Patent ID: 7021925
Filing Date: 2006-04-04
Classification: F23N

Abstract:
1. An alarm system for use with a fuel-burning appliance, the alarm system comprising: an alarm circuit operable to generate an alarm signal along an alarm line to initiate an alarm response when a first condition is met; a safety module connected to the alarm line and operable to generate a safety module alarm signal along the alarm line when a second condition is met, wherein the alarm response is initiated upon generation of either the safety module alarm signal or the alarm signal along the alarm line, wherein the safety module comprises a carbon monoxide sensor operable to detect a level of carbon monoxide and a processing means connected to the carbon monoxide sensor and operable to generate the safety module alarm signal when the second condition is met, wherein the safety module can be reset and wherein the processing means monitors the duration of operation of the safety module from the most recent reset and initiates the safety module alarm signal after a predetermined time interval has elapsed from the most recent reset.