Recommendations For Prevention Of Legionella Growth - CHAFFOTEAUX AQUANEXT PLUS 200 Instructions D'utilisation

Do not perform any operations that involve
4
opening the appliance.
5 Do not damage the power supply cable.
Do not climb onto chairs, stools, ladders or
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unstable supports to clean the appliance.
Do not attempt to clean the appliance
without first switching it off, removing the
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plug or turning the external switch to the
OFF position.
Do not use the appliance for any purpose
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other than normal household operation.
Do not allow children or inexperienced
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persons to operate the appliance.
Do not use insecticides, solvents or
10 aggressive detergents
appliance.
Avoid placing any objects and/or appliance
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beneath the water heater
12 Do not drink the water of condensation
6.4 Recommendations for prevention of Legionella growth (based on European standard CEN/TR 16355)
Informative
Legionella are small rod shaped bacteria which are a natural constituent of all fresh waters.
Legionaries' disease is a serious pneumonia infection caused by inhaling the bacteria Legionella pneumophilia or
other Legionella species. This bacterium is frequently found in domestic, hotel and other water systems and in water
used for air conditioning or air cooling system. Hence the main intervention against the condition is prevention,
through control of the organism in water systems.
The European standard CEN/TR 16355 gives recommendations for good practice concerning the prevention of
Legionella growth in drinking water installations but existing national regulations remain in force.
General recommendations
"Conditions for Legionella growth". The following conditions encourage Legionella growth:
•
water temperature between 25 °C and 50 °C. To restrict the growth of Legionella bacteria, the water temperature
shall be in a range that the bacteria will not grow or have minimum growth, wherever possible. Otherwise, it is
necessary to disinfect a drinking water installation by means of a thermal treatment;
•
stagnation of the water. To avoid long periods of stagnation, the water in every part of the drinking water
installation should be used or flushed at least weekly;
•
nutrients, biofilm and sediment within the installation including water heaters, etc. Sediment can support the
growth of Legionella bacteria and it should be removed on a regular basis from e.g. storage systems, water
heaters, non-flown through expansion vessels (e.g. once a year).
Regarding to this storage water heater, if
1) the product is switched-off for a period of time [months] or
2) the water temperature is constantly maintained between 25°C and 50°C,
the Legionella bacteria could growth inside the tank. In these cases, to restrict the Legionella growth, it is necessary to
perform the so called "thermal disinfection cycle".
This storage water heater is sold with a software that, if it is enabled, carry out a "thermal disinfection cycle" to restrict
the Legionella growth inside the tank.
This cycle complies with the hot water installations and relevant recommendations for Legionella prevention specified
in the following Table 2 of the CEN/TR 16355.
Electrocution due to exposure to live components.
Personal injury caused by burns due to overheated
components, or wounds caused by sharp edges or
protrusions.
Electrocution from non-insulated live wires.
Personal injury caused by falling from a height or cuts
(stepladders shutting accidentally).
Electrocution due to exposure to live components.
Damage to the appliance caused by operation
overload. Damage to objects caused by improper use.
Damage to the appliance caused by improper use.
to clean the Damage to plastic or painted parts.
Damage due to possible water leakage.
Injury from positioning
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