Wilo -Flumen OPTI-TR 22 Instrucciones De Instalación Y Funcionamiento página 28

en-US
6.5.4.4 Sealing chamber monitoring (ex-
ternal electrode)
6.5.5 Adjustment of the motor protec-
tion
6.5.5.1 Direct start-up
6.5.5.2 Star-delta activation
6.5.5.3 Soft starter
6.5.6 Operation with frequency con-
verter
28
Installation and electrical connection
PTC sensor wiring diagram
10 Center terminal
12 Low temperature connection
Trigger status for temperature controller and limiter
The installed sensor specifies the trigger temperature as part of thermal motor monitoring
using bimetallic strips or PTC sensors. Depending on the thermal motor monitoring version,
the following triggering status must occur when the trigger temperature is reached:
ƒ
Temperature limiter (1 temperature circuit):
The unit must be deactivated once the trigger temperature has been reached.
ƒ
Temperature controller and limiter (2 temperature circuits):
Once the trigger temperature for the low temperature is reached, the motor can deacti-
vate with automatic reactivation. Upon reaching the trigger temperature for the high
temperature limit, the motor must deactivate with manual reactivation.
Note the additional information in the section on potentially explosive areas described in
the appendix!
Connect the external electrode via an evaluation relay. Relay "NIV 101/A" is recommended
for this. The threshold is 30 kOhm.
Once the threshold is reached, a warning must be output or the unit must be switched
off.
Note the additional information in the section on potentially explosive areas in the ap-
pendix!
CAUTION
Connection of the sealing chamber control
If, on reaching the threshold, there is only a warning, the mixer may be irreparably dam-
aged by the water ingress. Deactivation of the mixer is always recommended!
ƒ
Full load
Set the motor protection to the rated current according to the rating plate.
ƒ
Partial load operation
Set the motor protection to 5 % above the current measured at the duty point.
ƒ
The motor protection setting depends on the installation:
–
Motor protection in the motor line: Set the motor protection to 0.58 x rated current.
–
Motor protection installed in the mains supply cable: Set the motor protection to the
rated current.
ƒ
The maximum start-up time in the star connection: 3 s
ƒ
Full load
Set the motor protection to the rated current according to the rating plate.
ƒ
Partial load operation
Set the motor protection to 5 % above the current measured at the duty point.
Note the following:
ƒ
Current consumption must always be below the rated current.
ƒ
Complete starting and stopping within 30 s.
ƒ
To avoid power dissipation, bypass the electronic starter (soft start) once normal opera-
tion is reached.
Operation on the frequency converter is permitted. Refer to the appendix for the relevant
requirements!
WILO SE 2021-10