9
4.7
Wiring diagram
1015-00
Figure 10: Wiring diagram
Legend
U1, V1, W1
=
Live
F1/FO
=
Thermal sensor
PE
=
Earth
S
=
Start
Gr/Yel
=
Green/Yellow
R
=
Run
Di
=
Seal Monitor
C
=
Neutral (common)
4.7.1
Checking direction of rotation
The safety hints in the previous sections must be observed!
When three phase units are being commissioned for the first time and also when used on a new site, the
direction of rotation must be carefully checked by a qualified person.
When checking the direction of rotation, the unit should be secured in such a manner that no danger
to personnel is caused by the rotating impeller, or by the resulting air flow. Do not place your hand into
the hydraulic system!
The direction of rotation should only be altered by a qualified person.
When carrying out the direction of rotation check as well as when starting the unit pay attention to the
START REACTION
as this can be very powerful
ATTENTION
The direction of rotation is correct
if the propeller rotates in a
clockwise manner when viewing
down from the top of the placed
unit.
1019-00
ATTENTION
The start reaction is
anti-clockwise.
Figure 11: Rotor rotation
NOTE
If a number of units are connected to a single control panel then each unit must be
individually checked.
ATTENTION
The mains supply to the control panel should have a clockwise rotation. If the leads
are connected in accordance with the circuit diagram and lead designations, the
direction of rotation will be correct.
