HOT WATER PREHEATING METHOD OF A BOILER USING A FREEZE PREVENTION ELECTRIC HEATER, CAPABLE OF PREHEATING HOT WATER USING AN ELECTRIC HEATER WHEN AN OUTDOOR TEMPERATURE IS LOWER THAN A PREDETERMINED TEMPERATURE

摘要

PURPOSE: A hot water preheating method of a boiler using a freeze prevention electric heater is provided to improve the function of a boiler and the speed of hot water tapping and to extend the service life of the boiler.;CONSTITUTION: A hot water preheating method of a boiler using a freeze prevention electric heater comprises the following steps: detecting an outdoor temperature if a hot water preheating switch is turned on; and operating a freeze prevention electric heater for heating water on the water passage of a hot water part for a predetermined time when the outdoor temperature is lower than a predetermined temperature.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Power; (BB,EE,FF,HH) Yes; (CC,DD,GG,II) No; (JJ) Turn off output of a freezing prevention heater; (KK,NN) Turn off preheating of hot water; (LL) Hot water supply operation; (MM) Turn off the output of the freezing prevention electric heater after a set time passed; (S1) Low level = OFF ?; (S2) Operate a supplementary water valve; (S3) Preheating of hot water is turned on?; (S4) Detect the outdoor temperature using an outdoor temperature sensor; (S5) Outdoor temperature is over a set hot-water preheating temperature?; (S6) Turn on output of a freezing prevention electric heater for a time corresponding to a predetermined temperature section according to the inputted outdoor temperature; (S7) Use of hot water is turned on?; (S9) Wait for heating and hot water supply