Stiebel Eltron Gmbh & Co. Kg

Michael Dion

Hubert Nolte

Frank Stiebel

A tankless water heater system (), with a heat exchanger device () comprising at least one hollow chamber () and at least one electrical heating element (), and a controller device () with a temperature control unit (), a tap event counter unit (), a down-time counter unit () and a time delay unit (); an electrical switching element () for connecting or is connecting one or several heating elements () to/from a power supply; an outlet temperature sensor () linked with the temperature control unit (); a flow rate sensor (); wherein: the tap counter unit () is connected to the flow rate sensor () and is triggered when water flow rate exceeds a tap indication threshold the down-time counter unit () is triggered and retriggered by the tap counter unit () and both provide a down-time event signal after any inactivity period with no water flow and records the duration of inactivity; the time delay unit () is connected to and triggered by the tap counter unit () starting a delay period which duration is switched from a short default delay period to a long delay period by the down-time signal provided by the down-time counter unit (); and the switching elements () are triggered by the time delay unit () only after the delay period has elapsed.

Tankless water heater system

A tank water heater assembly is provided including a tank water heater and a drain pan provided with a sensor holder for mounting a sensor. The sensor holder accommodates a leak detection sensor at predefined distance above an inner surface of a bottom wall of the drain pan. In this way the presence of harmless small amounts of water in the drain pan do not trigger an alarm. A transport assembly is presented for facilitating transportation of the tank water heater assembly to an installation site and subsequent installation. Finally, a method for installation of a tank water heater assembly is provided.

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West Hatfield, MA, United States of America

Michael Dion