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6.8. - Anti Legionella
6.8.1. - AL T set
6.8.2. - AL residence time
This function is used to heat up the system during selected periods to eliminate legionella bacteria.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
This temperature has to be detected for the time set in AL residence time at the AL sensors for a successful heat up.
Settings range: 60-99 °C / Default setting: 70°C
This determines the time span for which the AL T set temperature must be detected for a successfull AL heat up.
Settings range: 1-120 min / Default setting: 60 min
Special functions
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Caution
The anti-Legionella function is switched off at delivery.
Whenever heating-up has been carried out with the anti-Legionella function switched on, an information
message with the date appears on the display.
During the anti-Legionella function the storage tank is heated up over the set value “Tmax S(X)”, which
can lead to scalding and damage to the system.
Danger
This anti-Legionella function does not provide complete protection against Legionella, because the cont-
roller is dependent on suf
fi
cient energy being fed in, and it is not possible to monitor the temperatures in
the entire range of the storage tanks and the connected piping system. To provide complete protection
against Legionella bacteria, it must be ensured that the temperature is raised to the necessary tempe-
rature, and at the same time there must be water circulation in the storage tank and piping system by
means of other additional energy sources and external control units.
Caution
6.8.3. - Last AL heat
6.8.4. - AL sensor 1
This displays the date and time of the last successful heat up.
No settings
This temperature is used to measure the AL temperature.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
6.8.5. - AL Sensor 2
Optional AL sensor
When a second sensor is connected, both sensors must reach and hold the setpoint temperature for the residence
time for a successful heat up.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
6.8.6. - AL-times
During this periods the AL heat up is attempted.
Setting range: from 00:00 to 23:59 /default setting: 06:00 to 22:00
