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Please check the following points:
•
Cable run - no loops, slightly tightened
•
Check temperature of the medium and submersion
depth - see machinery data sheet
•
If a tube is used for pressure, this must be rinsed with
clear water so that no deposits lead to obstruction.
•
Check accessories, pipework, suspension devices for
firm and correct fitting
5.6. Electrical system
The respective local and VDE regulations must be com-
plied with when choosing and installing the electrical
leads as well as connecting the motor. The motor must be
protected with a circuit breaker.
Electric shock hazard!
Faulty dealing with current may jeopardize your life!
All pumps with free cable ends must be connected by
a qualified electrician.
5.7. Direction of rotation
For 3Ph motors, the direction of rotation must be checked
before commissioning. If a HOMA switch is used with a
rotation direction indicator, this will illuminate if the direc-
tion of rotation is incorrect. The check can be done by
observing the start-back. To do this, place the pump ver-
tically on the ground and turn it on briefly. When viewed
from above, the pump is slightly counter-clockwise when
the direction of rotation is correct.
The correct direction of rotation of the pump is given
when the pump moves counterclockwise, as the motor is
clockwise as viewed from the top.
In the case of pumps already installed, the correct direc-
tion of rotation is checked by comparing the discharge
height and the flow rate with different directions of ro-
tation.
The direction of rotation with the larger discharge height
and flow rate is the correct direction of rotation.
If the direction of rotation is wrong, 2 phases of the mains
connection must be exchanged. The pumps are supplied
as standard with CEE power plug. The phases are inter-
changed by 180 ° rotation of the round holder plate at the
plug poles with a screwdriver.
The stated specifications and performance can only be
achieved if there is a clockwise rotating field. The machine
is not designed for use on a left rotating field.
5.8. Motor protection
The minimal requirement is thermal relay / circuit break-
er with temperature compensation, differential trigger
and anti-pumping device in accordance with VDE 0660/
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, under voltage relay or
phase failure relay, lightning protection, etc.). The local
and legal regulations must be complied with when con-
necting the machinery.
Pumps with 3Ph-motors must be connected to a separate
control box with motor starter, available from the HOMA
accessory program. If any other than an original control
unit is used, make sure that the thermal relay in the motor
starter is set according to the nominal current consump-
tion of the pump motor (see data on pump label).
5.9. Start-up methods
Start-up with plug
Plug the connector into the socket provided and press the
on/off switch on the switching device.
5.9.1. After turning on
The nominal current is briefly exceeded on start-up. After
completion of this operation, the operating current should
not exceed the nominal current. If the motor does not start
immediately after switching on, it must be shut down im-
mediately. The switch breaks according to the technical
data must be adhered to before turning on again. If there
is a new fault, the machine must again be shut down im-
mediately. The machine may be powered-on again only
after troubleshooting.
The following items should be checked:
•
Operating voltage (permissible deviation +/- 5% of
the rated voltage)
•
Frequency (permissible deviation -2% of the rated
frequency)
•
Current consumption (permissible deviation between
phases max. 5%)
•
Voltage difference between the individual phases
(max. 1%)
•
Switching frequency and pauses (see Technical Data)
•
Air entry at the intake - if necessary, a baffle plate
must be attached
•
Minimum water coverage, level control, dry run pro-
tection
•
Smooth running
•
Check for leaks: if necessary, take the necessary
steps according to the chapter „ Maintenance"
EngliSH | 27
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