Wilo Padus MINI3 5M Series, Installation And Operating Instructions Manual

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10 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
NOTICE
Pump starts up or is ready for operation!
Once the plug is connected to the socket, the pump
will either start immediately or be ready for opera-
tion:
• Pump without float switch : pump switches on
immediately!
• Pump with float switch : pump is ready for oper-
ation and will switch on depending on the fill
level!
▶ We recommend switching the socket on and
off using a separate main switch!
5.3.2 Connection: Pump without a plug
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!
CAUTION
Irreparable damage as a result of water pen-
etration
Connection cables without plugs feature bare cable
ends. Water may penetrate the connection cable
and pump via these bare cable ends. This will des-
troy both the connection cable and the pump. Never
immerse the bare end of the connection cable in
fluid. Firmly seal it during storage.
The pump has a connection cable with bare cable end. The pump
must be permanently connected to a switchgear. Observe the fol-
lowing points:
• Earth the device properly!
• Provide a motor protection switch!
The minimum requirement is a thermal relay/motor protection
switch with temperature compensation, differential trip and re-
activation lock according to local regulations.
• Install the mains disconnection device!
Minimum requirement: Main switch with all-pole disconnection.
Pump with single-phase AC motor
To connect the pump firmly to the switchgear, cut off the plug.
Carry out connection to a switchgear as follows:
Wire colour Terminal in switchgear
Brown (bn) L (phase)
Blue (bl) N (neutral conductor)
Green/yellow (gn-ye) Earth (protective earth con-
ductor)
Pump with three-phase AC motor
The pump is suitable for connection to a clockwise rotating field.
Check the rotating field with a rotating-field-testing device before
connection and correct if necessary.
CAUTION! The pump is not
approved for operation with a counter-clockwise rotating field!
Carry out connection to a switchgear as follows:
Wire colour Terminal in switchgear
Brown (bn) U
Black (bk) V
Blue (bl) W
Green/yellow (gn-ye) Earth (protective earth con-
ductor)
Adjust the motor protection
Set the motor protection switch to the rated current (see rating
plate).
6 Commissioning
DANGER
Risk of fatal injury due to electrical currents
in accessible basins!
Do not operate the pump if there are persons in
contact with the fluid. In the event of a fault this
may cause death by electric shock! Only activate the
pump when there are no longer any persons in con-
tact with the fluid.
NOTICE
Check the inlet quantity!
The maximum inlet volume flow must be less than
the maximum pump delivery rate. If the inlet quant-
ity is higher, the pump will not be able to pump
away the volume flow. The pump chamber may
overflow!
6.1 Before activating
Check the following prior to activation:
• Has the electrical connection been carried out in accordance
with regulations?
• Has the connection cable been routed safely?
• Can the float switch move freely?
• Temperature of the pumped fluid observed?
• Immersion depth observed?
• Are the pressure pipe and pump sump free of deposits?
• All gate valves in the pressure pipe open?
6.2 Switching on and off
The pump is switched on and off depending on the version:
• Pump with plug, without float switch
The pump will switch on immediately after the plug has been
inserted into the socket. To switch off the pump, pull the plug.
• Pump with plug and float switch
The pump will switch on and off automatically on reaching the
switching level: