Regulus SRS 3 - D 7.9 - Pump Speed Control

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ulus
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Special functions menu 7
D 7.9 - Pump speed control menu 7.9
If the speed control is activated, the SRS3 makes it possible to vary the speed of standard pumps at relay R1.
This function should only be activated by a specialist. Depending on the pump and pump stage
used, the minimum speed should not be set too low, because otherwise the pump or the system
may be damaged. The information provided by the relevant manufacturer must also be observed!
If in doubt, the min. speed and the pump stage should generally be set to high rather than too low.
D 7.9.1 - Variants of speed control
menu 7.9.1
Off: There is no speed control. The connected pump is only switched on or off with full speed.
Variant V1 - Control to the set ΔT, starts from max. speed:
The pump starts at max. speed. After the purging time (D 7.9.2) the controller switches to the set max. speed.
(D 7.9.4).
If the temperature difference ∆T between the reference sensors (collector and storage tank) is less than
the set value, then the speed is decreased by one stage after the Sweep time (D 7.9.3) elapses. If the
temperature difference between the reference sensors is greater than the set value, then the speed is
increased by one stage after the Sweep time (D 7.9.3) elapses.
If the controller has adjusted the speed of the pump down to the smallest stage and the ∆T between the
reference sensors is ∆T off, the pump is switched off.
Variant V2 - Control to the set ΔT, starts from min. speed:
The pump starts at max. speed. After the purging time (D 7.9.2) the controller switches to the set min. speed.
(D 7.9.5).
If the temperature difference ∆T between the reference sensors (collector and storage tank) is greater than the
set value, then the speed is increased by one stage after the Sweep time (D 7.9.3) elapses.
If the temperature difference between the reference sensors is less than the set value, then the speed is
decreased by one stage after the Sweep time (D 7.9.3) elapses. If the controller has adjusted the speed of
the pump down to the smallest stage and the ∆T between the reference sensors is below T∆off, the pump is
switched off.
Variant V3 - Control to a constant collector temperature, starts from min. speed:
The pump starts at max. speed. After the purging time (D 7.9.2) the controller switches to the set min. speed.
If the temperature at the reference sensor (collector) is greater than the Setpoint (D 7.9.6), then the speed is
increased by one stage after the Sweep time (D 7.9.3) expires.
If the temperature at the reference sensor (collector) is less than the Setpoint, then the speed is decreased by
one stage after the Sweep time (D 7.9.3) expires. If the controller has adjusted the speed of the pump down to
the smallest stage and the ∆T between the reference sensors is less than 1/3 of the required ∆T, the pump is
switched off.
Setting range: V1, V2, V3, off / default setting: off
Variant V4 - for 2 storage tanks
When the valve is set toward the primary storage, speed control works as in V3 (see above). When the valve
is set toward the secondary storage, speed control works as in V2.
Setting range: V1, V2, V3, off / default setting: off
Danger