Wilo Flumen OPTI-TR 20-1 Instrucciones De Instalación Y Funcionamiento página 319

13.3.4.2 Sealing chamber monitoring (ex-
ternal electrode)
13.3.4.3 Frequency converter operation
13.3.5 Commissioning
13.3.6 Maintenance and repair
13.3.6.1 Repair of housing coating
13.3.6.2 Replacing the connection cable
13.3.6.3 Changing the mechanical seal
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 28-1, 30-1, 40-1 Wilo-Flumen EXCEL-TRE 20, 30, 40
Appendix
Connection values: max. 250 V(AC), 2.5 A, cos φ = 1
▪ Connect the PTC sensor via an evaluation relay. Relay "CM-MSS" is recommended for
this. The threshold is preset.
▪ Connect the external pencil electrode via an Ex-rated evaluation relay! Relay "XR-4..." is
recommended for this.
The threshold is 30 kOhm.
▪ The connection must be made using an intrinsically safe circuit!
▪ Type of converter: Pulse-width modulation
▪ Continuous duty: 30 Hz up to rated frequency (50 Hz or 60 Hz).
▪ Min. switching frequency: 4 kHz
▪ Max. overvoltages on the terminal board: 1350 V
▪ Output current on the frequency converter: max. 1.5 times rated current
▪ Max. overload time: 60 s
▪ Torque applications: quadratic curve
Speed/torque curves required are available on request!
▪ Observe additional measures with regard to EMC regulations (choice of frequency con-
verter, filters, etc.).
▪ Never 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.
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.
▪ The operator is responsible for defining the potentially explosive area.
▪ Only Ex-rated mixers may be used within potentially explosive areas.
▪ Mixers with an Ex rating must be labelled as such on the rating plate.
▪ Do not exceed the max. fluid temperature!
▪ According to DIN EN 50495, a safety device with SIL level 1 and hardware fault toler-
ance 0 must be provided for category 2.
▪ Carry out maintenance tasks according to the regulations.
▪ Only carry out maintenance tasks mentioned in these installation and operating in-
structions.
▪ The spark-proof gaps may only be repaired according to the manufacturer's design
specifications. It is not permitted to carry out repairs according to the values in tables 1
and 2 of DIN EN 60079-1.
▪ Only use screw plugs as stipulated by the manufacturer, that at least correspond to a
strength class of 600 N/mm² (38.85 long tons-force/inch²).
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)!
Changing the connection cable is strictly prohibited!
Changing the seal on the motor side is strictly prohibited!
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