Wilo CronoLine-IL Notice De Montage Et De Mise En Service page 34

Preparation/notes
Setting the motor protection switch
Installation and operating instructions Wilo-IL/-DL/-BL
DANGER! Risk of fatal injury!
Contact voltage can be life-threatening
Work on the terminal boxes may only be started once 5 minutes
have passed, due to the dangerous residual contact voltage
(capacitors).
• Before working on the pump, disconnect the power supply and
wait for 5 minutes.
• Check to ensure all connections (including potential-free contacts)
are voltage-free.
• Never use an object to poke around the openings on the terminal
box and never insert anything into the terminal box!
WARNING! Risk of mains overload!
An inadequate mains design can lead to system failures and even to
cable fires due to mains overload.
• When designing the mains, with regard to the cable cross-sections
and fuses, give special consideration to the fact that short-term
simultaneous operation of all pumps is possible in multi-pump
operation.
• The electrical connection must be made in accordance with
VDE 0730/part 1 via a fixed power cable, which is provided with a plug
device or an all-pole switch with a contact opening width of at least
3 mm.
• In order to ensure drip protection and strain relief on the threaded
cable connection, cables with a sufficient outer diameter must be
used and must be screwed sufficiently tightly. Also, the cables near
the threaded cable connection are to be bent to form a drainage loop,
to drain any accumulated drips. Position the threaded cable connec-
tion or lay the cables accordingly to ensure that no drips can run into
the module. Non-assigned threaded cable connections must remain
sealed with the plugs provided by the manufacturer.
• The connection line is to be placed in such a way that it can under no
circumstances come into contact with the pipe and/or the pump and
motor housing.
• When pumps are used in systems with water temperatures above
90 °C, a suitably heat-resistant connection line must be used.
• Check the current type and voltage of the mains connection.
• Observe the rating plate information for the pump. The current type
and voltage of the mains connection must correspond to the specifi-
cations on the rating plate.
• Mains side fuse protection: dependent on nominal motor current.
• Take additional earthing into account!
• The motor must be secured against overloading using a motor pro-
tection switch or the PTC thermistor tripping unit.
NOTE
• The connection diagram for electrical connections is in the cover of
the terminal box cover (see also Fig. 12).
• Set according to the nominal motor current specified on the rating
plate of the motor, Y- starting. If the motor protection switch is
switched in the supply line to a Y- contactor combination, set the
switch as for direct starting. If the motor protection switch is switched
in a thread of the motor supply line (U1/V1/W1 or U2/V2/W2), set the
motor protection switch to 0.58 x nominal motor current.
• The special motor design is equipped with PTC thermistor sensors.
Connect the PTC thermistor sensors to the PTC thermistor tripping
unit.
English
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