PURPOSE: To prevent useless consumption of power in a display element during a time when an operation is not conducted by a system wherein a time counting element counts a time set beforehand, when an operating element of a remote control device is operated, and a power source control element stops supply of a power to the display element when the time count is completed.
CONSTITUTION: The main body 1 of a hot water feeder is equipped with a main body transmission-reception element 3 interchanging monitor information and setting information with a remote control device 2A, and with a state setting element 4 for setting a state of operation on the basis of the setting information from the remote control device 2A. The remote control device 2A is equipped with a time counting element 9, and this time counting element 9 counts a time set beforehand, when an operating element 5A is operated, and controls a power source control element 8A when the time count is completed, so that the power source control element 8A may not supply a power to a display element 7. In other words, the display element 7 of the remote control device 2A displays the state of operation of the main body 1 of the hot water feeder on the basis of the monitor information, and when the time count of the time counting element 9 is completed, the power source control element 8A stops supply of the power to the display element 7. By this system, the power of the remote control device 2A can be saved.
NAGAMOTO SHUNICHI
MURAMATSU TAKESHI
