Heating circuits return temperature reduction circuit for use in heating system, has heating circuits supplied with different temperature levels via common pump and mixer, and circuit integrated in housing

摘要

The circuit has a temperature-controlled shuttle valve inserted at a return line of a heating circuit with a higher temperature level. The shuttle valve opens if another heating circuit with lower temperature level does not have a heat requirement or a defined limit temperature is not yet reached. A check valve is provided for avoidance of a short-circuit between a main feed line and a main return line. The heating circuits are supplied with different temperature levels via a common pump and a mixer. The circuit is integrated in a housing. An independent claim is also included for a simplified variant for a circuit of reduction of return temperature in different temperature level heating circuits.