Wilo Control EC-Booster Installation And Operating Instructions Manual page 26

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7.1.2 Standby pump
7.1.3 Low water level (dry-running pro-
tection)
7.1.4 Operation with a defective pres-
sure sensor
7.1.5 Pump kick (cyclical test run)
7.1.6 Zero-flow test
7.1.7 Minimum and maximum pressure
monitoring
26
One pump can be used as a standby pump. This pump is not activated during normal opera-
tion. The standby pump is only activated in the event of pump failure due to a fault. The
standby pump is subject to standstill monitoring. The standby pump is therefore activated
during pump cycling and pump kick.
The water level in the break tank can be monitored and reported to the switchgear.
Observe the following points:
• Contact type: NC contact
• Low water: The pumps are switched off after the delay time has elapsed (Menu 5.64).
The error code is shown in the LCD display.
NOTICE! If during the delay time the contact is closed again or the electrode is im-
mersed again, there is no deactivation!
• Reactivation: When the contact has been closed and the delay time has elapsed (Menu
5.63), the system will start automatically.
NOTICE! The fault will be automatically reset, but it will be stored in the fault
memory!
If the pressure sensor does not transfer a measured value (e.g. due to a wire break or de-
fective sensor), all pumps are switched off. Furthermore, the red LED fault signal lights up
and the collective fault signal is activated.
Emergency operation
To ensure water supply in the event of a fault, emergency operation can be activated:
• Menu 5.45
• Number of active pumps
• NOTICE! Control ECe-Booster: The pumps are uncontrolled during emergency opera-
tion!
To avoid longer periods of standstill for the activated pumps, a cyclical test run (pump kick
function) is provided as a factory setting. NOTICE! To deactivate this function: Menu 5.40!
Observe the following points for this function:
• Menu 5.41: Pump kick permitted in "Extern OFF"
Start test run when the pumps are switched off using "Extern OFF"?
• Menu 5.42: Pump kick interval
Time interval after which a test run takes place. NOTICE! The time interval will start
when all pumps are switched off!
• Menu 5.43: Pump kick running time
Pump running time during the test run
NOTICE! Function only available on the Wilo-Control ECe-B switchgear!
When only the base-load pump is being operated in the lower frequency range and at con-
stant pressure, a zero-flow test will be carried out cyclically. To do this, the pressure set-
point is increased for a short period and then reset to the set value. If the system pressure
does not decrease after the pressure setpoint has been reset, there is a zero flow. The
base-load pump is switched off after the follow-up time has ended.
The parameters for the zero-flow test are preset and cannot be altered. The zero-flow test
is activated as a factory setting. NOTICE! To deactivate this function: Menu 5.61!
Maximum pressure monitoring
The overpressure monitoring is always active, i.e. the pressure in the system is continu-
ously monitored. An alarm is triggered under the following conditions:
• The system pressure rises above the overpressure detection threshold (Menu 5.17, fact-
ory setting: 10 bar).
• The delay time for overpressure and underpressure detection has expired (Menu 5.74,
factory setting: 5 s).
If the maximum pressure monitoring triggers an alarm, all pumps are deactivated. The error
code is shown on the LCD display and the red LED lights up. The output for the collective
fault signal (SSM) is activated.
If the pressure falls below the overpressure detection threshold, the alarm is automatically
reset after a short delay.
Installation and operating instructions • Wilo-Control EC/ECe-Booster • Ed.02/2023-08