The goal of this two-day Air Conditioning and Refrigeration (HVAC) course is to provide a broad introduction to air conditioning and refrigeration systems, including everyday operation & important refrigerant safety practices.

Prerequisites: –

Can access computer system and make use of internet to perform search over Google.

Need to Prepare?

Basic Knowledge of Mechanics and its associated system will be appreciated.

Tools Expected: –

Windows OS based PC, Smart phone with Internet, Notebook and Pen

Tools Provided (for the session): –

Reference Materials, PPTs, Study Elements and Software required.

Concepts: –

Circuits, Air Pressure and Flow, Temperature Balance, Controls and Trouble shooting Techniques

Summary: –

This workshop will be addressed about maintenance technicians, multi-craft trades people, building managers, HVAC technicians, or anyone seeking to improve their AC&R operation and maintenance skills.

Commitment: –

2 Days (7 hours each including 1-hour lunch break)

Agenda: –

Day 1

Session 1-  (03:30 hrs)

Basic Electricity

  • Basic electricity & Ohm’s Law
  • Meters & tools for taking electrical measurements
  • Electrical circuits: series & parallel


Control Circuits

  • Schematics
  • Ladder Diagrams
  • Developing Wiring Diagrams



  • Overloads
  • Relays
  • Contactors
  • Control Transformer
  • Starting Relay
  • Defrost Timer
  • Thermostat
  • High Pressure Control
  • Low Pressure Control
  • Oil Pressure Control


Session 2- (02:30 hrs)


  • General Troubleshooting Techniques
  • Common Problem Areas
  • Commercial Air Conditioning
  • Heat Pump Control
  • Pump Down Cycle


Session Recap

Day 2

Session 1- (03:30 hrs)

Determining and Improving Air Flow

  • 400 cfm per ton
  • How many square feet per ton?
  • Air mixture at the cooling coil


Exhaust Air

  • Positive pressure
  • Negative pressure


Make-Up Air

  • Positive pressure
  • Negative pressure
  • Conditioning the “make up” air


Session 2- (02:30 hrs)

Troubleshooting the Air Distribution System

  • Temperature difference across the coil
  • Balance in the system
  • Short cycling
  • Duct sizing
  • Noise
  • How to use a Ductulator


Session Recap

Zonal Round of SkillThon

  • Competition
  • Certificate distribution and acknowledgement