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Introduction
Congratulations on the purchase of the ELRO Pro PK4910 carbon monoxide detector! A carbon
monoxide detector sounds an alarm at elevated carbon monoxide (CO) levels and warns you of
potentially life-threatening situations. Carbon monoxide is an invisible, odourless and tasteless gas
and cannot be detected naturally. A carbon monoxide detector is therefore indispensable in every
home in which combustion appliances are present.
Contents of the package
• Carbon monoxide detector
• Mounting bracket
• Assembly parts (2 screws and
2 plugs)
• User manual
Product description
a. Siren
b. LCD display
c. Test/mute button
d. Standby indicator (green)
e. Alarm indicator (red)
f. Error indicator (yellow)
g. On/off switch
About carbon monoxide (CO)
What is carbon monoxide?
Carbon monoxide (CO) is an invisible, odourless and tasteless gas and cannot be detected
naturally. It is a combustion by-product produced by the combustion of carbonaceous fuels such as
natural gas, petroleum, coal and wood. If incomplete combustion occurs, the amount of carbon
monoxide can quickly rise to a dangerous level. There may be various combustion appliances in
and around houses that can possibly lead to increased CO concentrations, such as:
• Heating equipment: central heating boiler, (open) fireplace, (gas) heater.
• Water heaters: geyser, boiler, combi boiler (combines heating and hot water).
• Cooking appliances: stove/gas stove, gas oven, barbecue.
• Other devices: generator, motor vehicle, power tools.
Health effects of carbon monoxide
Adverse health effects arise because CO binds to haemoglobin (Hb) in the blood and takes the
place of oxygen, as blood is transported through the vessels. This allows less oxygen to reach the
organs and muscles in the body. As a result, various health problems can arise:
• Exposure to 100-200 ppm: Mild headache, nausea, vomiting, fatigue (often described as 'flu-
like' symptoms).
• Exposure to 200-400 ppm: Severe headache, confusion, dizziness, accelerated heart rate.
• Exposure to >400 ppm: Unconsciousness, coma, heart/lung failure, death.
