| 摘要 |
PURPOSE:To make it possible to effect a smooth shifting of fire during switching burners by obtaining the capability to supply hot water from the amount of supply hot water and the temperature of supply water and a set temperature and switching burners and selecting a burner suitable for the capability and carrying out the shifting of fire with a specified amount of alleviated ignition for the burner at the time of switching burners. CONSTITUTION:Calculation means 11 for hot water supply capability seeks a heating load Qg based on the amount QL of supply hot water, temperature Ti of supply water, set temperature Ts, and efficiency w (Qg = (Ts-Ti)XQc/w). A capability switching and control device 12 selects a group 3 of burners, taking the heating load Qg obtained as an input. A switching and ignition control device 13 opens a switching valve 6 by the output k of the capability switching and control device 12 and at the same time carries out alleviated ignition control which is given to a combustion amount regulator 5 a combustion amount setting signal Vs which sets the amount of gas for shifting fire smoothly for a burner 3A. Namely, everytime the output of switching of the capability switching device 12 requires to open the switching valve 6, the switching and ignition control device 13 is constituted to perform alleviated ignition control. |
