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Installation and operating instructions • Wilo-Control SC2.0-Booster • Ed.01/2023-09 15
• A cyclical change of the base-load pump is activated in the factory and can be deactiv-
ated in menu (Control settings→Additional settings→Pump change). The running time
between 2 change procedures is adjustable (Control settings→Additional setting-
s→Pump change).
Standby pump
One or more pump(s) can be defined as a standby pump. Activating this operating mode
results in these pump(s) not being controlled in normal operation. If a pump fails due to a
fault, the standby pump(s) is/are started. However, the standby pumps are subject to
standstill monitoring and are included in the test run. Service life optimisation ensures that
every pump is defined once as a standby pump.
No standby pump is provided for at the factory. Standby pumps can be defined by Wilo
customer service.
Pump test run
To avoid longer downtimes, a cyclical test run of the pumps can be activated. The time
between 2 test runs can be set. In the SCe version, the speed of the pump can be adjusted
(during the test run).
• Activate pump test run: Control settings→Additional settings→Pump test run
A test run is only performed when the unit has been brought to a standstill. Whether the
test run should also take place in the “external off” state can be defined. With drive OFF,
there is no test run.
• Set the pump test run to External off: Control settings→Additional settings→Pump test
run
Low water
A low water signal can be sent to the control system via a normally closed contact by
means of the signal from a suction-side pressure switch or break tank float switch. In the
SCe version, the supply pressure is monitored by an analogue supply pressure sensor. The
pressure threshold for dry-running detection can be defined. The digital low water contact
can be used in addition to the supply pressure sensor.
• Define pressure threshold for dry-running detection: Control settings→Monitoring set-
tings→Dry run
The pumps are switched off after a delay time that can be set has expired. If the signal in-
put is closed again within the delay time or if the supply pressure rises above the pressure
threshold (only for SCe), the pumps are not switched off.
• Set the delay time: Control settings→Monitoring settings→Dry run
The system restart after a deactivation due to low water is performed automatically after
the signal input closes or the supply pressure threshold for cancelling the dry run is ex-
ceeded.
The fault message is reset automatically after the restart, but can be read out from the his-
tory memory.
Monitoring of maximum and minimum pressure
The limit values for safe system operation can be set.
• Set the maximum and minimum pressure limits: Control settings→Monitoring settings
If the maximum pressure is exceeded, the pumps are switched off. The collective fault sig-
nal is activated.
• Set maximum pressure: Control settings→Monitoring settings→Maximum pressure
When the pressure drops below the activation threshold, normal operation is enabled again.
If the pressure does not drop due to the system, the error can be reset by increasing the
switching threshold and then acknowledging the error.
• Reset fault: Interaction/Communication→Alarms→Acknowledge
It is possible to set the pressure threshold of the minimum pressure monitoring and the
delay time. The behaviour of the control device when the pressure falls below the threshold
can be selected: Switch off all pumps or continue operation. The collective fault signal is al-
ways activated in all cases. If “Deactivation of all pumps” is selected, the fault must be ac-
knowledged manually.
• Set minimum pressure: Control settings→Monitoring settings→Minimum pressure
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