en
Commissioning
28
WILO SE 2021-05
Fig. 11: Correct direction of rotation TR 212/
TRE 312
NOTICE! Reverse direction of rotation for mixer types TR 212 and TRE 312! The mix-
ers rotates clockwise 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!
7.4
Operation in an explosive atmo-
sphere
Approval according to
TR 212...
TR 216...
TRE 216...
TR 221...
TRE 221...
TR 226-3...
TRE 226-3...
TRE 312...
TR 316...
TRE 316...
TR 321...
TRE 321...
TR 326-3...
TRE 326-3...
ATEX
o
o
o
o
o
o
o
o
o
o
o
o
o
o
FM
o
o
o
o
o
o
o
o
o
o
o
o
o
o
CSA-Ex
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 of the corresponding approval
ƒ
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 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, Di-
vision 2 is also permitted.
