ONE-CAN TWO-CIRCUIT TYPE HEAT SOURCE DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the occurrence of local boiling during rise of second operation and to prevent the occurrence of choking with scale. SOLUTION: A one-can two-circuit type heat source device comprises first heat transfer pipes 27 and 28 extending through a can body 26 and situated downstream from a first combustion part 17; second heat transfer pipe 29 and 30 situated downstream from a second combustion part 20; a pair heat transfer pipe 31 situated in the vicinity of a boundary between the two combustion parts 17 and 20 with the first and second heat transfer pipes 28 and 30 brought into contact with each other; and a second combustion amount period limit means 38 to limit a maximum combustion amount of the second combustion part 20 during a set period. After single ignition of the second combustion part 20, the second combustion amount period limit means 38 limits a maximum combustion amount of the second combustion part 20 during a set period and regulates a combustion amount in a limited range such that temperature is adjusted to a demanded outgoing temperature of second hot water. An amount of heating applied on the second heat transfer pipe 29 and the pair heat transfer pipe 31 is suppressed by an amount equivalent to a value by which a combustion amount of the second combustion part 20 is in short and local boiling is prevented from occurring.