Refrigeration & Air Cond Complete Course with Free Log Book

Compare refrigeration and air conditioning by heat transfer and the vapor compression cycle, detailing key components—compressor, condenser, expansion valve, evaporator—and their distinct goals: keeping food fresh versus occupant comfort.

Explore the invention history of modern air conditioning and domestic electric refrigerators, from Willis Carrier's 1902 first modern air conditioner to Fred W. Wolfe's early refrigerator designs.

Explore welding and brazing techniques for small-scale refrigeration systems, including copper tube preparation, threading, and joining methods using oxygen and LPG, with a focus on safety and proper equipment.

Explore the compressor and its types—reciprocating (sealed, open, semi-sealed), rotary, centrifugal, screw, gear, and diaphragm—and how they convert low pressure vapor to high pressure gas to circulate refrigerant.

Learn how refrigerant control devices regulate liquid flow and pressure in refrigeration and air conditioning, including limiting devices, metering, capacity tubes, and thermostatic expansion valves with sensing bulb and bellows.

Learn the fundamentals of safety in HVAC workshops, including hazard awareness, required training, and the principle of good housekeeping: a place for everything and everything in its place.

Apply general safety standards for HVAC workshop and technicians by wearing helmet and goggles, dressing smartly, and safely handling refrigerants and pressurized gases at both sites.

Identify and verify the inverter refrigerator's fan motor by testing its 12–14 volt DC supply, wiring and PCB connections, using a multimeter and outside-the-unit checks.

Examine hvac special tools such as gauge manifolds, vacuum pumps, and flaring tools. Learn calibration, hydrostatic tests, and safe handling of refrigerants across r22, r134a, r410a, and r32.

Discover how hvac tools enable precise installation, upkeep, and repairs with safety and efficiency. Explore market leadership factors—R&D, a product portfolio, quality assurance, global presence, and training for energy-efficient solutions.

Define basic electricity and the flow of electrons, differentiate conductors, insulators, and semiconductors, and explain voltage, current (ampere), and the two current types: alternating and direct current.

Explore basic electrical test equipment for hvac, using a multimeter to measure voltage, current, and resistance. Learn voltmeter connections in parallel and current measurements in series.

Defines a circuit and explains series and parallel configurations, open circuits, and real-world uses in home and automotive wiring.

Learn about three capacitor types—fan, running, and starting—in hvac and refrigeration systems; running capacitors boost power factor and rpm, while starting capacitors deliver torque and disconnect with a centrifugal switch.

Explore essential HVAC and electrical symbols and read circuit diagrams, from resistors and capacitors to sensors and pumps, with printable PDF resources for reference.

Master essential hvac terminologies, including btu, ton, watts, air composition, humidity limits, gauge and atmospheric pressure, and refrigerant as the heat transfer medium for refrigeration and air conditioning.

Explore the heating and cooling modes of air conditioning, including the refrigeration cycle, four-way and reversing valves, and the roles of indoor and outdoor units.

Compare frost and no-frost refrigerators, explaining automatic defrost with heaters versus manual defrost, and review evaporator fins, compressors, thermostats, and power shortage effects on popularity.

Explore the body parts of a refrigerator, including the outer shell, insulation, door seal, and cabinet components, with a pictorial view of a single or double-door model. Understand how door seals, door shelves, and handles help maintain the internal temperature and organize food storage.

Identify the condenser, compressor, and evaporator in the refrigerator and explain how they remove latent heat from the refrigerant and regulate its pressure.

Explore the compressor’s role as the heart of a refrigerator or air conditioner, pumping refrigerant via suction and discharge lines, with motor, relay, overload, and installation location notes.

This lecture presents a table of oil amounts for refrigerator compressors across several horsepower sizes, with milliliter quantities. It stresses consulting manufacturer specs and industry experience to guide oil amounts.

Learn capillary tube diameter and length for refrigeration systems, with a table matching compressor size to tube diameter and length, and guidance on changing capacity and filters.

Measure internal dimensions for each compartment, convert inches to feet, and multiply length, width, and height to obtain cubic-foot capacity. Sum the volumes to get the total size.

Measure deep freezer size using internal dimensions in centimeters to calculate total and net volume in liters, excluding shelf volume, and understand how shelves and compressor compartments influence capacity.