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5.6 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 the wrong direction of
rotation, the machine does not perform as indicated and it can become damaged under unfavorable
circumstances.
Electric shock hazard!
Improper 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 anticlockwise, since the motor starts clockwise when seen
from above.
Checking 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 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 breaker 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 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 single-phase motors have 30 m connecting cables as standard and must be connected to a
switching device.
The switching device needs to be fitted with different operating capacitors, depending on the type of pump:
Pump type
Operating capacitor
µF
V
AC
H832-15/0,37W
16
450
H832-23/0,55W
20
450
H832-30/0,75W
25
450
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-
dependent 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-dependent switching. After the pump has pumped the
medium away, set the selector switch to the “auto” position again.
Summary of Contents for H832-15/0,37W
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