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A/C & Refrigeration Systems

Course Overview

The goal of this Air Conditioning and Refrigeration Systems course is to provide a broad introduction to air conditioning and refrigeration systems. It is designed to train and prepare students for entry as service and maintenance technicians. Students are taught common practices for general operation and maintenance of their RAC systems. The course is a great overview for RAC technicians, or anyone seeking to improve their RAC operation and maintenance skills. The students would learn skills that support the installation, testing, and servicing of a refrigeration system. This would help them keep the systems up and running as efficiently as possible.

Course Features




90 hours

next period

September 2023




theory & practical

Grantley N. Parris


Fundamentals of Refrigeration

  • Basic Math & Measurement
  • Basic Tools
  • Temperature, Pressure & Heat Transfer
  • Introduction to Refrigeration Systems
  • Recovery
  • Leak Check And Evacuation
  • Charging
  • Coil Cleaning

Four Basic Components of a Refrigeration System

  • Evaporators
  • Compressors
  • Condensers
  • Metering Devices

Controls, Valves, Accessories and Heat Pump

  • Controls
  • Valves
  • Accessories
  • Heat Pumps


  • Enthalpy, Dirty Condensers, Subcooling
  • Diagnosing A/C Systems
  • Diagnosing Commercial Refrigeration Systems
  • Diagnosing Compressor Problems
  • Diagnosing HPR Valves
  • Diagnosing Reach-Ins
  • Diagnosing Noncondensables

Advanced Refrigeration

  • Retrofit Refrigerants & Charging Flooded Condensers
  • Compressors Capacity Control
  • Supermarket Refrigeration
  • Walk-In Refrigerators & Freezers
  • Ice Machines
  • Chillers
  • Pumpdown

Psychrometric Chart

  • Overview of Psychrometrics
  • The Psychrometric Chart

Refrigeration Ppework

  • Copper Tubing
  • Soft Drawn
  • Hard Drawn
  • Cutting Copper Tubing
  • Bending Copper Tubing
  • Flared Connections
  • Swaged Joint
  • Fittings

Oxy- acetylene Equipment

  • Cylinder Safety Precautions
  • Acetylene
  • Oxygen
  • Gas Pressure Regulators
  • Backfires and Flashbacks
  • Setting the Gas Pressures
  • Lighting the Torch
  • The Neutral Flame
  • The Carburizing Flame
  • The Oxidising Flame
  • Brazing Alloys

Brazing Techniques

  • Cutting and Fitting
  • Cleaning
  • Proper Fluxing
  • Purging System with Dry Nitrogen
  • Heating and Flowing the Alloy
  • Cleaning After Brazing
  • Pressure Testing