The TF 974 or TF 976 oil burner safety control boxes are  suitable for oil burners which may be equipped with a oil  preheater up to 30 kg/h capacity. The control boxes are  approved and certified according to EN 230.

A special contact in the control unit short-circuits the  thermo-switch of the fuel heater as soon as the burner is  operating and the flame signal is present. Therefore inter ruption of the burner operation due to decreasing oil  temperature can be prevented (e.g. in case of  high oil flow).

 If the control box goes into lock-out mode, the oil preheater power supply is also disconnected.



TYPES AVAILABLE

TF 974
1-stage operation post-ignition time ca. 20 sec. low voltage protection according to EN 230

TF 976
2-stage operation post-ignition time ca. 2 - 4 sec.  low voltage protection according to EN 230