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Idiomas disponibles
Idiomas disponibles
•
Stagnant water. To avoid the stagnation of water over long periods, the water present in all parts of the drinking water
installation must be used or must be allowed to flow abundantly at least once a week.
•
Nutrients, biofilm, and sediment present in the installation, including water heaters etc. The sediment can encourage the
growth of bacteria of the Legionella genre. It must therefore be eliminated regularly from storage systems, water
heaters, and expansion vessels where water can stand (once a year, for example).
With regard to this type of storage water heater, if:
1) the appliance is turned off for a certain time [months] or;
2) the temperature of the water is kept constantly at between 25°C and 50°C;
Legionella bacteria can develop inside the reservoir. In this case, a heat purification cycle must be available to reduce the
growth of Legionella. The electromechanical storage water heater is sold with a thermostat configured for a temperature higher
than 60°C, so it enables a heat purification cycle to reduce the growth of Legionella in the reservoir. This cycle should be used
in the installations for the production of domestic hot water. It meets the recommendations for the prevention of Legionella
specified in Table 2 of CEN/TR 16355, reproduced below.
Hot and cold water separately
No storage
No
circulatio
n of hot
water
Ref. in
C.1
Annex C
Temperatur
-
e
Stagnation
-
-
Sediment
a Temperature >55°C the whole day or at least 1 h per day >60 °C.
b The volume of water contained in the pipework between the circulation system and the tap which has the greatest distance to the system.
c Remove the sediment from the storage water heater in accordance with the local conditions but at least once a year.
d Thermal disinfection for 20 min at a temperature of 60°C, for 10 min at 65°C or for 5 min at 70°C at every draw-off point at least once a week.
e The water in the circulation loop shall not be less than 50°C.
- No requirement
III.2.2. Servicing
➢ Each year (twice a year if the water is treated using a softener), the appliance must be drained to perform the
following:
1. Check the wear on the magnesium anode.
2. Remove deposits from inside the tank. Contact your fitter.
IV.
IV.1. Maintenance
Each year (twice a year if the water is treated using a softener), the appliance must be drained to
perform the following:
1. Check the wear on the magnesium anode.
2. Remove deposits from inside the tank
Table 2 - Types of hot water installation
Storage
No
Circulation
With
circulation
of mixed
circulati
water
of mixed
on of
water
hot
water
C.2
C.3
C.4
In the
≥
≥
50°C
50°C
storage
e
water
a
heater
≥
≥
b
3 l
-
3 l
-
c
Remove
Remove
MAINTENANCE AND REPAIR
EN
Mixed hot and cold water
No storage
upstream of
Storage upstream of
mixing valves
No
Circulati
circulatio
on of
circulation
mixed
n of
of mixed
water
mixed
water
C.5
C.6
Thermal
Thermal
e
storage
disinfecti
disinfecti
d
d
on
on
heater
≥
b
b
-
3 l
-
-
c
Remove
31
No storage
upstream of
mixing valves
mixing valves
No
Circulation
No
of mixed
circulatio
water
n of
water
mixed
water
C.7
C.8
C.9
≥
In the
e
50°C
Thermal
Thermal
disinfecti
water
disinfectio
d
on
a
d
n
≥
b
-
3 l
-
-
c
c
Remove
Circulati
on of
mixed
water
C.10
Thermal
disinfecti
d
on
≥
b
3 l
-
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