| 摘要 |
PURPOSE:To make suitable the water level of a bathtub after it is filled with water by a method wherein a plurality of reference water pressures obtained using an initial sequence executed until the number of counts reaches a predetermined value are accumulated and the cumlulative value is divided by count number to obtain average reference water pressure, which water pressure is used as a reference water pressure when water is fed into a bathtub. CONSTITUTION:10 liters of water is repeatedly fed into a bathtub and when the water level has risen as high as a bathtub fitting 26, a signal of a water flow switch 25 is turned ON. Residual air in a reheating circuit 2 is purged by driving a circulation pump 24 and if an open/close valve 21 is closed, water pressure in the bathtub 1 can be precisely detected by a water pressure gage 23. When execution number N of an initial set sequence having been executed is 5 or less, operation of execution number N=N+1 is performed and water pressure A of the gage 23 is read out so that the water pressure A is added to cumulative water pressure B initially set until N reaches 5, which is devided by N to obtain average value of the pressure A, which is taken as reference water pressure P0 based on which water level of filled water does not deviate largely from a suitable level. |
