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Protective functions
In hydraulic systems with solar when the recooling function is activated excess energy
from the storage tank is fed back into the collector. This only takes place if the temper-
ature in the storage tank is higher than the value “Recool Tsetpoint” and the collector
is at least 20°C cooler than the storage tank and before the storage tank temperature
has dropped below the value “Recool Tsetpoint. In systems with multiple storage
tanks the priority tanks is always cooled rst. If “Priority” is deactivated, (see 6.14), the
storage with the highest temperature is cooled rst.
Recooling setting range: on, off/default setting: off
Recooling Tsetpoint setting range: from 0°C to 99°C/default setting: 70°C
7.6 Recooling
Caution
This function causes energy to be lost via the collector! Recooling
should not be activated by default.
7.5 Collector-Alarm
If this temperature is exceeded at the collector sensor when the solar pump is on a
warning or error message is triggered. A warning message is shown in the display.
Collector alarm settings range: on / off / Default: off
Col. alarm - setting range: 60 °C to 300 °C / Default: 150 °C
With the AL-function activated, the TDC 5 makes it possible to heat the storage in
selectable periods of time to “AL Tset, if the energy source is capable of providing suf-
cient heat.
Sensor 6 has to be connected and is used as additional Switch-off sensor. It has to be
placed at a applicable position in the lower area of the storage or the pipe system.
Switch-on and switch-off hysteresis for the heating is +/- 1°C and applies to the coldest
sensor.
AL residence time” is only succesfully completed when all necessary sensors have a
temperature of ALTset +/-5°C for the set time (storage where sensor 2 is installed).
AL function settings range : On or Off/ Default: Off
AL Tset - settings range: 60°C to 99°C / Default: 70°C
AL residence time: 1 to 120 minutes / Default: 60 min
AL heat: Shows the time of the last successful AL heat up
AL periods- settings range : 00:00 to 23:59 Uhr / Default: 03:00 to 05:00
7.7 Antilegionella
44


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