Wilo Wilo-CronoBloc-BL, Installation And Operating Instructions Manual

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English
32 WILO SE 11/2013
NOTE
• The PTC thermistor sensor terminals must not be supplied with more
than 7.5 V. Higher voltages will destroy the PTC thermistor sensors.
• The mains connection to the terminal board is dependent on the
motor power P
2
, the mains voltage and the start-up type. The recom-
mended switching arrangement of the connection bridges in the ter-
minal box should be taken from the following table and Fig. 13.
• When connecting automatic switching devices, observe the relevant
installation and operating instructions.
7.3 Standby heating connection We recommend standby heating for motors which, due to climatic
conditions, are at risk of condensation (e.g. stationary motors in moist
atmospheres, or motors exposed to extreme variations in tempera-
ture). Corresponding motor variations which are equipped with
standby heating at the factory, can be ordered as a special version.
Standby heating is used to protect the motor windings against con-
densation water inside the motor.
• The standby heating is connected to the terminals HE/HE in the ter-
minal boxes (connection voltage: 1~230 V/50 Hz).
NOTE
• The standby heating may not be switched on during motor operation.
8 Commissioning
Safety DANGER! Risk of fatal injury!
Failure to install safety devices on the terminal box or module
cover or near the coupling can cause electrical shock or contact
with rotating parts, potentially resulting in life-threatening inju-
ries.
• After commissioning or maintenance, all safety devices such as
terminal box covers, module covers or coupling covers that were
removed must be reinstalled!
• Keep a safe distance during commissioning.
Fig. 13: Mains connection
L1 L2 L3
W2 U2 V2
U1 V1 W1
L1 L2 L3
W2 U2 V2
U1 V1 W1
W2 U2 V2
U1 V1 W1
Start-up type Motor power P
2
 3 kW Motor power P
2
 4 kW
Mains voltage 3 ~ 230 V Mains voltage 3 ~ 400 V Mains voltage 3 ~ 400 V
Direct ∆ -circuit (Fig. 13 top) Y-circuit (Fig. 13 centre) ∆ -circuit (Fig. 13 top)
Y- ∆ starting Remove connection bridges
(Fig. 13 below) Not possible Remove connection bridges
(Fig. 13 below)