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To check the pump's direction of rotation (for three-phase motor),
switch on the pump for a few seconds. Verify that there is vacuum
by putting the palm of your hand on the inlet flange. Another possi-
bility is to compare the direction of rotation of the motor with the
direction indicated by the arrow. Looking at the motor,
plug screw (8).
In case of wrong direction of rotation in three-phase current opera-
tion:
Reverse polarity of two of the three electrical phases.
¨
Three-phase connection
Terminal box connection Star coupling
380-415 V 50 Hz, 380-480 V 60 Hz (Factory
default setting)
F4 F2
Star coupling
High voltage
380-415 V 50 Hz
380-480 V 60 Hz
Electrical connection
Seite / Page 22
remove the
V2
U2
W1
V1
Fan 1 (F1): white
Fan 2 (F2): brown
Fan 3 (F3): green
Fan 4 (F4): yellow
Terminal box connection Delta coupling
190-220 V 50 Hz, 200-240 V 60 Hz
F4 F2
W1
Delta coupling
Low voltage
190-220 V 50 Hz
200-240 V 60 Hz
Single phase connection
Terminal box connection 200-240 V
50/ 60 Hz
Fan 1: white
Fan 2: brown
Fan 3: green
Fan 4: yellow
U2
V2
V1
Fan 1 (F1): white
Fan 2 (F2): brown
Fan 3 (F3): green
Fan 4 (F4): yellow
To reverse rotation
=> reverse Z1-Z2
FO 0015 A
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