Senior High School Specialized Subject: Refrigeration and Air-Conditioning Servicing
Refrigeration and Air-Conditioning Servicing is one of the specialized subjects under the technical-vocational livelihood (TVL) career track. Some examples of the things that you will learn from taking this subject include:
- Service and Maintain Window- Type Air-conditioning
- Assembling and disassembling fan motor assembly in WAC
- Proper servicing and maintenance procedures in fan motor assembly
- Work Safety
- Electrical/electric controls
- Electrical symbols and schematic diagrams
- Proper servicing and maintenance procedures in electrical power and control circuits
- Diagnosing electrical controls
- Determining terminals of electrical controls
- Grounding
- Electrical Safety / Hazards
- Fundamentals of refrigeration cycle
- Tracing of refrigeration circuit
- Refrigerant system components and accessories
- Operating parameters of refrigerant system
- Diagnosing refrigerant circuit
- Reprocessing of refrigeration system
- Replacing defective components
- Repairing refrigerant leak
- Performing pressure leak test
- Performing dehydration/vacuum procedures
- Performing refrigerant charging
- Types of lubricant
- Types of refrigerants
- Types of refrigerant oil
- Safe handling of alternative refrigerants
- Safety in handling nitrogen
- Montreal Protocol
- Ozone depletion substances (ODS)
- Troubleshoot and Repair Domestic Refrigeration and Air-conditioning System
- Electrical plans, symbols, and abbreviations
- Interpreting diagram and details (schematic diagram)
- Parts of refrigerant circuit
- Manufacturer’s nameplate ratings
- Electrical /mechanical system analysis
- Troubleshooting chart, guide, and table
- Diagnostic procedures in troubleshooting
- Fundamentals of refrigeration and air conditioning
- Electrical system analysis
- Electrical parts, components, functions, and operations
- Testing electrical component procedures
- Troubleshooting electrical system procedures
- Repair /replace electrical system procedures
- Mechanical system analysis
- Mechanical parts, components, functions, and operation
- Mechanical troubleshooting and repair procedures
- Electrical/Mechanical operating procedures
- RAC Code of practice
- Recovery/recycling procedures
- Refrigerant cylinder calculation
- Maintenance of recovery/recycling equipment /instruments
- Alternatives refrigerant and lubricants, types, uses and selection
- Retrofitting process
- Safety precaution in retrofitting
- Proper housekeeping
- Accomplished Worksheet
- Measuring air circulation and velocity
- Velometer/ anemometer
- Temperature testing
- Thermometer
- Current and voltage measurement
- Clamp ammeter
- Unit Operating Procedures
- Pressure and Temperature Relationship
While studying, you will also be asked to demonstrate what you have learned by participating in class activities that may include the following:
- Replacing defective fan
- Diagnosing connections and wirings
- Replacing defective power supply and electrical control
- Replacing/repairing defective parts of the refrigerant circuit
- Preparing inspection report
- Familiarizing oneself with diagnostic procedures as stated in the service manual
- Analyzing wiring diagrams based on charts and manufacturer’s manuals
- Testing components following manufacturer’s manual, RAC Code of Practice, and/or enterprise troubleshooting policy
- Diagnosing components for faults in line with manufacturer’s manual, RAC Code of Practice, and/or enterprise troubleshooting policy
- Practicing safety precautions
- Performing recovery/recycling operation according to manufacturer specifications
- Performing retrofitting in accordance with manufacturer’s recommendation
- Testing unit in line with troubleshooting procedures
- Preparing report on repair and testing of unit conducted
These examples only cover the scope of the specialized subjects under the technical-vocational livelihood career track. For the scope of the core and contextualized subjects under the senior high school curriculum, please refer to their respective lists.
