| 摘要 |
<p>PURPOSE:To prevent the reduction of hot-water temperature when room heating load is increased, by a method wherein a temperature setting level for strong, weak combustion or the stop of the combustion is changed by a condition whether combustion is shifted to the strong combustion or not from a condition under combustion, non-combustion or starting the combustion. CONSTITUTION:A temperature setting for the strong combustion, weak combustion and stooping of a burner changes the output condition of the output ports O0, 01 of a micro-computer 1 into 0.1 and is taken out as a scan signal while scan signals, set in respective level is obtained as the potential of a point A by the combination of respective resistances of a temperature setting circuit C. The scan signal, whose level is set, and a hot-water temperature signal B are inputted into a comparator 28 and the output of the comparator 28 is inputted into the input port I0 of the micro-computer 1 while input decisions are effected in synchronism with respective scan signals, whereby the operation of strong combustion, weak combustion or stopping of the combustion is determined.</p> |
