Procedure for checking the presence of a non-return valve in a heating system

摘要

The invention relates to a method for the regeneration of an ionization electrode (3) for a measurement of the ionization in a flame area (2) of a burner (1), the ionization electrode (3) when the burner (1) is started for a predeterminable time interval (Δt) is applied with a second AC voltage with a second frequency which is higher than a first frequency of a first AC voltage used for continuous operation. The invention also relates to a device, in particular for carrying out the above method, with an ionization electrode (3) which is arranged in a burner (1) so that it measures an ionization current in a flame area (2) when the burner (1) is in operation can, a first alternating current source (5) for a first alternating current with a first frequency, a second alternating current source (6) for a second alternating current with a second, higher frequency and a switching device (7), which during operation according to specifiable criteria, the second alternating current sources ( 6) turns on. Even in long-term operation, the present invention avoids malfunctions during cold starts of a burner due to measurement errors in the ionization current and, through accelerated heating during a cold start, enables regeneration of the ionization electrode and ensures trouble-free regulation.