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7.4
Operation in an explosive atmo-
sphere
ATEX approval
FM approval
CSA-Ex approval
ATEX approval
FM approval
CSA-Ex approval
Installation and operating instructions Wilo Motor T 12 ... 72 + EMU FA, Rexa SUPRA, Rexa SOLID
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.
Overview of standard motors
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
Key
− = not available/possible, o = optional, • = as standard
Overview of IE3 motors (derived from IEC 60034)
o
o
o
o
−
−
−
−
−
−
−
−
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 atmospheres:
▪ Device group: II
▪ Category: 2, 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 atmospheres:
▪ Protection class: Explosionproof
▪ Category: Class I, Division 1
Notice: If the cabling is carried out according to Division 1, installation in Class I, Divi-
sion 2 is also permitted.
o
o
o
o
o
−
o
o
o
o
o
o
−
o
o
o
−
−
o
o
o
o
−
−
−
−
−
−
−
−
en
−
o
o
o
−
−
o
o
o
−
−
−
−
−
−
o
o
o
−
−
−
−
−
−
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