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Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
7.4
Operation in an explosive atmo-
sphere
Approval according to
OPTI-TR 50-3 ...
EXCEL-TRE 50-3 ...
OPTI-TR 60-3 ...
EXCEL-TRE 60-3 ...
OPTI-TR 80-3 ...
OPTI-TR 90-2 ...
EXCEL-TRE 90-2 ...
OPTI-TR 120-1 ...
IECEx
o
o
o
o
−
o
o
−
ATEX
o
o
o
o
o
o
o
o
FM
o
o
o
o
o
o
o
o
CSA-Ex
o
−
o
−
o
o
−
o
Legend
− = not available/possible, o = optional, • = standard
Identification of Ex-rated mixers
If the mixer is approved for use in explosive atmospheres, this is marked on the rating plate
as follows:
•
“Ex” symbol of the corresponding approval
•
Ex classification
Observe the explosion protection section!
IECEx certification
The mixers are suitable for operation in potentially explosive atmospheres:
•
Device group: II
•
Category: 2, zone 1 and zone 2
Mixers must not be used in zone 0!
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
•
Device group: II
•
Category: 2, zone 1 and zone 2
Mixers must not be used in zone 0!
FM approval
The mixers 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, Division
2 is also permitted.
CSA Ex rating
The mixers are suitable for operation in potentially explosive atmospheres:
•
Protection class: Explosion-proof
•
Category: Class 1Division 1
7.5
Before switching on
Check the following prior to activation:
•
Has the electrical connection been carried out in accordance with regulations?
•
Has the connection cable been routed safely?
•
Can the float switch move freely?
•
Accessories attached correctly?
•
Temperature of the pumped fluid observed?
•
Immersion depth observed?
•
Intermittent operation: Is the max. switching frequency complied with?
•
Has the minimum water level above the propeller been defined and monitored?
•
Min. fluid temperature can drop below 3 °C: Monitoring device with automatic deactiva-
tion installed?
•
No installations within the direct rotary range of the propeller?
