en
Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
15
OPTI-TR 50-3 ...
EXCEL-TRE 50-3 ...
OPTI-TR 60-3 ...
EXCEL-TRE 60-3 ...
OPTI-TR 80-3 ...
OPTI-TR 90-2 ...
EXCEL-TRE 90-2 ...
OPTI-TR 120-1 ...
Motor winding: Temperature limiter
o
o
o
o
o
o
o
o
Motor winding: Temperature controller and
limiter
•
•
•
•
•
•
•
•
Pre-chamber (external pencil electrode)
o
o
o
o
o
o
o
o
With FM approval
Motor winding: Temperature limiter
•
•
•
•
•
•
•
•
Motor winding: Temperature controller and
limiter
o
o
o
o
o
o
o
o
Pre-chamber (external pencil electrode)
•
•
•
•
•
•
•
•
With CSA Ex rating
Motor winding: Temperature limiter
•
•
•
•
•
•
•
•
Motor winding: Temperature controller and
limiter
o
o
o
o
o
o
o
o
Pre-chamber (external pencil electrode)
o
o
o
o
o
o
o
o
Key
− = not possible, o = optional, • = standard
All the monitoring devices fitted must always be connected!
Monitoring the motor compartment and sealing chamber
The motor compartment monitoring protects the motor winding from short-circuits. Seal-
ing chamber control detects fluid ingress from the gear chamber. In each case, the humidity
is recorded by an electrode in the motor compartment and sealing chamber.
NOTICE! The Ex version does not feature this monitoring unit!
Motor winding monitoring
Thermal motor monitoring protects the motor winding from overheating. A temperature
limiter with a bimetallic strip is fitted as standard. Once the activation temperature has
been reached, deactivation with reactivation lock must take place.
Optionally, the temperature can also be measured using a PTC sensor. Thermal motor mon-
itoring can also be designed as temperature control. This allows two temperatures to be
measured. Once the low activation temperature has been reached, an automatic reactiva-
tion can be initiated after the motor has cooled down. The unit is forced to deactivate with
reactivation lock once the high activation temperature has been reached.
External monitoring of the pre-chamber
The pre-chamber can be equipped with an external pencil electrode. The electrode re-
gisters fluid ingress through the mechanical seal on the fluid side. An alarm or deactivation
of the mixer can therefore occur via the system controller.
5.3
Operation with frequency con-
verter
Operation on the frequency converter is permitted. Refer to the appendix for the relevant
requirements!
5.4
Operation in an explosive atmo-
sphere
Approval according to
OPTI-TR 50-3 ...
EXCEL-TRE 50-3 ...
OPTI-TR 60-3 ...
EXCEL-TRE 60-3 ...
OPTI-TR 80-3 ...
OPTI-TR 90-2 ...
EXCEL-TRE 90-2 ...
OPTI-TR 120-1 ...
IECEx
o
o
o
o
−
o
o
−
