Procedure for the operation of a pasteurization facility, in which the pasteurization facility comprises a primary circuit for a medium to be pasteurized and a secondary circuit, in which the secondary circuit serves as a heating circuit to heat the medium to be pasteurized in the primary circuit, the process comprises the steps: - operation of the primary circuit and the secondary circuit, in which the medium to be pasteurized flows in the primary circuit and in which in the secondary circle a heating medium flows, - expulsion of the medium to Pasteurizing the primary circuit by means of a liquid that is introduced into the primary circuit, characterized by - stopping the flow of the liquid in the primary circuit after the primary circuit is filled with liquid, and - maintaining the flow of the heating medium in the circuit secondary after stopping the flow of liquid (water or medium to be pasteurized) in the circuit to primary, until and after a resumption of the flow of liquid in the primary circuit, determining a temperature of a first heat exchanger (5), allowing the first heat exchanger (5) (5) a thermal contact between the primary circuit and the secondary circuit and increasing the temperature of the first heat exchanger (5) as a function of the stop time of the primary circuit, or of the temperature in the hot retention section (6).Procedimiento para el funcionamiento de una instalación de pasteurización, en el que la instalación de pasteurización comprende un circuito primario para un medio a pasteurizar y un circuito secundario, en el que el circuito secundario sirve como circuito de calefacción para calentar el medio a pasteurizar en el circuito primario, el procedimiento comprende las etapas: - funcionamiento del circuito primario y del circuito secundario, en el que en el circuito primario fluye el medio a pasteurizar y en el que en el círculo secundario fluye un medio de calefacción, - expulsión del medio a pasteurizar del circuito primario mediante u
