Preparation Work; Electrical System; Direction Of Rotation; Motor Protection - Homa H119 Originalbetriebsanleitung

• All personnel working on the machinery must
have received, read and understood the operating
instructions.
• Activate all safety equipment and emergency
switch-offs before commissioning.
• Electrotechnical and mechanical settings must only
be carried out by specialists.
• This machinery is only suitable for the use under the
indicated operating conditions.

5.5. Preparation 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 in-
formation. Small oil leakages of the floating ring seals on
delivery are not problematic, but they must be removed
before lowering/immersion into the pump 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 prior to use so that no deposits lead
to obstructions.
• The pump pit must be cleaned for wet installation
• The pressure-sided and suction-sided pipework
system must be cleaned and all gate valves must be
opened.
• The pump casing must be flooded, e.g. it must be
filled completely with the medium and it must not
contain any more air. The de-aeration can be car-
ried out by means of suitable venting devices in the
system or, if available, by air-vent screws on the
pressure socket.
• 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. The motor must be
connected according to the wiring diagram. Note the di-
rection of rotation! In the event of the wrong direction of
rotation the machine does not perform as indicated and it
can become damaged under unfavorable circumstances.
Check the operating voltage and ensure the equal power
consumption of all phases according to the machine data
sheet. Ensure that all temperature sensors and monitor-
ing devices, e.g. sealing chamber control, are connected
and tested for functionality.
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

No check is required for single phase motors, since
these always run in the correct direction of rotation.The
direction of rotation must be checked in three phase
motors before commissioning. When using HOMA
switchgear with LED for direction of rotation, this
control indicator flashes in the event of wrong direction
of rotation. The check can be carried out by observation
of the start-jerk. To do so, place the pump vertically onto
the floor, slightly on the edge and switch on for a short
time. When seen from above, the pump rebounds slightly
anticlockwise in the 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 rota-
tion in pumps that are already installed can be carried out
by comparison of the pumping height and the pumping
quantity 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 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
connected to electric circuits in which frequent interfer-
ences occur, we recommend additional installation of safe-
guarding 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/single phase motors must be connect-
ed to switchgear with motor circuit breaker and an opera-
tion condenser. Original HOMA switchgears are available
as accessories (see switchgears program). When using
other switchgears, the rated current of the motor must be
considered when laying out the circuit breaker.
Type of Pump
H119 W
Three phase motor
Standard pumps with three phase motors are not equipped
with switchgear with a circuit breaker. These matching
HOMA switchgears are available as accessories.
Operating condenser
µF VAC
30 450
EngliSH | 37