Electrical System; Direction Of Rotation; Motor Protection; Switch-On Types - Homa TP22 Originalbetriebsanleitung

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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 an air. The de-aeration can be carried 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

Check available level controls/protection against dry run
An insulation test and a fill level check must be carried out before commissioning.

5.5. Electrical system

The respective local and VDE regulations must be complied 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 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.
Check the operating voltage and ensure a uniform current consumption for all phases according to the machine
data sheet.
Make sure that all temperature sensors and monitoring devices, such as sealed space controls, are connected
and checked for proper function.
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. Direction of Rotation

No check is required for single phase motors, since these always run in the correct direction.
The direction of rotation must be checked in three phase motors before commissioning. When using a HOMA
switchgear with LED for direction of rotation, this flashes in the event of wrong direction of rotation. The check can
be carried out by observation 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 anticlockwise, 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 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.

5.7. Motor protection

The minimal requirement is thermal relay / circuit breaker with temperature compensation, differential trigger and
anti-pumping device in accordance with VDE 0660/respective local regulations. If the machinery is connected to
electric circuits in which frequent interferences occur, 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/1Ph motors are equipped with a condenser in the motor housing cover.
Three phase motor
Pumps with 3PH motors are equipped with a power contactor in the motor housing cover.

5.8. Switch-on types

Switch-on types with plug
Insert plug into the provided outlet. Pump will start directly. When using a float switch, the pump will start as soon
as the float switch is triggered.
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