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Caution
Antilegionella function is not shown in the menu “Protective functions”. It is instead shown as submenu of the
corresponding special function.
Special functions with AL are: Solid fuel boiler (s. „7.3.7. - Solid fuel boiler“ on page 39), Solar (s. „7.3.8. -
Solar“ on page 40), Burner(s. „7.3.11. - Burner“ on page 42 ), Circulation (s. „7.3.19. - Circulation“ on page
49) and Compressor (s. „7.3.13. - Compressor“ on page 44).
6.3. - Antilegionella
6.3.1. - AL T set
The Antilegionella function is used to heat the system in selected time periods to eliminate legionella bacteria.
Settings range: On, Off
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
Protective functions
6.3.2. - AL residence time
This determines the time span for which the AL T set temperature must be reached for a successfull AL heat up.
Settings range: 1-120 min / Default setting: 60 min
6.3.3. - Last AL heat up
6.3.4. - AL sensor 1
This displays the date and time of the last successful heat up.
No settings
This sensor is used to measure the AL temperature.
Settings range: S1-S8, VFS1-2, Active storage/ Default setting: none
6.3.5. - 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
6.3.6. - 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
Caution
The antilegionella function is switched off at delivery.
Caution
Whenever heating-up has been carried out with the antilegionella function switched on, an information mes-
sage with the date appears on the display.
During the antilegionella function the storage tank is heated up above the set value “Tmax S(X)”, which can
lead to scalding and damage to the system.
Danger
This antilegionella function does not provide complete protection against Legionella, because the controller
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 temperature, 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
