7.3 Forced operation of the pumps
When the pumps (Pu1, Pu2, Pu3 and Pu4) have not been activated for 24 hours, forced operati
-
on of the pumps is started between 12:00 and 12:01 h. The storage tank charging pump SLP is
started between 12:01 and 12:02 h.
7.4 Flow temperature limitation
The flow temperature limitation is performed separately for each heat exchanger.
If the temperature at the flow sensor VF1, VF2 or VF3 exceeds the maximum flow temperature,
the corresponding heat exchanger is limited to the Max. flow temperature.
2
[Übersicht > Parameter > Wärmetauscher 1…3]
Parameters WE Adjustment range
Vorlauftemp. max
(max. flow temperature)
90 °C 20 to 120 °C
Vorlauftemp. min
(min. flow temperature)
20 °C 20 to 120 °C
Note: The controller does not replace the function of a safety temperature limiter.
7.5 Return flow temperature limitation
The return flow temperature limitation is performed separately for each heat exchanger.
If the temperature at the return flow sensor RüF1, RüF2 or RüF3 exceeds the maximum permissi
-
ble temperature, the output of the corresponding heat exchanger 1, 2 or 3 is restrained while
the other heat exchangers continue to work normally. In firmware version 1.50 and higher, the
restraint is determined by the
Return flow limitation factor (P algorithm).
Note:
–
The current return flow temperature set points, even for restrained heat exchangers, can
be read in the set point menu [Übersicht > Sollwerte].
–
Using weather-compensated control with gradient characteristic, the return flow tempera
-
ture is limited to a fixed value by equating the
Return flow temperature foot and Max. re
-
turn flow temperature
parameters.
EB 5571-2 EN 37
General functions
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