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HVACR318 – Refrigeration II

HVACR318 – Refrigeration II. Subcooling and Superheat. Subcooling and Superheating. The concepts of subcooling and superheating are the two most important principles that the service technician must understand before attempting to troubleshoot HVAC/R systems.

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HVACR318 – Refrigeration II

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  1. HVACR318 – Refrigeration II Subcooling and Superheat

  2. Subcooling and Superheating • The concepts of subcooling and superheating are the two most important principles that the service technician must understand before attempting to troubleshoot HVAC/R systems.

  3. Subcooling and Superheat Diagram

  4. Superheat • Superheat is any heat added to completely saturated vapor that results in a rise in temperature (sensible heat change) of the gas.

  5. Superheat Diagram 60°F 76 psig = 45 °F 15 °F superheat Evaporator Superheat

  6. Total or System Superheat Compressor Suction line Temperature 60°F • Pumps refrigerant vapor only! • Divides low and high side. Superheat 15°F 76 psig = 45°F

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