| 摘要 |
PURPOSE:To shorten the room heating rising time by burning in combustion amount more than the normal time combustion amount until room heating enabling hot water temperature is obtained at room heating starting time. CONSTITUTION:When a command of room heating operation is given, a circulation pump is driven, and a flow switch is thereby turned ON. When hot water temperature TH is 60 deg.C or higher, combustion is not executed, while when 60 deg.C or lower, an ignition is achieved. When ignited, a proportional combustion is stored on the basis of the deviation to the set temperature 85 deg.C. Since the combustion is executed from the maximum combustion output 19,5000kcal/hr or nearer up to 60 deg.C, the rising time can be shortened. When heated to 60 deg.C, the proportional combustion is executed on the basis of the deviation to the set temperature 85 deg.C with 7,500kcal/hr as the maximum combustion output. When the load is 5,000kcal/hr or less, it is heated to 85 deg.C, and the combustion is then stopped. When the hot water temperature falls to 65 deg.C by the operation of a radiator, the ignition is executed, and when ignited, the proportional combustion is performed by the output of the range of 7,500-5,000kcal/hr. |
