Wilo Flumen OPTI-TR 20-1 Instrucciones De Instalación Y Funcionamiento página 49

13.3.4 Electrical connection
Type
Motor compartment
Motor winding: Temperature limiter
Motor winding: Temperature controller and lim-
iter
Sealing chamber (external pencil electrode)
13.3.4.1 Monitoring the motor winding
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 28-1, 30-1, 40-1 Wilo-Flumen EXCEL-TRE 20, 30, 40
Appendix
▪ Protection class: Explosionproof
▪ Category: Class I, Division 1
Notice: If the cabling is carried out according to Division 1, installation in Class I, Division 2 is
also permitted.
CSA Ex approval
The mixers are suitable for operation in potentially explosive atmospheres:
▪ Protection class: Explosion-proof
▪ Category: Class 1Division 1
DANGER
Electrocution hazard!
Improper conduct when carrying out electrical work causes death due to electric shock!
Electrical work must be carried out by a qualified electrician in accordance with the local
regulations.
▪ Always connect the mixer to an electrical outlet outside the explosive area. If the connec-
tion must be made within the explosive area, then the connection must be carried out in an
Ex-rated housing (ignition protection class according to DIN EN 60079-0)! Non-observance
may lead to a risk of fatal injury due to explosion! Connection must always be carried out by
a qualified electrician.
▪ All monitoring devices outside the "spark-proof areas" must be connected via an intrinsi-
cally safe circuit (e.g. Ex-i relay XR-4...).
▪ The voltage tolerance may not be higher than max. ±10 %.
Overview of possible monitoring devices:
o o o
• • •
o o o
o o o
Legend
− = not available/possible, o = optional, • = standard
DANGER
Risk of explosion due to overheating of the motor!
If the temperature limiter is connected incorrectly, there is risk of explosion due to over-
heating of the motor! Always connect the temperature limiter to a manual reactivation
lock. This means that a "release button" must be manually activated!
Depending on the version of the thermal motor monitoring, the following triggering status
must occur when the threshold value is reached:
▪ Temperature limiter (1 temperature circuit):
When the threshold is reached, deactivation with reactivation lock must take place!
− − −
o o o
• • •
o o o
en-US
−
o
•
o
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