ELECTRIC BOILER, CENTRAL HEATING SYSTEM COMPRISING AN ELECTRIC BOILER, TAP WATER HEATING SYSTEM COMPRISING AN ELECTRIC BOILER AND METHOD FOR OPERATING THE SAME

摘要

Electric boiler (110) comprises a main cold water inlet (118), first and second vessels (111) for heating water, a controller, and a main hot water outlet (117). Each vessel (111) comprises a respective inlet (112) for receiving cold water from the main cold water inlet (118), a respective electric heating element (114) for heating the cold water, a respective outlet (116) for supplying hot water to the main hot water outlet (117) and a respective shut off (1 13) valve for controlling the flow through the first outlet. The electric boiler (1 10) is configured for receiving single phase electric power having a maximum power rating of 5000 W or less and to supply the electric power to the heating elements (114) of the vessels one at a time in order to heat the first vessel (111) and the second vessel sequentially.