Air Conditioning Training – Subcooling

by Ron Walker The Subcooling Process At saturation temperature, refrigerants can be a mix of both liquid and vapor. To ensure the proper operation of the metering device and indoor coil it is essential that enough heat is removed from the refrigerant so that it is 100% liquid. To do this the system is designed…

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Air Conditioning Training – Compressor and Condenser Coil

by Ron Walker The Compressor ¬†When the suction vapor is drawn from the suction line into the compressor, the cold refrigerant vapor absorbs heat from the compressor motor windings. If there is the proper amount of vapor present, the compressor will be cooled properly. If there is a lack of refrigerant vapor (such as an…

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Refrigeration and Air Conditioning Training – Superheating Suction Vapor

by Ron Walker Superheating Suction Vapor When all of the liquid refrigerant in the evaporator circuit has boiled off only vapor remains in the circuits. At this point the remaining vapor is still very cold. As the cold vapor continues to travel through the evaporative coil, it continues to pick up heat from the warm…

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Refrigeration and Air Conditioning Training – The Evaporator Circuit

by Ron Walker The Purpose of the Metering Device The metering device forces the liquid refrigerant to drop its pressure from high to low. This, in turn, drops the temperature. An air conditioning system is designed so that the metering device drops the pressure/temperature of the refrigerant to a saturation temperature below that of the…

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Air Conditioning Training – Electric Circuits 2

by Ron Walker Parallel Circuits The other type of circuit you will encounter as an HVAC Technician is the parallel circuit. These types of circuits are common to all of the equipment you will encounter. Most loads use line voltage as their power source. The parallel circuit allows the line voltage to be supplied to…

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