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Special functions
6.5.6. - Anti Legionella
6.5.6.2. - AL T set
This function is used to heat up the system during selected periods to eliminate
legionella bacteria.
This temperature has to be detected for the time set in AL residence time at the
AL sensors for a successful heat up.
This determines the time span for which the AL T set temperature must be de-
tected for a successfull AL heat up.
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 controller is dependent on suf cient
energy being fed in, and it is not possible to monitor the temperatu-
res 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 tem-
perature, 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
6.5.6.3. - AL residence time
6.5.6.4. - Last AL heat
This displays the date and time of the last successful heat up.
This temperature is used to measure the AL temperature.
6.5.6.5. - AL sensor 1
Optional AL sensor
When a second sensor is connected, both sensors must reach and hold the set-
point temperature for the residence time for a successful heat up.
6.5.6.6. - AL Sensor 2
During this periods the AL heat up is attempted.
Relay functions
6.5.6.7. - AL-times
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