| 摘要 |
PROBLEM TO BE SOLVED: To improve a connection decision accuracy for a hot-water pipe in a hot-water air conditioner having a connection determination means for determining whether or not the hot-water pipe is normally connected.SOLUTION: This invention relates to a hot-water air conditioner for heating an indoor side with hot-water supplied from a heat source machine to a heat exchanger through a hot-water pipe. The air conditioner has connection determination means for determining an erroneous connection state if a water temperature Tw within a water feeding pipe passage is kept to be lower than a determination reference water temperature T4 continuously for a prescribed reference time S4 or longer, a return side hot-water pipe is connected to the water feeding side hot-water pipe connection part, a going-side hot-water pipe is connected to a water discharging side hot-water pipe connection part. The connection determination means sets the determination reference water temperature T4 low if an initial room temperature Ta is low and sets the determination reference water temperature T4 high if the initial room temperature Ta is high. |
