CONNECTED HOT WATER SUPPLY SYSTEM

PROBLEM TO BE SOLVED: To provide a connected hot water supply system which can continue hot water supply usage by the connected hot water supply system for a longer period of time without causing interruption of hot water supply usage, even when air supply/exhaust flow passages of water heaters for constituting the connected hot water supply system fall into a blocked tendency.SOLUTION: A connected hot water supply system includes two or more water heaters and a system controller communicatively connected to each water heater and for executing control of the number of units. Each water heater performs increase correction of target rotational frequency of a blower fan by a predetermined ratio according to the progress of a blocking degree of an air supply/exhaust flow passage, and when an accumulated correction amount is increased to a first determination value, a hot water supply operation is forcibly stopped. A fan control situation of a main water heater is monitored (S1), and when the correction amount has reached a second determination value lower than the first determination value (YES in S2), setting as a main water heater is cancelled and assignment as the main water heater thereafter is banned, and it is set as a sub water heater.SELECTED DRAWING: Figure 5 【課題】 連結給湯システムを構成する給湯器の給排気流路が閉塞傾向に陥ったとしても、給湯使用の中断を招くことなく、連結給湯システムによる給湯使用をより長期に亘り継続させ得る連結給湯システムを提供する。【解決手段】 ２台以上の給湯器と、各給湯器と通信接続されて台数制御を実行するシステムコントローラとを備える。各給湯器は給排気流路の閉塞度合の進行に応じて送風ファンの目標回転数を所定比率ずつ増大補正し、累積補正量が第１判定値まで増大すると給湯作動を強制停止させる。メイン給湯器のファン制御状況を監視し（Ｓ１）、補正量が第１判定値より低い第２判定値に到達すれば（Ｓ２でＹＥＳ）、メイン給湯器としての設定を解除して、以後のメイン給湯器としての割り付けを禁止する一方、サブ給湯器として設定する。【選択図】図５