Operation In An Explosive Atmosphere; Before Switching On - Wilo EMU KS 5 Ex Notice De Montage Et De Mise En Service

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7.4 Operation in an explosive atmo-
sphere
7.5

Before switching on

230
Commissioning
DANGER
Risk of explosion due to flying sparks in the hydraulics!
During operation the hydraulics must be flooded (completely filled with the fluid). If
the volume flow is interrupted or the hydraulics emerges, air cushions can form in
the hydraulics. If this happens, there is a risk of explosion, e.g. flying sparks due to
static charge! Dry-running protection must ensure that the pump is deactivated at
the appropriate level.
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.
Check the following prior to activation:
▪ Check whether the device has been installed properly and in accordance with the locally
applicable regulations:
– Has the pump been earthed?
– Power supply cable routing tested?
– Electrical connection made according to the regulations?
– Mechanical components attached correctly?
▪ Check level control:
– Float switches can move freely?
– Switching level tested (pump on, pump off, minimum water level)?
– Additional dry-running protection installed?
▪ Test operating conditions:
– Min./max. temperature of the fluid tested?
FM CSA
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WILO SE 2018-05