| 摘要 |
PURPOSE:To make a device counter-movable to a small-scale housing complex by equipping each of a plurality of respective pumps with a detection-element detecting the operational condition of the pump and an operation-control-portion, and connecting this operation-control-portion electrically with an external central control device. CONSTITUTION:If, at present, a pump 5 on the side of a feed-water unit 4 is in operation singly, its pump-operation-condition is sent as a signal to a central control device 9 via a detection-element 18, an operation control portion 8 and a signal line 10. The central control device 9, according to the operation condition of this pump, decides if a single operation is sufficient for the pump 5 or if a parallel operation is needed, and when it has decided that a single operation should be carried on, an operation command is sent to only the operation control portion on the side of the feed-water unit 4 through a signal line 11. Also, when it has decided that a parallel operation should be carried on, an operation command is also sent to an operation control portion 8 of a pump 5 on the side of a feed-water unit 4'. And as for the operation itself of each pump 5 which has received the operation command from the central control device 9, it is done by means of each one's operation control portion 8.
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