Key; Requirements For Thermal Disinfection - Franke AQUA 3000 open Notice De Montage Et De Mise En Service

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Key

Warning!
Failure to observe can result in bodily injury or even death.
Caution!
Failure to observe can result in material damage.
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Important!
Failure to observe can cause the product to malfunction.
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Useful information for optimum handling of the product.
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Requirements for thermal disinfection

The basis for carrying out the thermal disinfection is the DVGW Worksheet W 551.
The thermal disinfection must cover the entire system, including all take-off fittings.
All the internal surfaces of a domestic water installation that come into contact with
water must be heated to at least 70 °C for at least 3 minutes (e.g. material temper-
ature shower head). So the water in the domestic water heater must be heated to
> 70 °C (e.g.: 85 °C).
The take-off temperature (or better the surface temperature) must be measured at
each take-off point.
In order that the entire system in circulation systems (hot water and circulation lines)
is covered by this measure, all take-off points must be closed during the heating up
phase of the domestic water heater. The circulation pump must be operated in
continuous running mode. This operating condition is retained until a temperature of
70 °C is reached in the circulation.
Only then can the take-off points be flushed one after another with the outlet open.
Depending on the size of the installation and the routing of the lines, the thermal
disinfection must be carried out in sections. In order to prevent recontamination of
the system, the individual sections must be subjected to thermal disinfection immedi-
ately one after the other.
It may be necessary to interrupt the thermal disinfection until the domestic water
heater heats up again.
The installation must be returned to the proper operating mode after completing the
thermal disinfection. This means that each fitting must be actuated in order to drain
hot water (over 42 °C).
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