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Quizás el mayor acierto de Dossat es su tratamiento enciclopédico de los componentes físicos:

Dossat revolucionó el diagnóstico al reemplazar la "adivinanza" por la medición precisa. Sus son patrimonio de la industria:

Dossat builds the entire subject around a few fundamental, interconnected laws of physics:

High-pressure, superheated vapor enters the condenser. It first cools to the saturation temperature, then gives up its latent heat of condensation as it changes phase into a high-pressure, high-temperature liquid. The liquid may be slightly subcooled before leaving the condenser.

Dossat teaches that abnormally high head (condensing) pressure almost always points to problems on the "high side" (dirty condenser, fan failure, non-condensables). Low suction pressure usually points to problems on the "low side" (low charge, restriction, evaporator airflow issues).