en
Commissioning
28
WILO SE 2017-12
6.5.5.3
Sealing chamber monitoring (ex-
ternal electrode)
Connect the external electrode via an evaluation relay. Relay “NIV 101/A” is recommen-
ded for this. The threshold is 30 kOhm.
When the threshold is reached, a warning must be given or the unit must be
switched off.
CAUTION
Connection of the sealing chamber control
If on reaching the threshold, there is only a warning, the pump could be irreparably
damaged by the water ingress. Deactivation of the pump is always recommended!
6.5.6
Motor protection adjustment
Motor protection must be set depending on the selected activation type.
6.5.6.1
Direct activation
At full load, set the motor protection switch to the rated current (see rating plate). At
partial load, it is recommended to set the motor protection switch 5 % above the cur-
rent measured at the duty point.
6.5.6.2
Star-delta activation
The motor protection setting depends on the installation:
▪ Motor protection installed in the motor line: Set the motor protection to 0.58 x the
rated current.
▪ Motor protection installed in the mains supply cable: Set the motor protection to the
rated current.
The maximum start-up time in star connection is 3 seconds.
6.5.6.3
Soft starter
At full load, set the motor protection switch to the rated current (see rating plate). At
partial load, it is recommended to set the motor protection switch 5 % above the cur-
rent measured at the duty point. The following points must also be observed:
▪ Power consumption must always be below the rated current.
▪ Complete starting and stopping within 30 s.
▪ To avoid power dissipation, bypass the electronic starter (soft start) once normal oper-
ation is reached.
6.5.7
Operation with frequency con-
verter
Operation on the frequency converter is permitted. Refer to the appendix for the relev-
ant requirements!
7
Commissioning
WARNING
Foot injuries due to a lack of protective equipment!
Danger of (serious) injuries during work. Wear safety shoes!
7.1
Personnel qualifications
▪ Electrical work: A qualified electrician must carry out the electrical work.
▪ Operation/control: Operating personnel must be instructed in the functioning of the
complete system.
7.2
Operator responsibilities
▪ Providing installation and operating instructions by the pump or at a place specially re-
served for it.
▪ Making the installation and operating instructions available in the language of the per-
sonnel.
▪ Making sure that the installation and operating instructions are read and understood by
all personnel.
▪ All safety devices and emergency cut-outs on the system-side must be active and
checked to ensure that they work properly.
▪ The pump is suitable for use under the specified operating conditions.
7.3
Direction of rotation check (for
three-phase current motors only)
The pump is factory-checked and adjusted to the correct direction of rotation for a
clockwise rotating field. Connection is made in accordance with the specifications in
chapter “Electrical connection”.
Direction of rotation check
A qualified electrician checks the rotating field at the mains connection with a rotating
field-test device. For the correct direction of rotation, a clockwise rotating field must
be available at the mains connection. The pump is
not
approved for operation with a
