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Installation and operating instructions • Wilo-Control MS-L • Ed.02/2022-05
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Switchgear installed. Next steps: Connect the power supply, pumps and signal
transmitters.
NOTICE! The Control MS-L...-LS is pre-wired to the lifting unit.
6.4.3
Level control
Control MS-L.../MS-L...-O
Install a level control device for the automatic control of the pumps. Connect one float
switch per pump for this purpose. The float switches must be installed according to the
system's installation plan. Please observe the following points:
•
The float switches can move freely in the operating space (pump chamber, tank)!
•
Do
not undercut
the minimum water level of the pumps!
•
Do
not exceed
the switching frequency of the pumps!
Control MS-L...-LS
The rod float sensor is installed in the lifting unit at the factory. No further float switches
are required.
6.4.4
High water alarm
Control MS-L.../MS-L...-O
Install a separate float switch for detecting the high water level. If there is an alarm, a
forced switch-on
of all pumps occurs!
Control MS-L...-LS
A switching point is stored in the set of parameters for detecting the high water level. No
separate float switch is required. If there is an alarm, a
forced switch-on
of all pumps oc-
curs!
6.5
Electrical connection
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death
due to electric shock!
• Electrical work must be carried out by a qualified electrician!
• Observe local regulations!
DANGER
Risk of explosion if signal transmitters are installed in poten-
tially explosive areas!
The switchgear does not have an intrinsically safe circuit for connecting
the signal transmitters. The signal transmitters must always be installed
outside of potentially explosive areas! The connection must be made by
a qualified electrician.
NOTICE
• Depending on the system impedance and the maximum connections/
hour of the connected consumers, voltage fluctuations and/or drops
may occur.
• When using shielded cables, attach the shielding to the earth rail on
one side of the switchgear!
• Always have connection carried out by a qualified electrician!
• Observe the installation and operating instructions for the connected
pumps and signal transmitters.
•
The mains connection current and voltage must be as stated on the rating plate.
•
Execute fuse protection on the mains side in accordance with the local guidelines.
•
If circuit breakers are used, the switching characteristics should be selected according to
the connected pump.
•
Follow local guidelines if residual-current devices (RCD, type A, sinusoidal current, uni-
versal-current-sensitive) are installed.
Summary of Contents for Control MS-L
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