Operation manual of solar controller SR1568
Page 56 of 87
If the temperature difference reaches the adjusted set temperature difference, the pump
speed increases by one step (10%). The response of the controller can be adapted via the
parameter RISE. If the difference increases by the adjustable rise value RIS, the pump
speed increases by 10% until the maximum pump speed of 100% is reached. If the
temperature difference decreases by the adjustable rise value, pump speed will be
decreased by one step 10%.
Note: To enable speed control, the corresponding pump has to be set to (MIN, MAX)
and relay control has to be set to (PULS, PSOL, PHEA or 0-10 V) (under adjustment
menu PUMP).
SMX Maximum tank temperature protection set
If the tank temperature reaches the adjusted maximum temperature, the tank will no longer
be loaded in order to avoid damage caused by overheating. If the maximum tank
temperature is exceeded, Max is displayed.
The sensor for tank maximum limitation (SMAXS) can be selected. The maximum limitation
always refers to the sensor selected. The switch-on hysteresis (HYST) is selectable. Default
is 2
o
C，for example, when tank maximum temperature is set to 70
o
C，then at 68
o
C，
Maximum tank temperature protection function is deactivated automatically.
Note: In systems with 2 tanks or tanks loading in layers, 2 separate menus (LOAD and
LOAD 2) will be displayed.
LST(2) Loading tank
In systems with 2 tanks, the second tank can be switched off with the parameter LST2. If
LST2 is adjusted to OFF, the system runs like the 1-tank system. But the representation in
the display remains 2 tanks.
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