Operating Modes And Operation Principle - Wilo Control SC-L Notice De Montage Et De Mise En Service

English
POTENTIALLY fatal danger due to electrical
voltage!
When performing work on the uncovered
switchgear, there is a risk of fatal electric
shocks occurring. All work on individual
components must be performed by a qualified
electrician.
NOTE
Following a power supply interruption, the
switchgear will automatically start up in the last
operating mode set!

6.1. Operating modes and operation principle

The switchgear can distinguish between the
following two operating modes:
• Empty
• Fill
NOTE
To change the operating mode, all pumps must
be deactivated. For this, set the value "OFF" in
menu 3.1.0.0.
6.1.1. "Empty" operating mode
The reservoir or pump chamber is drained. The
connected pumps are activated when the level
rises and switched off when the level falls. This
control is mainly used for water drainage.
6.1.2. "Fill" operating mode
The reservoir is filled up, for instance, to pump
water out of a well into a rainwater storage tank.
The connected pumps are activated when the
level falls and switched off when the level rises.
This control is mainly used for water supply.
6.1.3. Operating principle
In automatic mode, the connected pump(s) are
actuated depending on the fill levels defined.
Measurement of the individual fill levels can be
performed via a float switch or a level sensor:
Fig. 3: Illustration of the switching points with a float switch in the
"Empty" operating mode using the example of two pumps
1 Base-load pump ON
2 Peak-load pump ON
Base-load and peak-
3
load pump OFF
• Level measurement via a float switch
Up to five float switches can be connected to the
switchgear:
• Base-load pump ON
• Peak-load pump ON
• Base-load and peak-load pump OFF
• Dry-running protection
• High water
This enables actuation of 1 or 2 pumps.
The float switch should be equipped with an NO
contact i.e. on reaching or exceeding the switch-
ing point, the contact is closed.
40
4 Dry-running protection
5 High water
Fig. 4: Illustration of the switching points with a level sensor in the
"Empty" operating mode using the example of two pumps
1 Base-load pump ON
2 Base-load pump OFF
3 Peak-load pump ON
4 Peak-load pump OFF
* Also realised via a float switch for increased operational
reliability.
Fig. 5: Illustration of the switching points with a level sensor in the
"Fill" operating mode using the example of a submersible pump
1 Pump ON
2 Pump OFF
Dry-running protection for submersible pump (realised
5
via the "External OFF" contact)
• Level measurement via a level sensor
A level sensor can be connected to the switch-
gear, with which up to 10 switching points can be
defined:
• Base-load pump On/Off
• Peak-load pump 1 On/Off
• Peak-load pump 2 On/Off
• Peak-load pump 3 On/Off
• Dry-running protection
• High water
This enables actuation of 1 to 4 pumps.
On reaching the first activation point, the base-
load pump is switched on. When the second
activation point is reached, the peak-load pump
is cut-in after the set activation delay time has
elapsed. A visual indicator appears on the LC
display and the green LED lights up while the
pump(s) is/are in operation.
On reaching the deactivation points, the base-
load pump and peak-load pump are switched off
after the set stop delay and the set follow-up
time for the base-load pump have elapsed.
To optimise pump running times general pump
cycling can take place each time all pumps are
switched off or periodical pump cycling depend-
ing on a preset operation time can take place.
During operation, all safety functions are active.
In case of one pump malfunctioning, automatic
changeover to a fully-functional pump takes
place. An optical alarm signal is output and the
collective fault signal contact (SSM) is active.
Once dry run level or high water level is reached,
a visual alarm signal is output, the collective fault
signal contact (SSM) and high water alarm contact
(only in case of overflow) are active. In addition
forced switch-on or switch-off of all available
pumps takes place to increase operational relia-
bility.
OPERATION AND FUNCTION
5 Dry-running protection
6 High water
Dry-running protec-
7
tion*
8 High water*
3 High water
4 Low water
WILO SE 05/2016 V05 DIN A4