Transport And Storage; Electrical Connection; Connection Of 1 Ph-Motors; Connection Of 3 Ph-Motors - Homa H 501 W(A) Originalbetriebsanleitung

5. Transport 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 a rope or a chain attached 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 voltags 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 pump power supply cable must not be
submerged in order to prevent water from penetrating
through the cable into the motor.
The normal separate motor starter/control box of
standard as well as of explosion proof pumps must
not be installed in explosive enviroments.

6.1. Connection of 1 Ph-Motors

H 501 and H 505 pumps with 1Ph-motors are supplied
with 10 m of cable and plug.
H 502, H 506 and H 508 pumps with 1Ph-motors are sup-
plied with or must be connected to a seperate control box
with motor starter and operating capacitor. If any other
than an original HOMA 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 3 Ph-Motors

Pumps with 3Ph-motors are supplied with or must be con-
nected to a separate control box with motor starter, avail-
able from the HOMA accessory program. If any other than
an original 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).

6.3. Temperature Sensors

The pumps have a set of temperature sensors built in the
stator windings. The contact of these sensors opens in
case of overtemperature and switches off the motor power
supply.

6.4. Check of Direction of Rotation

1 Ph-pumps do not require any check, as they always run
with the correct direction of rotation.
3 Ph-pumps must be checked for correct direction of rota-
tion before start-up. On original HOMA control boxes a
control-light is illuminated, if the direction of rotation is not
correct.
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 clockwise, as the correct
direction of rotation is clockwise. With bigger pumps the
check may also be done by watching the rotation of the
through the discharge or the suction inlet.
impeller
Pumps which are already installed, the
done by comparing head (pump pressure) and flow (quan-
tity of water) at different direction of rotation.
The direction that gives hig-her head and flow is
.
the correct one
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 the plug-
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 like that).
7.1. Submerged installation
⇒ Fix the pressure tube at the Storz-fixed hose-coupling
(equipment supplied at H 502, H 506 and H 508) or
STA hose-coupling 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 control-
lers. They start and stop the pump according to the liquid
level in the pit.
The difference in level between start and stop must be ad-
justed by adjusting the free swinging length of the cable
between the float switch and the cable fastening. Long
cable end:
Short cable end:
Never place the float switch from the three phase pumps
in the sump without fixing the float switch cable to a fixed
point in the sump, because the float switch needs a rota-
tion around the fixing point of the cable to operate without
any problems. Non-observance may cause an overflow
because the pump does not start running or a dry run of
the pump in fact that the pump does not stop, which will
destroy the pump.
11
check may be
Large difference in level.
Small difference in level.