PROBLEM TO BE SOLVED: To provide a hot-water supply system in which instruction set hot water supply temperature of a common heat source machine can be output from a plurality of remote controllers which eliminates labor of a user for changing the set hot water supply temperature to the temperature for cascading hot water before starting cascading hot water.SOLUTION: Normal operation is switched to hot water cascading operation in a bathroom heater 67 and switching information is transmitted to the heat source machine 5 when the user instruct starting hot water cascading (STEP 142, 143). The heat source machine 5 stores a present set condition about the hot water supply temperature or others in a memory then starts hot water supply control for the hot water cascading (STEP 152 to 154) when receiving the switching information from the bathroom heater 67. The hot water supply set temperature of the heat source machine 5 is changed to a fixed value (for example, 40°C) for the hot water cascading different from the value instructed from the remote controller before starting the hot water cascading in the hot water supply control for the hot water cascading. The set condition of the heat source machine 5 is returned to the one stored in the memory when the hot water cascading is finished.COPYRIGHT: (C)2012,JPO&INPIT【課題】共通の熱源機の設定給湯温度の指示を複数のリモコンから出せるようになっている給湯システムにおいて、打たせ湯開始前に設定給湯温度を打たせ湯用に変更する使用者の手間を省く。【解決手段】使用者が打たせ湯の開始を指示すると、浴室暖房機67は通常運転から打たせ湯運転へ切り替わるとともに、熱源機5へ切替わり情報が送信される(STEP142,143)。熱源機5は、浴室暖房機67から切替わり情報を受信すると、給湯設定温等についての現在の設定状態をメモリに記憶してから、打たせ湯用の給湯制御を開始する(STEP152~154)。該打たせ湯用の給湯制御では、熱源機5の給湯設定温は、打たせ湯開始前にリモコンから指示された値とは別の打たせ湯用の固定値(例:40°C)に変更される。打たせ湯の終了後は熱源機5の設定状態をメモリに記憶しておいたものへ戻す(STEP156)。【選択図】図3
