en
Product description
12
WILO SE 2017-06
Monitoring of motor winding
The thermal motor monitoring protects the motor winding from overheating. Temper-
ature limiting with bimetallic strip is fitted 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 meas-
urement of two temperatures. When the low temperature is reached, an automatic re-
activation can be initiated after cooling the motor. When the high temperature is
reached, the unit must deactivate with reactivation lock.
Sealing chamber monitoring
▪ FK 17.1, FK 202: The sealing chamber can be equipped with an external pencil elec-
trode.
▪ FK 34, FK 42: This sealing chamber is equipped with an internal pencil electrode.
The electrode registers fluid ingress through the mechanical seal on the fluid side. An
alarm or deactivation of the pump can therefore take place through pump control.
Monitoring of motor bearing
The thermal monitoring of the motor bearing protects the roller bearings against over-
heating. Pt100 sensors are used for temperature measurement.
4.3
Operating modes
Operating mode S1: Continuous duty
The pump can operate continuously at the rated load without exceeding the permiss-
ible temperature.
Operating mode: Non-immersed operation
The “non-immersed operation” operating mode describes the possibility of the motor
emerging during the drainage pumping sequence. This allows a further lowering of the
water level as far as the upper edge of the hydraulics. Observe the following points dur-
ing non-immersed operation:
▪ Operating mode: Continuous duty (S1).
▪ Max. fluid and ambient temperature: The max. ambient temperature corresponds to the
max. fluid temperature shown on the rating plate.
4.4
Operation with frequency con-
verter
Operation on the frequency converter is permitted. Refer to the appendix for the relev-
ant requirements!
4.5
Operation in an explosive atmo-
sphere
FK 17.1
FK 202
FK 34
FK 42
ATEX approval
o
-
-
-
FM approval
o
-
-
-
CSA-Ex approval
-
-
-
-
Key: - = not available/possible, o = optional, • = as standard
For use in explosive atmospheres, the pump must be marked as follows on the rating
plate:
▪ “Ex” symbol of the corresponding approval
▪ Ex classification
For the relevant requirements, refer to the explosion protection chapter in the ap-
pendix of these installation and operating instructions!
ATEX approval
The pumps are suitable for operation in potentially explosive areas, which require
devices belonging to group II, category 2. The pumps can be used in both zone 1 and
zone 2.
These pumps must not be used in zone 0!
FM approval
The pumps are suitable for operation in potentially explosive areas, which require
devices belonging to the protection class “Explosion proof, Class 1, Division 1”. There-
fore, operation in areas with the required protection class “Explosion proof, Class 1, Di-
vision 2” is also possible.
4.6
Rating plate
The following is an overview of the abbreviations and associated data on the rating
plate:
