| 摘要 |
PURPOSE:To limit an expenditure required for a control device under a simple control without requiring any complex control of a concurrent ignition between a hot water burner and an additional boiling burner at a hot water feeding device in which an amount of combustion is adjusted with a proportional valve which is common in an additional boiling operation and a hot water feeding operation. CONSTITUTION:A microcomputer 602 to be mounted on a control device 600 of a hot water feeder having an additional boiling function has a programming of a concurrent ignition prohibiting function 608 in which the first and second hot water feeding burners 203, 204 are ignited at first in the case that an instruction to start a hot water feeding and combustion and another instruction to start an additional boiling combustion are concurrently given and upon ignition at the burners, an additional boiling burner 205 is ignited. |
