ELECTRIC CONTROL DEVICE FOR A CENTRAL HEATING BOILER

An electric control device for a central heating boiler which is provided with a water pump or an air ventilator, a burner with an electrically operated shut-off valve and an electric control circuit comprising a supply transformer and a series circuit connected to the secondary winding of said tran...

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Bibliographische Detailangaben
Hauptverfasser:	SLATS, HENRICUS J, OVERMAN, PAULUS T.J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES CONTROLLING DOMESTIC HOT-WATER SUPPLY SYSTEMS DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATINGSYSTEMS ELEMENTS OR COMPONENTS THEREFOR FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING PHYSICS RANGES REGULATING REGULATING OR CONTROLLING COMBUSTION SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	An electric control device for a central heating boiler which is provided with a water pump or an air ventilator, a burner with an electrically operated shut-off valve and an electric control circuit comprising a supply transformer and a series circuit connected to the secondary winding of said transformer and composed of the control winding of the shut-off valve, the contact of a room or regulator thermostat and, if present, the contact of a maximum thermostat and in which the water pump or air ventilator is connected in parallel with the primary winding of the supply transformer. The control device comprises a circuit to be connected to the contact of the room or regulator thermostat including a high resistance value series resistor to be connected into the mains supply circuit of the boiler, a relay with a normally open contact connected in parallel to said series resistor and means for controlling the relay in such manner that the water pump or air ventilator is put into operation only upon the closing of the contact of the room or regulator thermostat and the opening of the contact of the maximum thermostat respectively through the closing of the contact of the relay.