Wilo -Flumen OPTI-TR 22 Instrucciones De Instalación Y Funcionamiento página 26

en-US
6.5.2.2 Checking resistor in the tempera-
ture sensor
6.5.3 Connection of the three-phase AC
motor
6.5.4 Connection of the monitoring de-
vices
26
Installation and electrical connection
1. Check the insulation resistance.
⇒ Measured value at initial commissioning: ≥ 20 MΩ.
⇒ Measured value at interval measurement: ≥ 2 MΩ.
▶ Insulation resistance checked. If the measured values deviate from the specifications,
consult the customer service.
‡
Ohmmeter available.
1. Measure the resistance.
⇒ Measured value Bimetallic strip: 0 ohms (passage).
⇒ Measured value 3x PTC sensor: between 60 and 300 Ohm.
⇒ Measured value 4x PTC sensor: between 80 and 400 Ohm.
▶ Resistance checked. If the measured value deviates from the specification, consult the
customer service.
ƒ
Connection cable with bare cable ends.
ƒ
The supplied connection diagram contains detailed information about the connection
cable:
–
Cable version
–
Wiring diagram
ƒ
Connect the connection cable to the on-site control.
Wiring diagram of the direct starting power connection
U, V, W Mains connection
Polyethylene Ground
(gn-ye)
Wiring diagram of the power connection for star-delta starting
U1, V1, W1 Mains connection (start of winding)
U2, V2, W2 Mains connection (end of winding)
Polyethylene Ground
(gn-ye)
ƒ
Refer to the attached connection diagram for more precise details regarding the version.
ƒ
The individual wires are designated according to the connection diagram. Do not cut the
wires! There is no additional assignment between the wiring diagram and connection di-
agram.
DANGER
Risk of explosion due to incorrect connection!
If the monitoring devices are not connected correctly, there is a risk of fatal injury due to
explosion in potentially explosive areas! Connection must always be carried out by a
qualified electrician. If used in potentially explosive areas:
• Connect the thermal motor monitoring via an evaluation relay!
• Deactivation by the temperature limiter must be conducted with an reactivation
lock! It must only be possible to restart the unit when the unlock key has been actu-
ated by hand!
• Connect the external electrode (e.g. sealing chamber control) via an evaluation relay
with an intrinsically safe circuit!
• Note the additional information in the chapter on potentially explosive areas found
in the appendix of these installation and operating instructions!
Overview of possible monitoring devices for submersible mixers without Ex approval:
WILO SE 2021-10