CHAFFOTEAUX 470 VERT, Instruction For Installation And Maintenance

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Information
Legionella is a small bacterium, of stick-like form, and is found naturally in fresh water.
Legionnaire's disease is a serious pulmonary infection caused by inhalation of the
Legionella pneumophilia
bacterium
and other species of
Legionella
. The bacterium is frequently to be found in the plumbing of houses, hotels and
water used in A/C and air cooling systems. The most effective measure against infection is to prevent the bacterium
proliferating in water circuits.
European standard CEN/TR 16355 provides guidelines for preventing the proliferation of Legionella in drinking water
systems, without substituting applicable local legislation.
General recommendations
“Conditions favourable to the proliferation of Legionella”. The following conditions are favourable to the proliferation
of Legionella:
‡ :DWHUWHPSHUDWXUH in WKHUDQJH 25 - 50 °C. To UHGXFHWKHSUROLIHUDWLRQRI/HJLRQHOODWKHZDWHUWHPSHUDWXUHEH
kept with these limits to prevent them growing or reduce their growth to a minimum. If this is not possible, the
drinking water system must be sanitised thermally;
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To
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to run abundantly at least once a week;
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Legionella and should be regularly eliminated from water storage devices, boilers and expansion/holding tanks
(for instance, once a year).
As regards storage heater like the present, if:
1) the appliance is switched off for several months at a time or
2) WKHZDWHUWHPSHUDWXUH is NHSWFRQVWDQW in WKHUDQJH 25 - ƒ&
the Legionella bacterium may grow inside the tank. If such circumstances, to reduce the proliferation of the bacterium,
one must run a thermal sanitisation cycle.
This cycle is suited to use in domestic hot water systems and complies with the guidelines for the prevention of
/HJLRQHOODJLYHQ in 7DEOH 2 RIVWDQGDUG&(175 16355 VHHEHORZ
Table 2 - Types of hot water system
Separate hot and cold water
No
storage
No
circulation
of hot water
Ref. in
Enclosure C
ÜÊ
ð
ð
ð ð ð ð ð ð remove
c
remove
c
remove
c
remove
c
ð ð ð ð
™ ÎÓā
h
™ Ìo
e
™ ÎÓā
h
™ Ìo
e
™ Ìo
e
™ Ìo
e
™ Ìo
e
™ ÎÓā
h
Thermal
disinfection
d
ÜË ÜÌ ÜÍ ÜÎ ÜÏ ÜÐ ÜÑ ÜÒ ÜÊÓ
Temperature
Stagnation
Sediment
Circulation
of hot water
No
circulation
of mixed
water
No
circulation
of mixed
water
No
circulation
of mixed
water
No
circulation
of mixed
water
in
storage
heater
a
in
storage
heater
a
Thermal
disinfection
d
Thermal
disinfection
d
Thermal
disinfection
d
Thermal
disinfection
d
Circulation
of mixed
water
Circulation
of mixed
water
Circulation
of mixed
water
Circulation
of mixed
water
Storage
No storage upline of
the mixer valves
Storage upline
of the mixer valves
No storage upline of
the mixer valves
Mixed hot and cold water
a Temperature • 55°C all day or at least 1h a day •ƒ&
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
minutes at ƒ& for minutes at ƒ& or 5 minutes at °C at all delivery points at least once a
week.
e The water temperature in the circulation circuit may not fall below ƒ&
- Not required