Maintenance And Repair - Wilo Flumen OPTI-TR 20-1 Instrucciones De Instalación Y Funcionamiento

en-US
13.3.4.2 Sealing chamber monitoring (ex-
ternal electrode)
13.3.4.3 Operation on frequency converter ▪ Type of converter: Pulse-width modulation
13.3.5 Commissioning
13.3.6

Maintenance and repair

13.3.6.1 Repair of housing coating
50
Appendix
▪ Temperature controller and limiter (2 temperature circuits):
When the threshold for the low temperature is reached, the motor can deactivate with au-
tomatic reactivation. When the threshold for the high temperature is reached, the motor
must deactivate with reactivation lock!
CAUTION! Motor damage due to overheating! In the event of automatic reactivation,
comply with the specifications for the maximum switching frequency and switching
break!
Connection of the thermal motor monitoring
▪ Connect the bimetallic strip via an evaluation relay. Relay "CM-MSS" is recommended for
this. The threshold is preset.
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!
▪ 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 converter,
filters, etc.).
▪ Never exceed the rated current or rated speed of the motor.
▪ It must be possible to connect the motor's own temperature monitor (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 Ex approval 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 tolerance 0
must be provided for category 2.
▪ Carry out maintenance tasks according to the regulations.
▪ Only perform maintenance work which is described in these 'Installation and operating in-
structions'.
▪ The spark-proof gaps may only be repaired according to the manufacturer's design specifi-
cations. 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!
WILO SE 2019-01