How do Ei CO Alarms Work?
Electrochemical Cell - Provides effective and responsive, long term detection
Carbon Monoxide enters the sensor through a gas diffusion hole. A Graphite filter prevents any external contaminants from entering. A Platinum sensing electrode catalyses the oxidation of the CO.
Combining with the water present in the electrolyte, this reaction causes the voltage to rise. Consequently, a small current flows between the two electrodes.
This output is directly proportional to the amount of CO gas present. The microchip in the unit activates the horn/LED/display to give a warning applicable to the CO level sensed.
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Current
Locating and Positioning CO Alarms
Where should CO Alarms be located?
BS EN 50292 the code of practice for the selection, installation, use and maintenance of domestic CO alarms, recommends the following location for CO Alarms:
•Install a CO Alarm in all rooms where there is a fuel burning appliance
•If there is more than one appliance, but only one CO Alarm is to be installed, the following priority list is recommended:
1.Rooms containing a
2.Rooms where occupants spend most time
3.Rooms in which the appliance is most used
4.If the dwelling is a bedsit the CO alarm should be positioned away from the appliance, but close to the sleeping area
CO Alarms should not be located:
•In an enclosed space e.g a cupboard
•Where it can be obstructed
•Directly above a sink
•Next to a door or window
•Next to an extractor fan or vent
•Where dirt & dust may block the sensor
•In a damp or humid location
•In the immediate vicinity of a cooking appliance
When only one CO Alarm is to be fitted, audibility of the sounder may be a problem in other areas of the property - see page 9 for information on how this can be overcome.
Where should CO Alarms be positioned?
CEILING MOUNTING
Preferred position in rooms containing a fuel burning appliance
CO Alarm
↔ ↔
300 mm min from walls
•
•At least 300mm from any wall and obstructions (e.g. light fitting)
Wall Mounting Option
•
•150mm vertically down from ceiling
•Above the height of any doors or windows
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