Technical InformationGas MetersVarious Auxiliary EquipmentTechnical DocumentsControllers /Shutoff ValvesAlarms[Causes of CO Poisoning Incidents in Commercial Kitchens]① Many commercial kitchen appliances are not tted with safety equipment② Due to the large size of the combustion appliance, the gas consumption is high or the appliance is used indoors in an enclosed place③ Deterioration of gas equipment over time and insufcient maintenance④ As people are not aware of the importance of ventilation, they make mistakes in the arrangements of air supply, air exhaust, etc.[Ventilation Warning Alarm for Commercial]A Ventilation Warning Alarm for Commercial is an alarm that generates an alarm upon detecting carbon monoxide (CO) being generated due to incomplete combustion in a commercial kitchen appliance.By integrating the CO density and detection time, the COHb (carboxyhemoglobin) concentration in human blood is estimated, and an accurate audible alarm is given before it exerts a dangerous effect on the human body.Installation is easy as it is battery-powered and does not require an electrical outlet.*A typical CO alarm is extremely sensitive to CO, so it is frequently triggered by even a small amount of CO generated. Fearing that this will impede operations, there is a risk that the user may turn off the power supply of the alarm.[Installation of Ventilation Warning Alarm for Commercial]Install the alarm at a horizontal distance of 50 cm to 8 m from the combustion appliance in the same room where the appliance is installed, and at a range of 170 ±20 cm from the oor at a location where the indicator lamp of the alarm can be easily identied.* Install the alarm at a distance of more than 1.5 m away from ventilation ports and air outlets of air conditioners, etc.* Do not install the alarm in places which are partitioned by suspended partition walls of more than 60 cm.* Do not install near ventilation fans, air inlets, airy places near doors, etc.■ Examples of places where it should not be installed■ Carbon monoxide poisoning symptomsCarbon monoxide concentration (%) in the airInhalation time and poisoning symptomsAlarm soundstart time0.02Mild headache in frontal head area in 2 to 3 hoursApprox. 60 minutes0.04Frontal headache/nausea in 1 to 2 hours, occipital headache in 2.5 to 3.5 hoursApprox. 26 minutes0.08Headache, dizziness, nausea, convulsions in 45 minutes, fainting in 2 hoursApprox. 9 minutes0.16Headache, dizziness, nausea in 20 minutes, death in 2 hoursApprox. 3 minutes0.32Headache, dizziness in 5 to 10 minutes, death in 30 minutesApprox. 5 seconds0.64Headache, dizziness in 1 to 2 minutes, death in 15 to 30 minutes1.28Death in 1 to 3 minutes50 cm50 cmWithin 8 mRange unsuitable for installation170 ±20 cmCeiling surfaceFloorGas CockAir ventGas stoveMore than1.5 meters from air inlets, air vents, etc.Suspended partition wall more than 60 cm● Range hood, ceiling, etc.The ventilation warning alarm may be delayed or detection may not work.● Places exposed to water● Places exposed to strong vibrations or impactsThe alarm could be damaged.The alarm could be damaged.● Places directly exposed to exhaust gases, steam or soot from combustion appliances and the steam of cooking alcoholThe sensor’s service life may be shortened or there may be false alarms.ProhibitedProhibitedProhibitedProhibited● Range hood, ceiling, etc.The ventilation warning alarm may be delayed or detection may not work.● Places exposed to water● Places exposed to strong vibrations or impactsThe alarm could be damaged.The alarm could be damaged.● Places directly exposed to exhaust gases, steam or soot from combustion appliances and the steam of cooking alcoholThe sensor’s service life may be shortened or there may be false alarms.ProhibitedProhibitedProhibitedProhibited● Range hood, ceiling, etc.The ventilation warning alarm may be delayed or detection may not work.● Places exposed to water● Places exposed to strong vibrations or impactsThe alarm could be damaged.The alarm could be damaged.● Places directly exposed to exhaust gases, steam or soot from combustion appliances and the steam of cooking alcoholThe sensor’s service life may be shortened or there may be false alarms.ProhibitedProhibitedProhibitedProhibitedImportance of Ventilation Warning Alarm for CommercialLine equivalent to COHb 20% in blood10020040060080010003020504060Detection time (min.)Detected CO density (ppm)Relationship between CO density and timeAlarm rangeAlarm rangeMonitoring rangeBoiled noodle machineLarge ovenMounting example42Importance of Ventilation Warning Alarm for Commercial
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