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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.15.8 Overtemperature protection for the collector
Line no. Operating line
3850 Collector overtemp prot
If there is a risk of overtemperature at the collector, storage tank charging is continued
to reduce the amount of surplus heat. When the maximum storage tank temperature is
reached, charging is stopped.
If the collector temperature exceeds the temperature level of Overtemperature
protection for the collector, and if the maximum storage tank temperature is not yet
reached, the collector pump is activated (collector temperature > overtemperature
protection for the collector and storage tank temperature < maximum storage tank
temperature).
If the collector temperature drops by the switching differential below the temperature
level of Overtemperature protection for the collector, the collector pump is deactivated
again (collector temperature < overtemperature protection for the collector – switching
differential overtemperature).
If the storage tank temperature increases to the maximum storage tank temperature,
the collector pump is deactivated (storage tank temperature > maximum storage tank
temperature).
If the storage tank temperature drops 1 K below the tank’s safety temperature, the
collector pump is activated again (storage tank temperature < maximum storage tank
temperature –1 K).
Tkol
3850
1 K
1 K
T
t
TSp
ON
OFF
Maximum storage tank temperatur
(4751/5051/2070)
Figure 61: Overtemperature protection for the collector
Key
Line no. Meaning
3850 TKolUe Overtemperature protection for collector
2070 Maximum storage tank temperature (buffer/DHW/swimming pool)
4751 Maximum storage tank temperature (buffer/DHW/swimming pool)
5051 Maximum storage tank temperature (buffer/DHW/swimming pool)
On/Off Collector pump
SdUe Switching differential overtemperature (fixed at 5 K)
t Time
T Temperature
TKol Collector temperature
TSp Storage tank temperature
Collector overtemp prot
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