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Temperature values which are set too high can lead to scalding or damage to the system. Scalding protection must be provided
by the customer!
6. Protective Functions
The 'Protective functions‘ can be used by specialists to activate and set various pro-
tective functions.
By no means does the controller replace the safety appliances on site!
Seizing Protection
If the anti-seizing protection is activated (daily, weekly, off), the controller switches the outputs on/off at 12:00 noon for 5 seconds to prevent
seizing of the pump/valve after long periods of inactivity.
Frost Protection
If the temperature at the outdoor sensor falls below 1 °C, the solar pump is switched on when frost protection is activated . If the outdoor tem-
perature rises above 1 °C again, the frost protection function is switched off.
Switching the frost protection function off or setting the minimum flow temperature too low can lead to severe damage to the sys-
tem.
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 cir-
culation 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 will only be switched on again, when the collector temperature falls below “SP Toff”.
With the system protection (on), there are increased standstill temperatures in the solar collector and therefore an increased pres-
sure 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 collector. 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 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 protection (depending on
the maximum temperature of the storage or other components) are higher than the collector protection.
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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