Operating Modes; Operation With Frequency Converter; Operation In An Explosive Atmosphere - Wilo Flumen OPTI-TR 20-1 Instrucciones De Instalación Y Funcionamiento

en-US
4.3

Operating modes

4.4 Operation with frequency con-
verter
4.5 Operation in an explosive atmos-
phere
14
Product description
Monitoring of motor compartment
The motor compartment monitoring protects the motor winding from short-circuits. The
moisture is measured by an electrode.
Monitoring the motor compartment and sealing chamber
The motor compartment monitoring protects the motor winding from short-circuits. Sealing
chamber control detects fluid ingress through the mechanical seal on the fluid side. In each
case, the humidity is recorded by an electrode in the motor compartment and sealing cham-
ber.
NOTICE! In the Ex version, this monitoring is omitted!
Monitoring the motor winding
The thermal motor monitor protects the motor winding from overheating. A temperature
limit with bimetallic strip is built-in as standard.
As an option, the temperature can also be measured with a PTC sensor. The thermal motor
monitoring can also be designed as temperature control. This allows the measurement of
two temperatures. When the low temperature is reached, an automatic reactivation can be
initiated after cooling the motor. When the high temperature is reached, the unit must de-
activate with reactivation lock.
External monitoring of the sealing chamber
The sealing chamber can be equipped with an external pencil electrode. The electrode regis-
ters fluid ingress through the mechanical seal on the fluid side. An alarm or deactivation of
the pump can therefore take place through the pump control.
Operating mode S1: Continuous duty
The mixer can operate continuously at the rated load without exceeding the permissible
temperature.
Operation on the frequency converter is permitted. Refer to the appendix for the relevant
requirements!
Approval accord-
ing to
o
ATEX
o
FM
−
CSA-Ex
Legend
− = not available/possible, o = optional, • = standard
For use in explosive atmospheres, the mixer must be marked as follows on the rating plate:
▪ "Ex" symbol for the relevant approval
▪ Ex classification
For the relevant requirements, refer to the explosion protection chapter in the appendix
of these installation and operating instructions!
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
▪ Device group: II
▪ Category: 2, zone 1 and zone 2
− o o
− o o
− − −
o o o
o o o
− − −
WILO SE 2019-01