| 摘要 |
<p>PURPOSE:To prevent combustion on/off hunting from occurring during smoldering by counting the number socalled of 'solar high cut' operation when the flow rate of incoming water is not smaller than a minimum operation flow rate and forcedly stopping combustion when the number of 'solar high cut' has reached a specified number. CONSTITUTION:When the flow rate of incoming water is detected to be not smaller than a minimum operation flow rate, a counter 17 increases a count value by an increment of 1 every time when a 'solar high cut' processing signal or a 'solar high cut' return signal from a 'solar high cut' processing device is outputted, and when the count value becomes equal with a set value, an operation signal is outputted to a hunting stop processing device 18. When the hunting stop processing device 18 receives the operation signal, an electromagnetic open/close valve 13 is closed to stop combustion. Combustion stop state is kept maintained and an operator is instructed to check and service a hot water supply system. Thus, combustion on/off hunting during smoldering is prevented from being continued.</p> |
