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6.5.5.2 Sealing chamber monitoring (external electrode)
Connect the external electrode via an evaluation relay. Relay
"NIV 101/A" is recommended for this. The threshold is 30 kOhm.
Once the threshold is reached, a warning must be output 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 recom-
mended!
6.5.6
Motor protection adjustment
Motor protection must be set depending on the selected activa-
tion 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 current measured at the
duty point.
6.5.6.2 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 current measured at the
duty point. The following points must also be observed:
ƒ
Power consumption must always be below the rated current.
ƒ
Complete starting and stopping within 30 s.
ƒ
To avoid power dissipation, bypass the electronic starter (soft
start) once normal operation is reached.
6.5.7
Operation with frequency converter
Operation on the frequency converter is not permitted.
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
ƒ
Electrical work: A qualified electrician must carry out the elec-
trical work.
ƒ
Operation/control: Operating personnel must be instructed in
the functioning of the complete system.
18
Commissioning
7.2
Operator responsibilities
ƒ
Providing installation and operating instructions by the pump
or at a place specially reserved for it.
ƒ
Making the installation and operating instructions available in
the language of the personnel.
ƒ
Making sure that the installation and operating instructions
are read and understood by all personnel.
ƒ
All safety devices and emergency cut-outs on the system-
side must be active and checked to ensure that they work
properly.
ƒ
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 direc-
tion of rotation for a clockwise rotating field. Connection is made
in accordance with the specifications in chapter "Electrical con-
nection".
Direction of rotation check
A qualified electrician checks the rotating field at the mains con-
nection 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:
ƒ
Swap two phases for motors with direct starting.
ƒ
Swap the connections of two windings (e.g. U1/V1 and U2/V2)
for star-delta activation motors.
7.4
Before switching on
Check the following prior to activation:
ƒ
Check whether the device has been installed properly and in
accordance with the locally applicable regulations:
–
Has the pump been earthed?
–
Layout of power supply cable tested?
–
Electrical connection made properly?
–
Mechanical components attached correctly?
ƒ
Check level control:
–
Float switches can move freely?
–
Switching level tested (pump on, pump off, minimum water
level)?
–
Additional dry-running protection installed?
ƒ
Test operating conditions:
WILO SE 2019-02
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