Wilo Drain TM 25_6 - Manual (Page 12)

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Installation and operating instructions Wilo-Drain TM 25/6 11
7.2 Electrical connection
DANGER! Risk of fatal injury!
If the electrical connection is not made properly,
there is a risk of fatal injury from an electric
shock.
The electrical connection must be made by an
electrician approved by the local energy supply
company in compliance with the applicable local
regulations [e.g. VDE regulations].
• The type of power supply and its voltage must
correspond to the specifications on the name
plate,
• Fuse in the power supply: 10 A, slow blow,
• Earth the system as required by regulations,
• We recommend the installation of a protective
residual current device (RCD) with a trip current of
< 30 mA (this is mandatory, when used outdoors!).
• To connect the pump to switchgear, the power
supply plug has to be cut off and the connection
cable then has to be wired as follows:
The power socket or switchgear must be installed
in a dry space that can not be flooded.
8 Commissioning
CAUTION! Risk of damage to the pump!
The pump must not run dry. Running dry
shortens the life of the motor and of the
mechanical seal.
You must ensure that the float switch is com-
pletely free to move (TM...-A). You must ensure
that the float switch is completely free to move.
Adjusting the switch level of the float switch
The switching level (point to switch on/off) can be
adjusted by sliding the cable to the float switch
within the holding ring.
If necessary, water can be pumped away to a level
of at least 5 mm by manually lifting the float
switch.
The inward flow of water in the shaft should not
be aimed directly at the pump's suction basket.
This can cause air bubbles to be introduced into
the pump, preventing the pump from working
properly when starting.
The maximum flow rate into the shaft must not
exceed the maximum pump flow rate. Observe the
shaft closely during the commissioning.
9 Maintenance
WARNING! Danger of electric shock!
Dangers from electrical energy must be elimi-
nated
• For all maintenance and repair work on the
pump, it must be electrically isolated and unau-
thorised switch-on must be prevented.
• Any damage to the connection cable must
always be repaired by a properly qualified elec-
trician.
To prevent the pump from seizing, owing to
longer periods of disuse, its proper working should
be checked at regular intervals (every 2 months)
by manually lifting the float switch or by directly
switching it on, to let the pump run briefly.
Even a small amount of wear on the shaft seal ring
or the mechanical seal can lead to pollution of the
pumped liquid, owing to oil leaking from the oil
chamber.
The encapsulated motor may only be opened by
specialist companies or by Wilo customer service.
9.1 Cleaning the pump
Depending on how the pump is used, impurities
can be deposited within the suction basket or
impeller. After use, wash the pump down under
running water.
1. Remove the power. Remove the power plug!
2. Empty the pump
3. The suction basket snaps into the pump hous-
ing. Use a screwdriver to push the catches
back and remove the suction basket.
4. Clean the basket under running water.
5. Undo the 4 screws on the lower part of the
pump housing and remove the housing. Take
care with the O-ring between the pump hous-
ing and the motor housing.
6. Clean the impeller and pump housing under
running water. The impeller must turn freely.
7. Damaged or worn parts must be replaced with
original spare parts.
8. Reassemble the pump in the reverse order.
Wire: Terminal
brown L1
blue N
green/yellow PE