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Summary:PROBLEM TO BE SOLVED: To enhance energy saving at an operation condition where a heating load is small, in an air conditioning system 1 having a heat medium circuit 10 to which an underground heat exchanger 11 and a boiler 12 are connected, and an air conditioner 50 enabling heating operation.SOLUTION: An air conditioning system is configured to perform operation in activation (operation in high load) of supplying heat medium heated by a boiler 12 to an air conditioner 50 configured to start heating operation; when a heat source switching condition is established during the operation in activation, stop the operation in activation; and perform operation in normal time of supplying only heat medium heated in an underground heat exchanger 11 to an air conditioner 50 as an object for the operation in activation.SELECTED DRAWING: Figure 5 【課題】地中熱交換器(11)とボイラー(12)とが接続された熱媒体回路(10)と、暖房運転が可能な空気調和装置(50)とを有する空気調和システム(1)において、暖房負荷が小さい運転条件での省エネルギ性を高める。【解決手段】暖房運転を開始する空気調和装置(50)へボイラー(12)で加熱された熱媒体を供給する起動時動作(高負荷時動作)を行い、起動時動作中に熱源切替条件が成立すると起動時動作を停止し、地中熱交換器(11)において加熱された熱媒体だけを起動時動作の対象であった空気調和装置(50)へ供給する通常時動作を行う。【選択図】図5
Bibliography:Application Number: JP20160102125