Refrigeration Technology 101 _{(16HRS – 2 Days)}

Presented by: Tim Reardon

Rock-Solid Fundamentals:

• Fluid Dynamics for Tradespeople

  • Understand what is happening when a fluid is "Flowing" (refrigerant is a fluid)

• How the “Ideal Gas Laws” work in AC and Refrigeration

• In-depth Understanding of Pressure & Vacuum

  • Pressure:

    • Understanding what pressure means in many unique ways

      • Absolute Pressure vs Gauge Pressure vs other pressures

      • Imperial & Metric Pressure Measuring Systems

      • It’s All About Pressure Differential

    • Vacuum

      • What is a Vacuum

      • Imperial & Metric Vacuum Measuring Systems

      • Inches HG, mm HG

      • When We Measure Microns, What Are We Actually Measuring

Rock Solid – What Are Refrigerants

• Introduction to refrigerants

  • In-depth Understanding of our most important and abundant refrigerant

  • Pressure -Temperature Relationships

  • What is an Enthalpy Diagram

  • The Refrigerant Numbering System

  • Toxicity and Flammability Values of Several Common Refrigerants

Saturation – It’s Where the Job Gets Done

• Understand Enthalpy Diagrams

• Repeat Saturation - “It’s Where The Job Gets Done!”

Refrigeration Systems

• Early Methods of Refrigeration

• Types of Refrigeration Systems

  • One Way Phase Change ( The Old Ice Box)

  • Absorption Cycle

  • Compression Cycle

  • Peltier Block Technology

The Compression Refrigeration Cycle

• The Compression Refrigeration Cycle – By Far ~ The Most Common System

  • Compression Refrigeration Cycle Diagram

• Understand Energy

  • Sensible Heat Energy

  • Latent Heat Energy

  • Total Heat Energy

• Key Components in a Basic Compression Refrigeration System

  • Compressor, Discharge Tube, Condenser, Liquid Line, Metering Device, Evaporator, Suction Line

    • What is the status of the refrigerant in each of these components

    • What is happening to the refrigerant in each of these components

Rock Solid – What Is The P-T Chart

• Understanding the P-T Chart

  • Exercises Using Several Refrigerants

Rock Solid – Our Most Important Exercise

• Using The P-T Chart On Several Refrigeration Systems

• This Is The “Rubber Meets The Road” Exercise

  • On First Attempt, 97% of all HVAC Trades People Get This Wrong!!

Rock Solid – Understanding Enthalpy Diagrams

• Plotting systems on several Refrigerant Enthalpy Diagrams

  • If You Understand This – – – You Understand Refrigeration!!

• Identifying Saturation ~ Superheat ~ Subcooling ~ Change in Energy (Δ Energy)

• What are Azeotropic and Zeotropic refrigerants

• Understanding Refrigerant Bubble Point & Dew Point, and their Locations

Important Odds & Ends

• What does the “Correct Charge” look like

• Should We Be Using “Thermal Imaging”?

• Understanding “Working Compression Ratios”

Troubleshooting Exercises

• Troubleshooting AC refrigeration problems

  • Several exercises, using various refrigerants, to totally understanding gauge readings and refrigerant status at various locations in a refrigeration system

  • Several exercises knowing the refrigerant gauge readings and asking:

    • Based on the gauge readings, is there a problem?

    • What other information do we need to know to identify a problem?

    • If there is a problem, what might be causing the problem?

We will discuss the following refrigerants during our class:

R-22, R32, R-134a, R290, R404A, R-410a, R454b, R600, R718, R744

Note:

Different Classes Proceed at Different Rates. If Time Allows,

We May Look At One Or More Of The Following:

E E V’s – Electronic Expansion Valves

EPA 608 – New Rules – Practice Test Questions

A2L Refrigerants – Safety Considerations

Psychrometrics – Study Of Air & It’s Humidity

Building Load Calculations – Heat Loss & Heat Gain

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