| 摘要 |
PURPOSE:To improve handleability of a hot water boiler, by a method wherein a titled controller is constituted to perform primarily an indication for a normal operation state enabling to perform an indication for an abnormal operation by a combination of plural indication means to give a normal indication. CONSTITUTION:A temperature adjusting circuit is constituted with a temperature detecting device 12 detecting a temperature of a material to be heated and a temperature setting device 13 setting a target temperature for the material to be heated, and charging to a condenser 32 is started by an output signal of the temperature adjusting circuit, in a timer circuit consisting of a resistance 30 and the electrolytic condenser 32. Then, a combustion control is performed according to the charge voltage of the condenser 32 of the timer circuit and indication lamps 5 and 28 which are actuated by an output signal of a switching device 14 actuated by detecting the existence of the material to be heated and an output signal of the temperature adjusting circuit, in a sequence control circuit 36. The handleability is improved as neither a combustion lamp 5 nor boiling lamp 28 is lit at an occurrence of an unusual state. |
