Operating Modes; Operation With Frequency Converter; Operation In An Explosive Atmosphere - Wilo EMU KS Instrucciones De Instalación Y Funcionamiento

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4.3

Operating modes

4.4 Operation with frequency con-
verter
4.5 Operation in an explosive atmo-
sphere
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Product description
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
KS...: The motor can be run non-immersed in continuous duty (S1).
KS... Ex: The motor emerging in "non-immersed" operating mode is permissible.
DANGER! Risk of explosion due to motor overheating! The motor must not emerge
in explosive atmospheres!
▪ Max. fluid and ambient temperature: The max. ambient temperature corresponds to the
max. fluid temperature shown on the rating plate.
"Slurping operation" operating mode
Slurping operation facilitates the pumping of very small amounts of fluid. This operat-
ing mode corresponds to a dry run. DANGER! Risk of explosion due to motor over-
heating! Slurping operation is strictly forbidden in explosive atmospheres!
Operation on the frequency converter is not permitted.
Approval according to
Type ATEX
•
KS 5 Ex
•
KS 6 Ex
–
KS 8
–
KS 9
–
KS 12
–
KS 14
–
KS 15
•
KS 16 Ex
–
KS 20
–
KS 24
–
KS 37
–
KS 70
Key: - = not available/possible, • = 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.
FM CSA
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WILO SE 2018-05