Wilo CronoLine-IL Notice De Montage Et De Mise En Service page 51

Setting the motor protection switch:
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
Fig. 17: Mains connection
Activation type
Direct
Y- ∆ starting
Tab. 4: Connection terminal assignment
Installation and operating instructions Wilo-CronoLine-IL, CronoTwin-DL, CronoBloc-BL
• When pumps are used in systems with water temperatures above 90 °C,
a suitably heat-resistant mains connection cable 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.
• Fuse protection on mains side: Dependent on rated 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 (see chapter 5.4
"Accessories" on page 37).
NOTICE:
The connection diagram for electrical connections is in the cover of
the terminal box cover (see also Fig. 17).
• Adjust according to the rated 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-Δ 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 rated motor current.
• The special version of the motor is equipped with PTC thermistor sen-
sors. Connect the PTC thermistor sensors to the PTC thermistor trip-
ping unit.
CAUTION! Risk of material damage!
Risk of damage due to incorrect handling.
• Only a maximum voltage of 7.5 V DC may be applied to the
PTC thermistor sensor terminals. A higher voltage will destroy
the PTC thermistor sensor.
• The mains connection is dependent on the motor power P
voltage and the activation type. The recommended switching
arrangement of the connection bridges in the terminal box should be
taken from the following list "Tab. 4: Connection terminal assign-
ment" on page 45 and Fig. 17.
• When connecting automatic switchgears, observe the relevant instal-
lation and operating instructions.
Motor power P
Mains voltage 3~ 230 V
∆ -connection (Fig. 17 top)
Remove connection bridges
(Fig. 17 below)
NOTICE:
Use of soft starters is recommended to limit the starting current and
preventing tripping of excess current protection devices.
≤ 3 kW
2
Mains voltage 3~ 400 V
Y-connection (Fig. 17 centre) ∆ -connection (Fig. 17 top)
Not possible
English
, the mains
2
Motor power P ≥ 4 kW
2
Mains voltage 3~ 400 V
Remove connection bridges
(Fig. 17 below)
45