Content Standard: The learner demonstrates an understanding of the concepts in the preparation of RAC materials and tools using the different forms in RAC.
Performance Standard: The learner independently prepares appropriate RAC materials and tools using the different forms in RAC based on industry standards.
Objectives
- The learners are able to know the underlying principles of Refrigeration and Air-condition
- Learners can determine the right tools and possible alternatives in cases that may arise during installation and servicing
- The learners can know the underlying principles of Refrigeration and Aircondition electricity
- The learners can know the underlying principles in servicing and troubleshooting Refrigeration and Airconditioning
- The learners can simulate the servicing of Refrigeration and Airconditioning units
- The learners can simulate the servicing of Refrigeration and Airconditioning
Course Content
Fundamentals of Refrigeration and Air Conditioning
Day 1 – AM Session
Discuss Refrigeration concepts and principles
- Refrigeration Cycle
- States of Matter
- Units of Heat
- Methods of Heat Transfer
- Heat Flow
- Sensible Heat
- Latent Heat
- Superheat
- Subcooling
Day 1 PM Session:
Discuss Tools. Materials, and Equipment
- Copper Tube
- Tube cutter
- How to use flaring tools
- How to flare
- How to swage
- How to solder and braze (Oxy-acetylene) – Tube bender processes.
- Gauge manifold
- Vacuum Pump
- Recovery Machine
- Thermometer
- Refrigerants
- Lubricants (Oil)
- Weighing scale
Fundamentals of Electricity
Day 2 AM Session
Discuss the following concepts
- Electron Theory
- DC and AC Current
- Types of Circuit
- Electrical Units of Measurements
- Multi-tester
- Clamp Ammeter
Day 2 PM Session
Discuss the following concepts and principles
- Refrigeration Mechanical section
- Two pressure sides of the RAC system
- Types of compressors
- Types of expansion valves
- Types of evaporators
- Types of condensers
Discuss Electrical section
Principles of Servicing Refrigeration and Air Conditioning
Day 3 AM Session
Principles and concept of servicing Refrigeration and
Airconditioning system
- Logical approach in servicing the electrical section
- Interpreting diagrams and symbols
- Checking of components and devices
Day 3: PM Session
Principles and the concept of servicing Air Conditioning
- Window AC mechanical system
- Electrical system
- Electrical components
- Fan motor types
Servicing of refrigeration and Air Conditioning
Day 4 AM Session
Discussion and hands-on application
- Testing of components and parts
- Practice flaring and bending (tubing practice)
- Practice setting up of oxyacetylene equipment
- Practice soldering and brazing of copper tubes.
- Practice setting up Nitrogen equipment
- Conduct of leak testing
- Set up vacuum pump
- Set up recovery machine
- Set up gauge manifold to the system
Day 4 PM Session
Discussion and hands-on application
- Practice vacuuming of the RAC system
- Practice leak testing the WAC system
- Practice charging refrigerant
- Practice recovering of refrigerant
- Checking of parameters
- Unit monitoring and observation
Servicing of refrigeration and Air Conditioning- 2
Day 5 AM Session
Discussion and hands-on application
- Servicing the RAC electrical system
- Perform troubleshooting electrical system
- Perform brazing of the system by installing service ports
- Perform vacuuming
- Perform leak testing
- Perform charging of refrigerant
- Perform recovery of refrigerant
Perform checking of system parameters
Day 5 PM Session
Discussion and hands-on application
- Measure sensible heat and subcooling
- Occupational Health and Safety
- Safe handling of refrigerants
- 5s
Review of NC 2 expected competencies for assessment.
