Recommendations For Prevention Of Legionella Growth - Ariston Nuos Split Flex 150L Manual

Heat pump water heater – OPERATING AND MAINTENANCE INSTRUCTIONS
Do not perform any operations that
4
involve opening the appliance.
5 Do not damage the power supply cable.
Do not climb onto chairs, stools, ladders
6 or unstable supports to clean the
appliance.
Do not attempt to clean the appliance
without first switching it off, removing
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the plug or turning the external switch to
the OFF position.
Do not use the appliance for any
8 purpose 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 to clean the
appliance.
Avoid placing any objects and/or
11
appliance 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;
Damage to the appliance or any underlying objects
caused by the appliance detaching from its fixing
brackets and falling.
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.
Damage to plastic or painted parts.
Damage due to possible water leakage.
Injury from positioning
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