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As soon as it has heated up with “AL” turned on, information with the date will be shown in the display.
This anti legionella function does not offer any secure protection against legionella, because the controller requires an
adequate added amount of energy and the temperatures cannot be monitored in the entire storage area and the con-
nected pipe system.
During the operation of the anti legionella function, if applicable, the storage is heated above the set value “Tmax”,
which may lead to scalding and system damage.
System protection
Priority protection function
The system protection should prevent an overheating of the components installed in the system through the forced shut down of
the solar circulation pump. If the value “AS Ton on the collector has been exceeded for 1 Min. the pump will be turned off and not
turn on again in order to protect the collector, for example, from steam. The pump is turned on again when the value “AS Toff on
the collector has not been met.
With the system protection (on), there are increased standstill temperatures in the solar collector and therefore an
increased pressure in the system. The operating manuals from the system components must be observed.
Collector protection
Priority protection function
The collector protection prevents the collector from overheating. A forced switching of the pump makes sure that the collector is
cooled through the storage. If the value “KS Ton is exceeded on the collector, the pump will be turned on in order to cool the col-
lector. The pump is shut down if the value “KS Toff” on the collector is not met or the value “KS Tmax Sp.” on the storage or KS SB
Max on the pool is exceeded.
System protection has priority over collector protection! Even if the switch requirements for the collector protection are
present, the solar circulation pump is turned off once “AS T on is reached. Normally the values from the system pro-
tection (depending on the maximum temperature of the storage or other components) are higher than the collector pro-
tection.
Recooling
In the system hydraulics with solar, excess energy is guided from the storage back to the collector with an activated return cooling
function. This only occurs if the temperature in the storage is greater than the value “Return cooling Tref” and the collector is at
least 20 °C colder than the storage and until the storage temperature has fallen below the value “Return cooling Tref”. For muti-
storage systems, the return cooling applies to all storage.
Energy is lost through the collector through this function! The recooling should only be activated in cases of exception,
with low heat acceptance, for example, during vacation.
Frost Protection
Switching the frost protection function off or setting the minimum flow temperature too low can lead to severe damage
to the system.
Seizing Protection
If the anti-seizing protection is activated, the controller switches the heat pump and the mixer on/off at 12:00 noon for 5 seconds to
prevent seizing of the pump/valve after long periods of inactivity.
Collector alarm
If this temperature at the collector sensor is exceeded when the solar pump is turned on, a warning or error notification is
triggered. There is a corresponding warning in the display.
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