Commercial Refrigeration Systems Maintainance

Refrigeration And Air Conditioning · Level 6  ·  12 Chapters

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What Commercial Refrigeration Systems Maintainance covers

In this unit, you will be able to confidently read and interpret commercial refrigeration system diagrams, assess site conditions, and prepare detailed reports to ensure smooth installations. You will master the safe selection and installation of electrical wiring and refrigeration units, including hydrocarbon systems, following all relevant safety standards and manufacturer specifications. By the end, you will skillfully assemble, position, and test refrigeration systems, ready to contribute effectively and safely in real-world commercial refrigeration projects.

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Careers after Commercial Refrigeration Systems Maintainance

Where you'll use this in real life

Mastering commercial refrigeration systems maintenance opens doors to vibrant career paths across Kenya’s growing industries. Whether you dream of working in bustling urban centres or supporting rural agribusiness, these skills are essential for keeping Kenya’s cold chains running smoothly.

  • In the jua kali sector, skilled refrigeration technicians are in high demand to service and repair refrigerators and freezers used by small-scale food vendors and market traders, ensuring fresh produce stays preserved.
  • County governments employ refrigeration experts to maintain cold storage facilities for vaccines, food supplies, and public health services, providing stable employment with competitive pay.
  • Large companies like KenGen and KTDA rely on refrigeration maintenance for their cafeterias and processing units, offering roles in corporate environments with opportunities for growth.
  • The hospitality industry, including hotels and lodges in Nairobi, Mombasa, and tourist hotspots, needs technicians to maintain commercial refrigeration units critical for food safety and customer satisfaction.
  • The matatu industry also benefits indirectly, as refrigeration maintenance skills contribute to the upkeep of cooling units in transport vehicles carrying perishables.
  • Skilled technicians can start their own businesses servicing refrigeration units for supermarkets, butcheries, and cold storage warehouses, tapping into Kenya’s expanding retail and agribusiness sectors.
  • By mastering safety standards like OSHA and IEE regulations, you ensure your work is trusted and respected, opening doors to higher-paying jobs and contracts.

Your expertise will keep Kenya’s food supply chains efficient and safe, supporting health and economic growth. With dedication, you can build a rewarding career or business that makes a real difference every day. Keep learning and stay passionate—your future in refrigeration maintenance is bright!

Chapters

What Commercial Refrigeration Systems Maintainance covers: 94 main topics in 12 chapters

1. Perform troubleshooting on a refrigeration system

  1. 1.1 Introduction to refrigeration troubleshooting on a principles refrigeration system
  2. 1.2 Principle of operation of refrigeration systems
  3. 1.3 Refrigeration equipment
  4. 1.4 Refrigeration process
  5. 1.5 Temperature and pressure relationship
  6. 1.6 Refrigeration components
  7. 1.7 Tools, equipment and instruments of trouble shooting RAC System
  8. 1.8 Trouble shooting RAC systems
  9. 1.9 Housekeeping practices
  10. 1.10 RAC System trouble shooting

2. Carry out refrigerant recovery

  1. 2.1 Type of refrigerant
  2. 2.2 Terms and concepts of refrigerant recovery
  3. 2.3 Tools, equipment and materials
  4. 2.4 Decommissioning procedures for hydrocarbon RAC systems
  5. 2.5 Safe procedures for handling potentially hazardous system materials, including hydrocarbon refrigerants
  6. 2.6 Calculate the safe fill weight for the recovery cylinder (density difference between HFCs and HCs)
  7. 2.7 Preparation for recovery
  8. 2.8 Pressure testing of the cylinder
  9. 2.9 Connecting manifold gauge set
  10. 2.10 Performing refrigerant recovery

3. Service refrigeration compressors

  1. 3.1 Introduction to Compressors
  2. 3.2 Types of compressors
  3. 3.3 Parts of a compressor
  4. 3.4 Diagnosing compressor fault
  5. 3.5 Servicing compressor parts
  6. 3.6 Assembling compressor parts
  7. 3.7 Health and safety measures
  8. 3.8 Tools, equipment and instruments
  9. 3.9 Testing and commissioning compressor
  10. 3.10 Preparing compressor service report

4. Service refrigeration heat exchangers

  1. 4.1 Introduction to Compressors
  2. 4.2 Types of compressors
  3. 4.3 Parts of a compressor
  4. 4.4 Diagnosing compressor fault
  5. 4.5 Servicing compressor parts
  6. 4.6 Assembling compressor parts
  7. 4.7 Health and safety measures
  8. 4.8 Tools, equipment and instruments
  9. 4.9 Testing and commissioning compressor
  10. 4.10 Preparing compressor service report

5. Service expansion valves

  1. 5.1 Introduction to heat exchangers
  2. 5.2 Types of heat exchangers
  3. 5.3 Cold/ heat source
  4. 5.4 Regulation and control devices
  5. 5.5 Temperature controller
  6. 5.6 Servicing heat exchangers
  7. 5.7 Testing and commissioning heat exchangers
  8. 5.8 Housekeeping practices

6. Carry out refrigeration pipe joining

  1. 6.1 Introduction to Expansion valve
  2. 6.2 Parts of an expansion valve
  3. 6.3 Valve control
  4. 6.4 Isolating expansion valve from the system
  5. 6.5 Diagnosis of faults
  6. 6.6 Tools, equipment and instruments required in servicing expansion valves
  7. 6.7 Disassembling expansion valve
  8. 6.8 Servicing expansion valve parts
  9. 6.9 Replacing/ refurbishing worn parts
  10. 6.10 Reassembling expansion valve
  11. 6.11 Housekeeping practices
  12. 6.12 Expansion valve service report writing

7. Carry out pressure strength and leak test

  1. 7.1 Introduction to pipe joining Oral questioning Written tests Practical tests
  2. 7.2 Types of pipe joining

8. Carry out pressure tightness test

  1. 8.1 Concepts of pressure strength
  2. 8.2 Calculate strength test pressure
  3. 8.3 Tools, equipment and materials
  4. 8.4 Preparation for pressure strength
  5. 8.5 Pressure strength testing of brazed joints
  6. 8.6 Pressure strength testing of the system
  7. 8.7 Leak Detection methods
  8. 8.8 Electronic detection
  9. 8.9 Soap solution or fluorescent dyes
  10. 8.10 Ultrasonic leak detection
  11. 8.11 Halogen-selective detection
  12. 8.12 Standing Pressure Test

9. Carry out system evacuation

  1. 9.6 Concepts of system evacuation
  2. 9.7 Methods of system evacuation
  3. 9.8 Tools, equipment and materials
  4. 9.9 Observation of evacuation pressure
  5. 9.10 Preparation for system evacuation
  6. 9.11 System Evacuation

10. Charge refrigeration system

  1. 10.6 Replacing/ refurbishing worn parts
  2. 10.7 Charging a Refrigeration System
  3. 10.8 Weighing Refrigerant
  4. 10.9 Using Charging Devices
  5. 10.10 Using Charging Charts

11. Perform pipe insulation

  1. 11.6 Checking on the pressure
  2. 11.7 Leak checking
  3. 11.8 Checking electrical connections
  4. 11.9 Checking if the system is running

12. Carry out commissioning

  1. 12.6 introduction to pipe insulation
  2. 12.7 types of insulation
  3. 12.8 methods of insulation
  4. 12.9 procedure of pipe insulation
  5. 12.10 Health, safety and environmental requirements

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Beyond the syllabus

Other units in Module IV