COMBUSTION CONTROL DEVICE FOR HOT WATER BOILER

摘要

The device has a reverse-current generating means for flowing the current until the value of electromotive force in thermo power generating element is lower than a certain level when the combustion in burner stops. The device comprises an elctromagnetic safety valve mounted on the passage of gas supplied to the burner; water-pressure response type valve for being opened by water heated by the burner and supplied to the heat exchanger; thermo power generating element near the burner, connected with the coil of the safety valve.