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Fig. 10: Correct direction of rotation TRE 312
7.4
Operation in an explosive atmos-
phere
Approval according to
ATEX
FM
CSA-Ex
Installation and operating instructions Wilo-EMU TR/TRE 216 ... 326-3
Commissioning
NOTICE! Reverse direction of rotation for mixer type TRE 312! The mixer rotates clock-
wise when viewed from the front and anti-clockwise from the rear.
Incorrect direction of rotation
If the direction of rotation is incorrect, change the connection as follows:
ƒ
Direct starting: swap two phases.
ƒ
Star-delta starting: Swap connections of two windings (e.g. U1/V1 and U2/V2).
NOTICE! After changing this connection, check the direction of rotation again!
o
o
o
o
o
o
o
o
o
−
o
−
Legend
− = not available/possible, o = optional, • = standard
For use in explosive atmospheres, the mixer must be marked as follows on the rating plate:
ƒ
"Ex" symbol for the relevant approval
ƒ
Ex classification
For the relevant requirements, refer to the explosion protection chapter in the appendix
of these installation and operating instructions!
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
ƒ
Device group: II
ƒ
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:
ƒ
Protection class: Explosionproof
ƒ
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.
o
o
o
o
o
o
o
o
o
−
−
o
o
o
o
o
o
o
o
o
−
o
−
o
en-US
o
o
−
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