Explosive Environments; Transportation And Storage; Electrical Connection - Homa H 106 Serie Original-Manuel D'instructions De Montage

3.4. Explosive Environments

For operation of the pumps in explosive environments
only models with explosion-proof motors (model Ex) must
be used.
For each individual installation the explosion classification
of the pump must be approved by the local authorities.
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 instruc-
tions.

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 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 operating, an expert check must secure that all
required electrical protection measures exist. the connec-
tion 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 10 m.
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 environments.
6.1. Connection of 1 Ph-motors
Pumps with 230 V/1Ph-motors are supplied with cable and
control box incl. plug ready for installation. HOMA-
Controllers, e.g. for double pump stations are available as
accessory. If any other control unit is used, make sure that
the motor starter is set according to the nominal current
consumption of the pump motor (see pump label).
6.2. Connection of 3 Ph-motors
Pumps with 3Ph-motors are supplied with cable and con-
troller with motor starter. HOMA-Controllers, e.g. for dou-
ble pump stations are avalaible as accessory. If any other
control unit is used, make sure that the motor starter is set
according to the nominal current consumption of the pump
motor (see pump label).
Start-Art
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 / 3 Ph power supply. The motor cable
wires indicated U, V, W must be connected to the power
supply wires indicated L
according to fig. 1.
6.3. Temperature Sensors (H 119, H 121)
The explosion proof models of H 119 and H 121 pumps
have a set of temperature sensors built in the stator wind-
ings. The contact of these sensors opens in case of
overtemperature and switches off the motor power supply.
Standard models of H 119 and H 121 pumps with
temperature sensors are available upon request.
Standard models of 1 Ph-motors have the sensors (built in
upon request) internally connected, so that no external
connection to the control box is necessary. When the
motor cools, it is switched on again automatically.
Standard models of 3 Ph-motors have the sensors (built in
upon request) connected to the motor power supply cable,
the wire ends marked T
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.
Explosion proof models (1 Ph and 3 Ph) have a set of
lock-out-device temperature sensors with a higher switch-
off temperature of approx. 140°C, connected to the motor
cable, the wire ends marked T
connected to the safety circuit of the control box in order
to provide a manual re-start, when the motor cools. This
can be done by switch-off the mains power supply and
switch on again after approx. 5 minutes.
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 direc-
tion of rotation 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 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 the like).
12
, L , L through the motor starter
1 2 3
and T . They must be connected
1 3
and T . They must be
1 2