Diagnostic system for a fuel-fired water heater
US5954265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1998 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Jul 2, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N5/24
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A fuel-fired water heater has a series of control and operating components which, with electrical power being supplied to the water heater circuitry via a power switch, are electrically actuatable in a predetermined sequence to supply combustion heat to water contained in a tank portion of the water heater to return the temperature of the water to a heated setpoint temperature in response to the water temperature falling below such setpoint temperature. LED diagnostic indicating lights are wired into the water heater circuitry in a manner such that each indicating light is associated with a different one of the electrically coupled components. As the components are sequentially actuated during a water heating cycle, the LED lights are successively illuminated. If one of the components malfunctions during such heating cycle, one or more of the indicating lights remains unilluminated, with the last illuminated light being indicative of the last component in the sequence which functioned properly, thereby facilitating the ready identification of the component which malfunctioned. The LED indicating lights are supported in a single row on a housing-mounted circuit board to which electr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.