Commercial Refrigeration Systems Maintainance

Refrigeration And Air Conditioning · Level 5  ·  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 gain hands-on skills in safely selecting and installing electrical components, assembling refrigeration units, and adhering to industry standards and safety regulations. By the end, you’ll be ready to carry out precise, safe, and efficient maintenance and installation of refrigeration systems, making you a valuable asset in the trade.

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Careers after Commercial Refrigeration Systems Maintainance

Mastering Commercial Refrigeration Systems Maintenance opens doors to vital roles across Kenya’s diverse economy. Refrigeration is essential in preserving food, medicines, and other perishables, making your skills highly sought after in many sectors. Whether you aim to work for established companies or start your own business, this expertise positions you for a rewarding and stable career.

  • In the hospitality industry, from Nairobi’s luxury hotels to Mombasa’s beach resorts, your skills ensure that refrigeration units keep food fresh and safe, directly impacting customer satisfaction and health standards.
  • In agribusiness hubs like KTDA factories or local dairy cooperatives, maintaining refrigeration systems preserves tea leaves, milk, and other produce, supporting Kenya’s vital export and food security sectors.
  • The bustling Jua Kali sector offers numerous opportunities for self-employment, where skilled technicians are needed to service refrigeration units in small shops, markets, and roadside eateries.
  • County governments and public health facilities rely on refrigeration to store vaccines and medicines; your ability to maintain these systems can make a real difference in community health outcomes.
  • Large companies such as KenGen and cold storage warehouses depend on reliable refrigeration for their operations, offering stable employment with professional growth potential.
  • The matatu industry also benefits from refrigeration units in long-distance vehicles, preserving food and drinks for passengers, creating niche opportunities for mobile refrigeration maintenance.

By mastering these skills, you not only become a valuable asset to employers but also empower yourself to launch your own service business, contributing to Kenya’s economy and improving lives through reliable refrigeration. Your expertise will keep Kenya’s food and health sectors running smoothly—your future starts here!

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 principles
  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 report

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 test
  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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Other units in Module IV