SPACE AND WATER HEATING APPARATUS

원문 (중국어)

To detect an abnormality without a limit switch, a space and water heating apparatus includes external and internal circulation channels, including a shared portion, to respectively circulate a heating medium through space heating equipment () and a water-heating heat exchanger (), a first temperature sensor () that detects a temperature of the heating medium heated in the shared portion, and a second temperature sensor () that detects a temperature of hot water produced with the heat exchanger. A switch controller () controls a circulation switcher () to switch between the circulation channels. A storage () prestores, in association with a mode of the circulation switcher, a detection value from the second temperature sensor expected when the circulation switcher operates normally. An abnormality detector () detects an abnormality in the circulation switcher in response to the actual detection value being different from the expected detection value associated with the instructed mode.