en
Commissioning
24
WILO SE 2017-12
▪ 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
counter-clockwise rotating field!
CAUTION! If the direction of rotation is checked
with a test run, comply with the ambient and operating conditions!
Incorrect direction of rotation
If the direction of rotation is incorrect, change the connection as follows:
▪ Swap two phases for motors with direct starting.
▪ Swap the connections of two windings (e.g. U1/V1 and U2/V2) for star-delta activation
motors.
7.4
Operation in an explosive atmo-
sphere
DANGER
Risk of explosion due to flying sparks in the hydraulics!
During operation the hydraulics must be flooded (completely filled with the fluid). If
the volume flow is interrupted or the hydraulics emerges, air cushions can form in
the hydraulics. If this happens, there is a risk of explosion, e.g. flying sparks due to
static charge! Dry-running protection must ensure that the pump is deactivated at
the appropriate level.
