| 摘要 |
PURPOSE:To change heating capacity to control concentration of power loading on the basis of the value which is automatically calculated by detecting the seasonal change in the temperature of water supplied and the remaining rate in storage tank. CONSTITUTION:The temperature of water supplied to storage tank is detected by thermostat 5, and if the water temperature is over 20 deg.C in summer, thermostat 5 is turned off and relay contact 11 is left open with relay coil 9 not being excited so that no current is supplied to the second heater 4b which is connected with thermostat 7, and only the first heater 4a connected to thermostat 6 is supplied with current. When the hot water temperature rises to 85 deg.C, thermostat 6 operates to turn on or off the first heater 4a until power source 8 is turned off to keep the temperature of the hot water constant. When the temperature of the water is below 20 deg.C, thermostat is turned on to supply electricity to heater 46 so that thermostat 7 is turned on or off maintain the temperature of the hot water at 85 deg.C by using heaters 4a, 4b. |
