en
Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
27
•
The maximum start-up time in the star connection: 3 s
6.5.5.3 Soft starter
•
Full load
Set the motor protection to the rated current according to the rating plate.
•
Partial load operation
Set the motor protection to 5 % above the current measured at the duty point.
Please observe the following points:
•
Current 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 opera-
tion is reached.
6.5.6
Operation with frequency con-
verter
Operation on the frequency converter is permitted. Refer to the appendix for the relevant
requirements!
7
Commissioning
NOTICE
Automatic activation after power cut
Depending on the process, the product is switched on and off using sep-
arate controls. The product may automatically switch on following power
cuts.
7.1
Personnel qualifications
•
Operation/control: Operating personnel, instructed in the functioning of the complete
system
7.2
Operator responsibilities
•
Provide installation and operating instructions by the mixer or at a place specially re-
served for it.
•
Make the installation and operating instructions available in a language the personnel
can understand.
•
Make 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 mixer is suitable for use under the specified operating conditions.
7.3
Direction of rotation monitoring
The mixer is checked at the factory and set to the correct direction of rotation for a clock-
wise rotating field. Connection is made in accordance with the specifications in chapter
“Electrical connection”.
Checking the direction of rotation
Fig. 12:
Correct direction of rotation
✓
Mains connection with clockwise rotating field present.
✓
Rotating field inspected by a qualified electrician.
✓
No persons are allowed in the working area of the mixer.
✓
Mixer securely installed.
WARNING! Do not hold the mixer in your hands! The high starting torque can lead to
serious injuries!
✓
Propeller is visible.
1.
Activate the mixer.
Max. operation duration: 15 s!
2.
Propeller direction of rotation:
View from front: Propeller rotates clockwise (towards the right).
View from rear: Propeller rotates anti-clockwise (to the left).
NOTICE! Mixer type OPTI-TR 80-3 rotates in the opposite direction! The mixer ro-
tates clockwise when viewed from the front and anti-clockwise from the rear.
▶
Direction of rotation correct.
Incorrect direction of rotation
If the direction of rotation is incorrect, change the connection as follows:
•
Direct starting: swap two phases.
•
Star-delta starting: Swap connections of two windings (e.g. U1/V1 and U2/V2).
NOTICE! After changing this connection, check the direction of rotation again!
