Gas furnace control system
US4789330A · kind A · utility
29Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1988 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Feb 16, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2233/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The control system of an induced draft furnace includes a provision for turning on the inducer motor when a flame is sensed outside of the normal sequence of a heating operation. In particular, if the thermostat is in the off position when a flame is sensed, the inducer motor is turned on to ensure that sufficient combustion air is provided to the burner so as to forestall the occurrence of flame roll outs in the event that the gas valve is stuck in a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.