Basic principles of cooling, heat transfer, thermodynamics, components of a refrigeration system, vapour compression cycle, refrigerants and environmental considerations.

Usage of manifold gauges, vacuum pumps, leak detectors, brazing torches, recovery units; safety rules for refrigerant handling, PPE, electrical precautions and industry standards.

Types of compressors (reciprocating, scroll, semi-hermetic), working, lubrication, cooling methods, capacity control, troubleshooting and maintenance procedures.

Air-cooled and water-cooled condensers, cooling tower basics, coil cleaning, fan motors, descaling, pressure issues and performance optimization.

Types of evaporators, airflow patterns, defrost systems, heaters, fan coil units, humidity considerations and diagnosis of frost, airflow and cooling issues.

Copper pipe cutting, flaring, swaging, brazing, insulation, pipe routing, vibration control, oil traps, slope rules and best fabrication practices for commercial refrigeration.

Deep vacuum process, dehydration, charging methods, pressure testing, nitrogen purging, leak detection tools, recovery procedures and commissioning steps.

Contactors, relays, overloads, sensors, thermostats, pressure switches, safety controls, wiring diagrams, protection devices and electrical troubleshooting.

Programming digital controllers, setting parameters, defrost timings, sensor calibration, alarms, monitoring systems, VFD usage and energy-efficient configurations.

Cold-room panels, door heaters, strip curtains, blast freezers, display refrigeration, supermarket showcase units, air curtain issues and temperature management.

Ice machine operation, descaling and cleaning, commercial chillers, glycol systems, refrigeration racks, parallel compressors and industrial cooling applications.

Symptom analysis, pressure diagnostics, electrical faults, refrigeration balance issues, component failures, preventive maintenance schedules and service reporting.

Hands-on installation of a commercial refrigeration setup, brazing test, evacuation and charging demonstration, controller programming, troubleshooting exam and final certification.