Fronius Ohmpilot - Legionella Prevention Function; Adapting the Day Curve

Activating Le-
gionella preven-
tion
CAUTION!
Danger due to Legionella
Legionella bacteria can cause serious illnesses. Despite setting the "Legionella
prevention" function, contamination of the water with Legionella bacteria cannot
be fully ruled out.
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Perform the Legionella prevention function regularly.
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Ensure continuous circulation and extraction of hot water.
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Check the hot water temperature regularly
NOTE!
If the boiler is operated at a temperature < 60 °C for a longer period of time and
a hygienic storage tank is not used, measures must be taken to kill Legionella.
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For private use, it is recommended to run the Legionella prevention function
at least once a week (168 hours). The actual interval depends on the size of
the storage tank and the set temperature.
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A PT1000 temperature sensor is required for this function and can be
sourced from Fronius under item number 43,0001,1188.
When the Legionella prevention system is activated, the hot water is heated to 60
°C at a set interval.
1
Enable the "Temperature sensor present" field
2
Enable the "Legionella prevention (h)" field
3
Enter the desired Legionella prevention cycle
Adapting the day
curve
This function ensures that the user-specified temperature is not undershot. If
there is insufficient surplus current, the external source (if activated) is con-
trolled or power is drawn from the grid to ensure a minimum temperature.
Up to four time periods and minimum temperatures can be defined. For example,
higher hot water temperatures are available in the evening. During the day, more
potential for the surplus is then possible by selecting a lower minimum temperat-
ure.
Adapting the day curve:
1
Enable the "Temperature sensor present" field
2
Enable the "Adapt day curve" field
3
Under "Time from", enter the time from which the Ohmpilot should start to
heat to the new minimum temperature.
4
Under "Time to" enter the time until which the Ohmpilot should heat to the
minimum temperature.
5
Under "Minimum temperature", select the desired end temperature.
NOTE!
Undefined time ranges.
If no time ranges are defined, heating is not provided via the grid or external
source during this time. Only surplus PV energy is used.
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