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Ariston abs vls evo inox pw 80 d [18/28] General recommendations
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Anti-legionella recommendations (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 pneu-
mophilia 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 preven-
tion of Legio-nella 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 tem-
perature 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
• nutrients, and sediment within the installation including water heaters, etc. Sediment can sup-
port the growth of Legionella bacteria and it should be removed on a regular basis from e.g. storage
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 kept constant in the range 25 - 50°C and the Legionella bacteria could grow in
the tank. In such circumstances, reduce the proliferation of the bacteria by running a “thermal sanitisation
cycle”. Water heaters are sold with software that allows a “thermal sanitisation cycle” to be run when it is
activated in order to reduce the proliferation of Legionella in the tank. This cycle is suitable for domestic
hot water systems and complies with the guidelines for the prevention of Legionella stipulated in Table 2 of
standard CEN/TR 16355 (see below).
Table 2 - Types of hot water system
Separate hot and cold water Mixed hot and cold water
No storage Storage
No storage upline
of the mixer
valves
Storage upline
of the mixer
valves
No storage upline
of the mixer
valves
No
circulation
of hot water
Circulation
of hot water
No
circulation
of mixed
water
Circulation
of mixed
water
No
circulation
of mixed
water
Circulation
of mixed
water
No
circulation
of mixed
water
Circulation
of mixed
water
No
circulation
of mixed
water
Circulation
of mixed
water
Ref. in
Annex C
C.1 C.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9 C.10
Temperature
- ≥ 50 °C
e
in
storage
heater
a
≥ 50 °C
e
thermal
disinfection
d
thermal
disinfection
d
in
storage
heater
a
≥ 50 °C
e
thermal
disinfection
d
thermal
disinfection
d
thermal
disinfection
d
Stagnation
- ≤ 3 l
b
- ≤ 3 l
b
- ≤ 3 l
b
- ≤ 3 l
b
- ≤ 3 l
b
Sediment
- -
remove
c
remove
c
- - remove
c
remove
c
- -
a Temperature ≥ 55°C all day or at least 1h a day ≥60°C.
b Volume of water contained in the pipes between the circulation system and the most distant tap.
c Remove the sediment from the storage heater as required by local conditions, but no less frequently than once a year.
d Thermal disinfection for 20 minutes at 60°C, for 10 minutes at 65°C or 5 minutes at 70 °C at all delivery points at least once a week.
e The water temperature in the circulation circuit may not fall below 50°C.
- Not required
Electromechanical water heaters are sold with the thermal sanitisation cycle disabled (default setting). If, for
some reason, any of the above “conditions in favour of the proliferation of Legionella” occurs, it is strongly
recommended to enable this function according to the instructions found in this manual [see <<Activating
the “thermal disinfection cycle” (anti-legionella)>>].
However, the thermal disinfection cycle does not kill all Legionella bacteria in the storage tank. It follows that
if the function is disabled, the Legionella bacteria may reoccur.
Note: when the software perfor
ms the thermal sanitisation treatment, it is likely that the power consumption
of the water heaters increases.
RU
EN
18 39
Содержание
- Ariston thermo s p a 1
- Caution observe all general warnings and safety standards listed at the begin ning of this text in full all such instructions are obligatory 15
- Emptying the appliance 15
- Maintenance regulations for competent person 15
- Replacing parts 15
- Startup and commissioning 15
- Electrical connection 16
- Hydraulic connection 16
- Multi position installation 16
- Caution observe all general warnings and safety standards listed at the begin ning of this text in full all such instructions are obligatory 17
- Installing norms for the installer 17
- Installing the appliance 17
- Table 3 product information 17
- Technical characteristics 17
- Anti legionella recommendations european standard cen tr 16355 18
- General recommendations 18
- However the thermal disinfection cycle does not kill all legionella bacteria in the storage tank it follows that if the function is disabled the legionella bacteria may reoccur note when the software performs the thermal sanitisation treatment it is likely that the power consumption of the water heaters increases 18
- In storage heate 18
- Informative 18
- 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 pneu mophilia 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 preven tion of legio nella growth in drinking water installations but existing national regulations remain in force 18
- No storage storage no storage upline of the mixer valves 18
- No storage upline of the mixer valves 18
- Separate hot and cold water mixed hot and cold water 18
- Storage upline of the mixer valves 18
- Table 2 types of hot water system 18
- General safety standards 19
- Meaning 19
- Symbol 19
- Warning type of risk 19
- General safety instructions 21
- Загальні вимоги з безпеки 24
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