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10 Installation and operating instructions • Wilo-Control SC2.0-Booster • Ed.01/2023-09
5.3 Operating modes
5.3.1 Normal operation with fixed speed
pumps – SC
Fig.4: Normal operation of control device with fixed speed pumps
2 Activation threshold of the base-load pump
3 Deactivation threshold of the base-load pump
4 Activation threshold of the peak-load pumps
5 Deactivation threshold of the peak-load pumps
An electronic pressure transmitter supplies the actual pressure value as a 4…20mA or
0…20mA current signal.
• Set measurement range: System→Sensors→Discharge side measurement range
• Set sensor type: System→Sensors→Discharge side sensor type
There is no option for load-sensitive speed adaptation of the base-load pump, as a result of
which the system works as a two-position controller and keeps the pressure in the range
between the activation and deactivation thresholds.
• Control setting→Setpoints→Switching on and off of BLP
• Control setting→Setpoints→Switching on and off of PLP
• Set the activation and deactivation thresholds relative to the reference setpoint (Control
settings→Setpoints→Setpoints1).
If there is no “external off” message and no fault, and the drives as well as the automatic
system are activated, the base-load pump starts when the activation threshold (2) is fallen
below. If the power requirement cannot be covered by this pump, a peak-load pump or, if
the demand continues to increase, further peak-load pumps (activation threshold (4)) are
switched on.
• Control setting→Standby→Drives, automatic
• Set the activation threshold individually for each pump: Control setting→Setpoint-
s→Switching on and off of PLP
When the requirement drops to such an extent that a peak-load pump is no longer required
to meet the requirement, the peak-load pump switches off (deactivation threshold: (5); in-
dividually adjustable per pump).
• Set the deactivation threshold individually for each pump: Control setting→Setpoint-
s→Switching on and off of PLP
If no peak-load pump is active, the base-load pump switches off when the deactivation
threshold (3) is exceeded and after the delay time has elapsed.
• Set the deactivation threshold: Control setting→Setpoints→Switching on and off of BLP
• Set the delay time: Control setting→Setpoints→Delays
Delay times can be set for activation and deactivation of the peak-load pump.
• Set the delay times: Control setting→Setpoints→Delays
5.3.2 Normal operation with speed con-
trol – SCe
With the SCe version, you can choose between 2 control modes:
• p-c
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