Method for operating a closed hot-water installation and...

F - Mech Eng,Light,Heat,Weapons – 24 – D

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F24D 19/08 (2006.01) F24D 3/10 (2006.01)

Patent

CA 2345610

Method for operating a closed hot water installation provided with a pipe system (2), a boiler (1), heat exchangers (4), an expansion tank (6), a water make-up provision and a de-aerator (5), disposed at the highest point of the installation and comprising a non-return valve which is mounted in an air head and opens at a predetermined pressure to allow air to escape from the closed installation, the water level in the de-aerator (5) being detected for feeding water to the closed installation via the water make-up provision when the level becomes too low, the opening of the non-return valve being blocked until it is detected that the water level has fallen to a first level and the feed of water is started when a second, lower level is reached. Apparatus for using such method, wherein the detection of the water level is float-controlled.

L'invention concerne un procédé d'actionnement d'une installation d'eau chaude fermée comprenant un système (2) de tuyaux, un chauffe-eau (1), des échangeurs (4) de chaleur, un réservoir (6) d'expansion, une provision d'eau d'appoint et un dégazeur (5); ces éléments sont disposés au point le plus haut de l'installation qui comprend un clapet anti-retour monté dans un collecteur d'air et s'ouvre à une pression prédéterminée pour permettre à l'air de s'échapper de l'installation fermée; la détection du niveau d'eau dans le dégazeur permet d'introduire de l'eau dans l'installation fermée par le dispositif d'alimentation en eau d'appoint lorsque le niveau de l'eau devient trop bas. L'ouverture du clapet anti-retour est bloquée jusqu'à ce que l'on détecte que le niveau de l'eau est tombé à un premier niveau et l'alimentation en eau commence lorsqu'un deuxième niveau, inférieur, est atteint. L'invention concerne également un appareil de mise en oeuvre de ce procédé, la détection du niveau de l'eau étant commandée par un flotteur.

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