| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an abnormality detection device for a hot water supplying apparatus capable of accurately carrying out proper judgement of a pipe by avoiding wrong judgement due to transient decrease of a tapping temperature and an erroneous judgement due to inflow of high temperature remaining hot water in detection of erroneous piping during construction. <P>SOLUTION: It is judged that there is a state of erroneous connection of an inflow water pipe 15 and a tapping pipe 16 when a temperature of the inflow water pipe 15 is higher than a temperature of the tapping pipe 16 in a reference temperature difference or more, after passage of a predetermined standby time from a heating start of a heat pump heating source. When the temperature of the inflow water pipe 15 at an operation start initial stage is higher than a reference inflow water temperature, the standby time is set longer than when it is low. When the temperature of the inflow water pipe 15 in the operation start initial stage is higher than the reference inflow water temperature, the reference temperature difference is set larger than when it is low. <P>COPYRIGHT: (C)2009,JPO&INPIT |
