Appendix
en
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40
83
13.3.4.3 Frequency converter operation
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Converter type: Pulse-width modulation
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Min./max. frequency during continuous duty:
–
Asynchronous motors: 30 Hz up to rated frequency (50 Hz or 60 Hz)
–
Permanent magnet motors: 30 Hz up to the stated maximum frequency as per
rating plate
NOTICE! The maximum frequency may be below 50 Hz!
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Min. switching frequency: 4 kHz
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Max. overvoltage at the terminal board: 1350 V
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Output current at the frequency converter: max. 1.5 times rated current
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Max. overload time: 60 s
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Torque applications: quadratic pump curve or automatic energy optimisation pro-
cedure (e.g. VVC+)
Required speed/torque curves are available on request!
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Observe additional measures with regard to EMC regulations (choice of frequency
converter, filters, etc.).
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Do not exceed the rated current or rated speed of the motor.
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It must be possible to connect the motor’s own temperature monitoring (bimetallic
strip or PTC sensor).
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If the temperature class is marked as T4/T3, temperature class T3 applies.
13.3.5
Commissioning
DANGER
Risk of explosion when using non-Ex-rated mixers!
Risk of fatal injury due to explosion! Only use mixers which have Ex labelling on the
rating plate within potentially explosive areas.
ƒ
The operator is responsible for defining the potentially explosive area.
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Only Ex-rated mixers may be used within potentially explosive areas.
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Mixers with an Ex rating must be labelled as such on the rating plate.
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Do not exceed the
max. fluid temperature
!
ƒ
According to DIN EN 50495, a safety device with SIL level 1 and hardware fault toler-
ance 0 must be provided for category 2.
13.3.6
Maintenance and repair
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Carry out maintenance tasks according to the regulations.
ƒ
Only carry out maintenance tasks described in these installation and operating in-
structions.
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The spark-proof gaps must
only
be repaired according to the manufacturer’s design
specifications. Carrying out repairs according to the values in tables 1 and 2 of DIN
EN 60079-1 is
not
permitted.
ƒ
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
The paint layer can become electrostatically charged in case of thicker
coats.
DANGER! Risk of explosion! In explosive atmospheres, a discharge can cause
an explosion!
If the housing coating has to be repaired, the maximum coat thickness is 2 mm
(0.08 in)!
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!
