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Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
–
Permanent magnet motors: 30 Hz up to the stated maximum frequency as per rating
plate
NOTICE! The maximum frequency may be below 50 Hz!
•
Min. switching frequency: 4 kHz
•
Max. overvoltage at the terminal board: 1350 V
•
Output current at the frequency converter: max. 1.5 times rated current
•
Max. overload time: 60 s
•
Torque applications: quadratic pump curve or automatic energy optimisation procedure
(e.g. VVC+)
Required speed/torque curves are available on request!
•
Observe additional measures with regard to EMC regulations (choice of frequency con-
verter, filters, etc.).
•
Do not exceed the rated current or rated speed of the motor.
•
It must be possible to connect the motor’s own temperature monitoring (bimetallic strip
or PTC sensor).
•
If the temperature class is marked as T4/T3, temperature class T3 applies.
13.3.5
Commissioning
DANGER
Risk of explosion if incorrect mixer is used!
There is a risk of fatal injury from explosion if non-approved mixers are
used in potentially explosive atmospheres!
• Only use approved mixers in potentially explosive atmospheres.
• Check the Ex labelling on the rating plate.
•
The operator is responsible for defining the potentially explosive area.
•
Only use mixers with the appropriate Ex rating in potentially explosive atmospheres.
•
Do not exceed the
max. fluid temperature
!
•
Provide the following safety device in accordance with DIN EN 50495 for category 2:
–
SIL Level 1
–
Hardware fault tolerance 0
13.3.6
Maintenance and repair
•
Carry out maintenance tasks according to the regulations.
•
Only carry out maintenance tasks described in these installation and operating instruc-
tions.
•
The spark-proof gaps must
only
be repaired according to the manufacturer’s design
specifications. Carrying out repairs according to the values in tables 2 and 3 of
DIN EN 60079-1 is
not
permitted.
•
Only use screws as stipulated by the manufacturer, which at a minimum correspond to a
strength class of 600 N/mm² (38.85 long tons-force/inch²).
13.3.6.1 Repair of housing coating
If the housing coating has to be repaired, the maximum coat thickness is 2 mm (0.08 in)!
The paint layer can become electrostatically charged in cases of thicker coats.
DANGER! Risk of explosion! A discharge can cause an explosion in explosive atmo-
spheres!
13.3.6.2 Replacing the connection cable
Changing the connection cable is strictly prohibited!
13.3.6.3 Changing the mechanical seal
Changing the seal on the motor side is strictly prohibited!
