Homa FW-TP 4/1, Оригинальное руководство пользователя

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5.4. Preparatory work
The machinery was constructed and fitted according to
the latest technology, so that it works for a long time and
reliably under normal operating conditions. This requires
however that you comply with all requirements and infor-
mations. Small oil leakages of the floating ring seals on
delivery are not problematic, but they must be removed
before lowering/immersion into the medium.
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
• Check available level controls/protection against dry
run
5.5. 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. The motor must be con-
nected according to the wiring diagram. Note the direction
of rotation! In the event of wrong direction of rotation the
machine does not perform as indicated and it can become
damaged under unfavourable circumstances.
Electric shock hazard! Faulty dealing with current
may jeopardize your life! All pumps with free cable
ends must be connected by a qualified electrician.
5.6. Rotational direction
No check is required for single phase motors, since these
always run in the correct direction. The direction of rota-
tion must be checked in three phase motors before com-
missioning. When using a HOMA switchgear with LED for
direction of rotation, this flashes in the event of wrong di-
rection of rotation. The check can be carried out by obser-
vation of the start-jerk. For this, place the pump vertically
onto the floor, slightly onto the edge and switch on for a
short time. When seen from above, the pump rebounds
slightly anticlockwise in correct direction of rotation.
The direction of rotation is correct if the pump moves an-
ticlockwise, since the motor starts clockwise when seen
from above. The check of the correct direction of rotation
in pumps that are already installed can be carried out by
comparison of the pumping height and the pumping quan-
tity with different directions of rotation.
The direction of rotation with the higher pumping height
and pumping quantity is the correct direction of rotation.
In the event of wrong direction of rotation two phases of
the power supply must be interchanged. As standard, the
pumps are delivered with CEE power plugs.
The interchange of phases is carried out by 180° rotation
of the round holding plate on the poles of the plug with a
screw driver.
The indicated conveying data and performance data can
only be achieved if a clockwise rotation field is present.
The machinery is not designed for operation in an anti-
clockwise rotation field.
5.7. 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, undervoltage relay or
phase failure relay, lightning protection, etc.). The local
and legal regulations must be complied with when con-
necting the machinery.
Single phase motor
Pumps with 230 V/single phase motors have switchgear
with a motor circuit breaker and an operation condenser.
When using other switchgears the rated current of the
motor must be considered when laying out the circuit
breaker. For the FW-TP4/1, a condenser with 30µF must
be used.
3 phase motors
Pumps with three phase motors are provided with a
switchgear with circuit breaker as standard. When using
other switchgears the current of the motor must be con-
sidered when laying out the circuit break (see nameplate).
5.8. Switch-on types
Switch-on types with plug/switchgears
Insert the plug into the socket provided for and use the
on/off switch on the switchgear.
5.8.1. After switching on
The rated current is surpassed quickly during the start-up
process. After termination of this process the work current
should not exceed the rated current. If the motor does not
start immediately after switch-on, it must be switched off
immediately. Before further switch-on the switch pauses
according to the technical data must be complied with.
In the event of a further interference the machine must
be switched off immediately. A further switch-on process
may only be started after recovery of the fault. The follow-
ing points should be checked:
• operating voltage (permitted dev/- 5% of the
rated voltage)
• Frequency (permitted deviation -2% of the rated fre-
quency)
• Power input (permitted deviation between the phases
maximum 5%)
• Voltage difference between the individual phases
(maximum 1%)
• Switching frequency and pauses (see technical data)
• Introduction of air in the feed stream, an impact plate
must be fitted, if appropriate.
• Minimum submersion in water, level control, protec-
tion against dry run
• Smooth run
• Check for leakages, if appropriate take the necessary
steps according the chapter ‘maintenance’