How It Works - Wilo Control EC-Booster Installation And Operating Instructions Manual

7.1

How it works

p
3
2
Fig. 31: Functional diagram for Control EC-
Booster
p
a
5 2
b
c
Fig. 32: Functional diagram for Control ECe-
Booster
7.1.1 Pump cycling
Installation and operating instructions • Wilo-Control EC/ECe-Booster • Ed.02/2023-08
Wilo-Control EC-Booster
2 Activation threshold
3 Deactivation threshold for base-load pump
4 Deactivation threshold for peak-load pumps
During normal operation, the system maintains a pressure in the range between the activa-
4
tion and deactivation thresholds. Control is carried out as two-position control. A pressure
sensor measures the actual pressure value. If the pressure falls below the activation
threshold, the base-load pump switches on. Depending on the power requirement, the
peak-load pumps are activated one by one. If the deactivation threshold for the peak-load
pumps is exceeded, the system turns off the peak-load pumps one by one. If the deactiva-
tion threshold for the base-load pump is exceeded, the system turns off the base-load
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pump. During operation, a visual indicator appears on the LCD display and the green LED
lights up. To optimise pump running times, pump cycling is carried out regularly.
In the event of a fault, the system automatically switches to a different pump. The error code
is shown on the LCD display and the red LED lights up. The outputs for the collective fault
signal (SSM) and individual fault signal (ESM) are activated.
If the low water level in the break tank (dry-running protection) is reached, all pumps are
switched off. The error code is shown on the LCD display and the red LED lights up. The out-
put for the collective fault signal (SSM) is activated.
Wilo-Control ECe-Booster
a 1-pump operation
b 2-pump operation
c 3-pump operation
3
1 Reference setpoint
2 Activation threshold
3 Deactivation threshold
5 Load-sensitive speed control
1
During normal operation, the system maintains the pressure at the reference setpoint by
comparing the setpoint and actual value. Control is provided by the load-sensitive speed
control of the pumps. A pressure sensor measures the actual pressure value. If the pressure
falls below the activation threshold, the first pump switches on and is used as the base-load
pump with load-sensitive control. If the base-load pump cannot cover the power require-
ment at maximum speed, a second pump is switched on when the system falls below the ref-
erence setpoint. The second pump becomes the base-load pump with load-sensitive con-
trol. The previous base-load pump continues to run at maximum speed as a peak-load pump.
This procedure is repeated as the power requirement increases until the maximum number of
pumps has been reached.
When the power requirement decreases, the pump currently acting as base-load pump is
switched off when it reaches its minimum speed and simultaneously exceeds the reference
setpoint. A pump that was previously acting as a peak-load pump becomes the base-load
pump and takes over the control. This process repeats as the power requirement decreases
until only one pump remains working as a base-load pump. If the deactivation threshold for
the base-load pump is exceeded, the system turns off the base-load pump. During opera-
tion, a visual indicator appears on the LCD display and the green LED lights up. To optimise
pump running times, pump cycling is carried out regularly.
Q
In the event of a fault, the system automatically switches to a different pump. The error code
is shown on the LCD display and the red LED lights up. The outputs for the collective fault
signal (SSM) and individual fault signal (ESM) are activated.
If the low water level in the break tank (dry-running protection) is reached, all pumps are
switched off. The error code is shown on the LCD display and the red LED lights up. The out-
put for the collective fault signal (SSM) is activated.
The base-load pump is regularly switched in order to prevent irregular running times of the
individual pumps. When all pumps are switched off, the base-load pump will change the
next time the system is activated.
Additionally, repeated pump cycling is activated as a factory setting. This causes the base-
load pump to be switched every 6 hours. NOTICE! To deactivate this function: Menu 5.60!
en
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