Refrigeration & Air Conditioning Technician

Refrigerator and Refrigeration

Course Objectives

While studying the Refrigerator and Refrigeration, the student shall be able to:

  • Explains the basics of refrigeration and the types of refrigeration
  • Elaborates the major components of Refrigerator
  • Describes the types of refrigerants used in refrigerator
  • Elaborates about the maintenance and trouble shooting of refrigerator
  • Enumerates the step by step procedure of repairing and servicing of refrigerator and its parts

Course Outcomes

After completion of the Course Refrigerator and Refrigeration, the student will be able to:

  • Define the laws of Thermodynamics
  • Elaborate the various refrigeration cycles and the process of refrigeration
  • Identify and enumerate about the major parts of refrigerator namely compressor, evaporator, condenser etc.
  • List the characteristics of an ideal refrigerant
  • Demonstrate the procedure of care, maintenance, repair and servicing of various parts of refrigerator

Block-1: Basics of Refrigeration

Unit-1 – Fundamentals of Refrigeration


Introduction – Basic Terminology – Thermodynamics – Laws of Thermodynamics

Unit-2: Refrigeration Cycles


Process of Refrigeration – Methods of Producing Low Temperature – Air Cycle Refrigeration – Vapour Compression Cycle of Refrigeration – Vapour Absorption Cycle

Block-2: Major Components of Refrigerator

Unit -3: Components of Refrigeration System


Compressor – Condenser – Evaporator – Expansion Devices

Unit -4: Refrigerants


Introduction – Refrigerant Criteria – Designation of Refrigerants – Types of Refrigerants – Properties of Ideal Refrigerant

Block-3: Maintenance and Trouble-Shooting of Refrigerator

Unit -5: Care and Maintenance of Refrigerator


Basic Safety Precautions – External parts of a Refrigerator – Installation Process – Refrigerator with water and Ice Dispenser – Care of Refrigerator – Maintenance of Refrigerator – Maintenance of Freezer

Unit -6: Trouble-Shooting of Refrigerator


Technical Safety – Problems of Refrigerator – Troubleshooting the Refrigerator

Block-4: Testing and Servicing of Refrigerator

Unit -7: Basic Electrical Circuits of Automobile


Testing and Replacing of the Refrigerator Parts – Servicing of Refrigerator Parts

Unit -8: Refrigerant Charging and Leakage Tests


Charging of Refrigerant – Effects of Undercharging the Refrigerant Level in refrigeration equipment – Refrigerant Leak Test

Air-Conditioner and Air-Conditioning

Course Objectives

While studying Air-Conditioner and Air-Conditioning, the student shall be able to:

  • Describe the Principle of air-conditioning and the science behind air-conditioning
  • Classify the air-conditioning systems and study the various components of the system
  • Calculate the energy efficiency of the window and split air-conditioner
  • Acquire knowledge about the tools used for copper tubing and installation of AC
  • Demonstrate the duct work of AC, servicing and installation of units

Course Outcomes

After completion of the Course Air-Conditioner and Air-Conditioning, the student will be able to:

  • State the need and application of air-conditioning
  • Identify the major control systems of air-conditioner
  • Perform Copper tubing operations including brazing
  • Installation of widow and split ac, ducting work of central AC
  • Perform installation, servicing and maintenance of air-conditioner

Block-1: Science of Air-Conditioning

Unit-1 – Basics of Air-conditioning


Introduction – History of Air-Conditioning – Types of System – Need for Air-Conditioning – Application of Air Conditioning – Principles of Air Conditioning

Unit-2: Air-Conditioning Systems


Introduction to Air-conditioning system – Classification of Air-conditioning system – Types of Coolers – Major system components – Major system controls

Block-2: Working of AC and Copper Tubing

Unit -3: Working of AC and Energy Efficiency


Types of Air-Conditioning unit – Energy Efficiency – Energy Labelling Standard for Air- Conditioner – Working of Window Air Conditioner (WAC) – Working of Split Air Conditioner (SAC)

Unit -4: Tubes, Equipments and Copper Tubing Operations


Hand Tools – Equipments and Devices – Copper Tubing – Copper Tubing Operations

Block-3: Installations and Ducting

Unit -5: Installation of Window and Split Air-Conditioner


General Safety for Installation – Installation of Window AC – Installation of Split AC – Post Installation Check-up

Unit -6: Duct Work


Types of Duct Work – Components of Duct Work – Balancing the System – Duct Liner – Duct Cleaning

Block-4: Servicing and Maintenance of Air-Conditioner

Unit -7: Servicing of Air-Conditioner


Basic servicing operations of Air-conditioner – Avoiding Contaminants – Good service Practices – General Guidelines for Good Service Practices – Recovery, Recycling and Reclamation of Refrigerants – Cleaning of Water cooled Condensers

Unit -8: Safety and Maintenance of Air-Conditioner


Safety and its Importance – Safety while working on Air-conditioners – First Aid for injuries to Technicians – Quality Maintenance of Tools and Equipments – Preventive Maintenance of Room Air-conditioners – Maintenance of Cooling Coil

Special Cooling Systems

Course Objectives

While studying Special Cooling Systems, the student shall be able to:

  • Enumerate the types of special cooling system and the refrigerant used
  • Describe about deep freezers, bottle coolers and display cabinets
  • Explain about various refrigerated vehicles and cold storages used for food storage
  • Theorize about ice cream freezers, fish freezers and white ice plant

Course Outcomes

After completion of the Course Special Cooling Systems, the student will be able to:

  • List the various special cooling systems
  • Demonstrate the maintenance of deep freezers
  • Explain the working of white ice plant
  • Detail the application of cold storage and its maintenance

Block-1: Types Of Special Cooling System and Deep Freezers

Unit-1 – Cooling Systems


Introduction – Special Cooling Systems – Refrigerant

Unit-2: Deep Freezers


History of Freezing – Types of Freezers – Basic Feerzerology – Application of Deep Freezer – Maintenance of Freezers

Block-2: Beverage Coolers and Display Cabinets

Unit -3: Bottle Coolers and Chillers


Bottle Coolers and its Types – Components of a Bottle Cooler – Rapid Chillers – Using Rapid Drink Chillers – Blast Chillers – Benefits and Disadvantages of Blast Chillers

Unit -4: Refrigerated Display Cabinets


Display Counters – Multi-deck Refrigerators – Chiller Doors – Care and Maintenance of a Refrigerated Cabinet

Block-3: Cold Storage and Refrigerated Vehicles

Unit -5: Cold Room and Cold Storage


Cold room and its types – Cold storage plant – Working of Cold Storage Plant – Applications of Cold Storage

Unit -6: Transport Refrigeration


Transport Refrigeration Systems – Types of Refrigerated Transport – Refrigerated Containers/ Reefer – Bus Air-Conditioning

Block-4: Consumable Products Freezer

Unit -7: Ice Cream and Fisheries Freezer


Types of Ice Cream Freezers – Freezing Ice Cream – Batch Freezers – Continuous Ice Cream Freezers – Operating the Continuous Freezers – Fisheries Freezers

Unit -8: White Ice Plant


White Ice and its Types – Requirements of Ice Plant – Working Principle – Applications of White Ice