Abstract: When a detection temperature by a hot-water tank thermister (42) has been equal to or lower than a re-heating determination temperature over at least a re-heating determination time, a tank controller (50) performs a sterilization process by heating hot water within a hot-water tank (31) by means of a heat pump unit (60); and when the detection temperature by the hot-water tank thermister (42) has been equal to or lower than a determination temperature for prohibiting the use of stored hot water over at least a determination time for prohibiting the use of stored hot water, the tank controller (50) performs only a temperature regulation control via heating while keeping a hot-water flow regulation valve (34) in a closed state.

Abstract: When a detection temperature by a hot-water tank thermister (42) has been equal to or lower than a re-heating determination temperature over at least a re-heating determination time, a tank controller (50) performs a sterilization process by heating hot water within a hot-water tank (30) by means of a heat pump unit (60); and when the detection temperature by the hot-water tank thermister (42) has been equal to or lower than a determination temperature for prohibiting the use of hot water in the hot-water tank over at least a determination time for prohibiting the use of hot water in the hot-water tank, the tank controller (50) performs only a temperature regulation control via heating while keeping a hot-water flow regulation valve (34) in a closed state.

Abstract: When a detection temperature by a hot-water tank thermister (42) has been equal to or lower than a re-heating determination temperature over at least a re-heating determination time, a tank controller (50) performs a sterilization process by heating hot water within a hot-water tank (31) by means of a heat pump unit (60); and when the detection temperature by the hot-water tank thermister (42) has been equal to or lower than a determination temperature for prohibiting the use of stored hot water over at least a determination time for prohibiting the use of stored hot water, the tank controller (50) performs only a temperature regulation control via heating while keeping a hot-water flow regulation valve (34) in a closed state.

Abstract: When a detection temperature by a hot-water tank thermister (42) has been equal to or lower than a re-heating determination temperature over at least a re-heating determination time, a tank controller (50) performs a sterilization process by heating hot water within a hot-water tank (30) by means of a heat pump unit (60); and when the detection temperature by the hot-water tank thermister (42) has been equal to or lower than a determination temperature for prohibiting the use of hot water in the hot-water tank over at least a determination time for prohibiting the use of hot water in the hot-water tank, the tank controller (50) performs only a temperature regulation control via heating while keeping a hot-water flow regulation valve (34) in a closed state.

Abstract: A hot water supply system which allows two hot water supply apparatuses to operate cooperatively and which can avoid degrading a hot water supply capability when one of the two hot water supply apparatuses cannot perform as a master or slave. The two hot water supply apparatuses each have a connection communication terminal, a master controller, an external communication terminal, and a slave controller. The hot water supply system includes a communication cable via which the connection communication terminal of one of the two hot water supply apparatuses is connected to the external communication terminal of the other hot water supply apparatus, and a failure reporting device for reporting a failure in the master controller provided in the hot water supply apparatus operating as the master and a failure in the slave controller provided in the hot water supply apparatus operating as the slave.

Abstract: It is an object of the invention to provide a radio remote controller system that, when power saving for a radio remote controller is realized by intermittently setting a data receivable period in the radio remote controller, can easily and flexibly change a length of a period for making it impossible to receive the radio data and reduce power consumption of the radio remote controller. A master set connected to a water heater main body by wire transmits monitor data G(G1, G2, G3) indicating an operation state of the water heater main body, which include transmission time information indicating the next time (t14 at G1, and t17 at G2) of transmission of the monitor data G, to a slave set serving as a radio remote controller.

Abstract: A hot water supply system which allows two hot water supply apparatuses to operate cooperatively and which can avoid degrading a hot water supply capability when one of the two hot water supply apparatuses cannot perform as a master or slave. The two hot water supply apparatuses each have a connection communication terminal, a master controller, an external communication terminal, and a slave controller. The hot water supply system includes a communication cable via which the connection communication terminal of one of the two hot water supply apparatuses is connected to the external communication terminal of the other hot water supply apparatus, and a failure reporting device for reporting a failure in the master controller provided in the hot water supply apparatus operating as the master and a failure in the slave controller provided in the hot water supply apparatus operating as the slave.

Abstract: A radio communication system for registering an ID code of a communication partner in a transceiver easily and surely. In a first step, a slave set transmits “pairing application data” including a slave set ID to a master set. In a second step, the master set transmits “pairing reception data” including a master set ID and the slave set ID to the slave set. In a third step, the slave set transmits “first pairing selection data” including the slave set ID and the master set ID to the master set. In a fourth step, the master set transmits “second pairing selection data” including the master set ID and the slave set ID to the slave set. After the master set and the slave set recognize that processing for selecting communication partners is performed between the master set and the slave set according to the first to the fourth steps, in a fifth step, the slave set registers the master set ID of the master set and transmits “pairing completion data” to the master set.

Abstract: It is an object of the invention to provide a radio remote controller system that, when power saving for a radio remote controller is realized by intermittently setting a data receivable period in the radio remote controller, can easily and flexibly change a length of a period for making it impossible to receive the radio data and reduce power consumption of the radio remote controller. A master set connected to a water heater main body by wire transmits monitor data G(G1, G2, G3) indicating an operation state of the water heater main body, which include transmission time information indicating the next time (t14 at G1, and t17 at G2) of transmission of the monitor data G, to a slave set serving as a radio remote controller.

Abstract: A burner apparatus comprising: a burner plate, a proportional directional valve through which fuel gas flows into said burner plate, a blower which supplies air to said burner plate, a thermal sensor which detects the burning condition of said burner plate, a heat determining means which determines the heat generation of said burner plate, a blower control circuit which controls said blower in response to the condition of said heat determining means, a proportional directional valve control circuit which controls the opening degree of said proportional directional valve in response to the output of said thermal sensor and the amount of air flow from said blower.

Abstract: A burner apparatus comprising: a burner plate on which fuel gas is ignited, a thermal sensor which generates an output voltage in response to the combustion of the fuel gas so as to detect an air component of the fuel gas, means for causing the output from the thermal sensor to correspond to the quantity of combustion on said burner plate, and a safety circuit which stops combustion on said burner plate when the output of the thermal sensor displaces from a magnitude within a certain range.