LOCKOUT ALGORITHM FOR A FURNACE INCLUDING A POLLUTANT SENSOR

摘要

A furnace system responsive to a thermostat (34) includes a pollutant sensor (60) for sensing a pollutant concentration in the furnace system. The pollutant sensor (60) is configured to open when the pollutant concentration reaches a pollutant threshold and close when the pollutant concentration falls below the pollutant threshold. When the thermostat (34) is calling for heat, a furnace controller (50) monitors the pollutant sensor (60) and disables the furnace system for a lockout period if a lockout criterion related to the pollutant sensor (60) is met.