Regulus SRS 3 - Page 37

37
│
R
EGULUS - SRS 3 Controller - www.re
g
ulus.
eu
Special functions menu 7
D 7.9.2 - Purging time menu 7.9.2
During this time the pump starts up at its full speed (100 %) to ensure reliable starting. Only after this purging
time does the pump run with speed control and switches to the max. or min. speed, depending on the variant
set.
Setting range: from 5 to 600 seconds / default setting: 8 s
D 7.9.3 - Sweep time
menu 7.9.3
The control time is used to determine the delay for speed control in order to avoid large temperature
oscillations as much as possible. Longer delay should be set for systems with less collectors and long pipes
from collectors to the storage tank. Shorter delay then for larger systems with a shorter distance to the storage
tank. The meaning of the parameter is described above (D 7.9.1).
Setting range: Sweep time 1-15 min. / default setting: 4 min.
D 7.9.4 - Max. speed menu 7.9.4
The maximum starting speed of the pump at relay R1 is specified here.
Setting range: 70-100 % / default setting: 100 %
The indicated percentages are guide values that may vary to a greater or lesser extent depending
on the system, pump and pump stage.
D 7.9.5 - Min. speed menu 7.9.5
The minimum starting speed of the pump at relay R1 is specified here.
Setting range: from 30 to max. speed -5 % / default setting: 50 %
The indicated percentages are guide values that may vary to a greater or lesser extent depending
on the system, pump and pump stage.
D 7.9.6 - Setpoint menu 7.9.6
This value is the control setpoint for variant 3. If the value at the collector sensor drops below the Setpoint, the
speed is reduced. If it rises above the Setpoint, the speed is increased.
Setting range: 0 - 90 °C / default setting: 60 °C
When adjusting the min. speed, also the Sweep time shall be adjusted!
Setting the Sweep time: The Sweep time shall be long enough for the solar pump to move the solar medium at
min. speed round the solar system (the liquid runs one round).
Set the Variant 3 of speed control and the Setpoint (7.9.6) to 0 °C. Set the Sweep time (7.9.3) to 15 min. and
the Purging time (7.9.2) to 5 sec.
After starting the system, wait for the temperature to stabilize, for about 15 min. At the 15th minute the speed
will increase. Measure time from that moment and follow the temperature at the collector sensor. It will start
sinking after a while. Wait for another 15 minutes and note down the collector temperature each minute. The
time needed for the collector temperature to calm down after the speed change is the min. time to be set as
the Sweep time.
Caution
Caution