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5.7. Direction of Rotation
No check is required for single phase motors, since these
always run in the correct direction of rotation.
The indicated conveying and performance data can
only be achieved if a clockwise rotation field is pres-
ent. The machinery is not designed for operation in an
anticlockwise rotation field.
5.8 Motor Protection
The minimal requirement is a thermal relay / circuit break-
er with temperature compensation, differential trigger and
anti-pumping device in accordance with VDE 0660 or the
respective local regulations. If the machinery is connect-
ed to electric circuits in which frequent interferences oc-
cur, we recommend additional installation of safeguarding
equipment (e.g. overvoltage relay, undervoltage relay or
phase failure relay, lightning protection, etc.). The local and
legal regulations must be complied with when connecting
the machinery.
Single phase motor
Pumps with 230 V/1motors possess as standard a 20-m
connecting cable with plug with earthing contact, a motor
protection switch and an operating capacitor.
5.9. Switch-On Types
Switch-on types with plug/switchgears
Insert the plug into the socket provided for this purpose
and activate the on/off switch on the switchgear.
Set the pump at the switchgear to the desired mode of
operation (continuous manual operation or level-depen-
dent automatic operation). Versions without a float switch
begin conveying immediately. Versions with a float switch
are switched on and off automatically, depending on the
liquid level. Set the selector switch at the switchgear to
the "Hand" position for operation without level-depen-
dent switching. After the pump has pumped the medium
away, set the selector switch to the "auto" position again.
5.9.1 After powering up
The rated current is momentarily surpassed during the
start-up process. After termination of this process, the
work current should no longer exceed the rated current. If
the motor does not start right after switch-on, it must be
switched off immediately. Before further switch-on, the
switch pauses must be complied with according to the
technical data. In the event of further interference, the ma-
chine must be switched off immediately. A further switch-
on process may only be started after recovery of the fault.
The following points should be checked:
•
Operating voltage (permitted deviation +/- 5% of the
rated voltage)
•
Frequency (permitted deviation -2% of the rated fre-
quency)
•
Power input (permitted deviation between the
phases, max. 5%)
•
Voltage difference between the individuals phases
(max.1%)
•
Switching frequency and pauses (see technical data)
•
If there is introduction of air in the feed stream, an
28 | ENGLISH
impact plate must be fitted, if appropriate.
•
Minimum submersion in water, level control, protec-
tion against dry run
•
Smooth running
•
Check for leaks and if necessary, follow the required
steps according to the Chapter „Maintenance" .
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