Homa H500B/7,5 D [11/24] Warranty
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Homa H500B/7,5 D [11/24] Warranty

Homa H500B/7,5 D [11/24] Warranty
11
4. Warranty
Our warranty only covers pumps which are installed and
operated in accordance with these installation and opera-
tion instructions and accepted codes of good practice and
being used for the applications mentioned in
these instructions.
5. Transportation and Storage
Never use the cable or the discharge hose/pipe to lift,
lower, transport or attach the pump. Always use the han-
dle or the rope or a chain to the handle.
The pump may be transported and stored in vertical
or horizontal position. Make sure that it cannot roll or fall
over. For longer periods of storage, the pump should be
protected against moisture, frost or heat.
6. Electrical Connection
Before operation, an expert check must secure that
the required electrical protection measures exist. The
connection to ground, earthing, isolating transformer, fault
current breaker or fault voltage circuit must correspond to
the guidelines set forth by the responsible power plant.
The voltage required in the technical data sheet
must correspond to the existing line voltage.
Submersible pumps used outside of buildings must
have a cable with a minimum length of 10m.
Make sure that the electrical pin-and-socket connec-
tions are installed flood- and moisture-safe. Before start-
ing operation check the cable and the plug against dam-
ages.
The end of the power supply cable must not be sub-
merged in order to prevent water from pene-trating
through the cable into the motor.
The normal separate motor starter/control box of
standard as well as of explosion proof motors must be
installed in explosive enviroments.
6.1. Connection of 1Ph-motors
Pumps with 1Ph motors are supplied with or must con-
nected to a separate control box with motor starter and
capacitor. If any other control unit is used, make sure that
the thermal relay in the motor starter is set according to
the nominal current consumption of the pump motor (see
data on pump label).
6.2. Connection of 3Ph-motors
Pumps with 3Ph-motors are supplied or must be con-
nected to a separate control box with motor starter, avail-
able from the HOMA accessory program. If any other con-
trol unit is used, make sure that the thermal relay in the
motor starter is set according to the nominal current con-
sumption of the pump motor (see data on
the pump label).
Start-Up
The motors are designed for direct-on-line (DOL) start. All
motors with 400 V voltage indication on the pump label
have their motor windings internally star-connected for
operation at 400 V / 3Ph power supply. The motor cable
wires indicated U, V; W must be connected to the power
supply wires indicated L
1
, L
2
, L
3
through the motor
starter according to fig. 1(Page 20).
6.3. Temperature Sensors
Pump types with a motor input above 5,5 kW have a set
of temperature sensors built in the stator windings. The
contact of these sensors opens in case of overtemper-
ature and switches off the motor power supply.
1Ph-motors have the sonsors (built in upon request) in-
ternally connected, so that no external connection to the
control box is necessary. When the motor cools, it is
switched on again automatically.
3-Ph-motors have the sensors are connected to the motor
power supply cable, the wire ends marked T
1
and T
3
.
They must be connected to the safety circuit of the control
box in order to provide an automatic re-start of the motor,
when the motor cools. The switch-off temperature of the
sensors for standard models is approx. 130°C.
6.4. Check of Direction of Rotation
1Ph-pumps do not require any check, as they always run
with the correct direction of rotation.
3Ph-pumps must be checked for correct direction of rota-
tion before start-up.
With smaller pumps the direction of rotation
may be checked by watching the start-jerk.
Put the pump vertical on the ground and lift
one edge. Start the motor. Viewed from
above, the unit must jerk anti-clockwise, as
the correct direction of rotation is clockwise. If
the direction of rotation is wrong, interchange
two of the phases of the electric power supply.
Using an original HOMA control box with CEE-
plug, this may be done by a 180° turning of
the small round pole-socket at theplug-end
with a screwdriver.
7. Installation
Pay attention to the maximum depth of immersion
(see pump label).
If the pump is installed in a sump, the sump opening
must be covered with a tread-safe cover after installation.
The operator has to prevent damage through the
flooding of rooms caused by defects of the pump through
the use of appropriate measures (e.g. installation of alarm
units, backup pump or the like).
7.1. Submerged installation
⇒ Fix the pressure tube at the central top discharge.
Make sure that the hose is not snap off. The hose
must co-ordinate with inside diameter from the
discharge.
⇒ Place the pump into the medium. If the bottom of the
sump is soft or muddy then it is recommended that a
solid foundation of stones or something similar is pro-
vided. Make sure that the inlet suction strainer of
the pump is free and clear of any obstructions.
7.2 Automatic Float Switch Control
The pumps may be supplied with float switch level con-
trollers. They start and stop the pump according to the
liquid level in the pit.
The difference in level between start and stop must be
adjusted by adjusting the free swinging length of the ca-
ble between the float switch and the cable fastening.
Long cable end: Large difference in level.
Short cable end: Small difference in level.

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