Wilo Drain LPC Betriebsanleitung Seite 13

• Do not lay pipes above the motor to avoid con-
densation water dripping.
• No foot valve is required for mobile systems, since
the pumps are already equipped with a non-return
valve in the intake port.
7.1.2 Installing the pump
• Mobile pump:
Use a trolley to move the pump to the installation
location, set it down on a flat surface and secure it
against rolling away.
• Pump for fixed installation:
Set up the pump at the installation location and
use anchor screws to screw it on to the foundation
at the mounting links.
• Connect suction and pressure lines and seal them
carefully.
• See the catalogue for the installation of the
accessories required.
• Pump with four-stroke combustion engine:
No more installation work required.
• Pump with electric motor:
Connect the electric motor, see section Electrical
Connection.
7.2 Electrical connection (only for electric motors)
DANGER! Danger to life!
If the electrical connection is not established
properly, there is a risk of fatal injury from an
electric shock.
• The electrical connection should only be made
by an electrician approved by the local energy
provider and in accordance with the applicable
regulations.
• Prior to establishing the connection, disconnect
the power supply and secure it against being
switched back on again.
CAUTION! Danger of material damage!
Dry running can destroy the mechanical seal.
• Before checking the motor's direction of rota-
tion, fill and bleed the pump correctly.
• Never let the pump run dry.
7.2.1 Observe the following prior to connecting
• Observe and comply with all applicable regula-
tions.
• Disconnect the power supply and secure it against
being switched back on again.
• Make sure that the power supply complies with
the data on the data plate. The available electrical
power must be sufficient for the starting current
(6 to 8 times the rated current).
• Keep a suitable 4-core electrical connection line
ready and observe the line diameter:
Anschlussspannung LPC 40
3~230 V 4 x 1,5 mm
3~400 V 4 x 1,5 mm
Installation and operating instructions Wilo-Drain LPC
LPC 50
2 2
4 x 1,5 mm
2 2
4 x 1,5 mm
• Use residual current circuit breakers (max. 30 mA)
to protect the operator.
• Use an automatic circuit breaker for the rated cur-
rent specified on the data plate to protect the
electric motor.
• Provide an all-pole disconnector with a minimum
contact opening width of 3 mm and fusible link.
• Make sure that the electrical connections are pro-
tected from moisture.
7.2.2 Connecting the motor (fig. 2)
• Open the terminal box.
• Connect the motor to the connection line as
shown in fig. 2. Connect the cable ends firmly.
• Earth the motor as required by the regulations.
• Make sure that the cable passage is splash-proof.
• Close the terminal box firmly.
• The motor must be protected against overloading
by a motor protection switch. For a direct start, set
the motor protection switch to the rated motor
current on the motor's data plate.
8 Commissioning
CAUTION! Danger of material damage!
Dry running can destroy the mechanical seal.
• Before commissioning, fill and bleed the pump
correctly.
• Never let the pump run dry.
Filling/bleeding the pump
• Remove the screw plug from the feed/breather
hole (fig. 1, pos. 4).
• Fill the pump with water up to the feed/breather
hole.
• Insert the plug screw in the feed/breather hole.
Checking the motor's direction of rotation
• Switch on the motor briefly and check whether
the motor fan rotates in the direction marked by
an arrow on the pump housing.
• If the motor's direction of rotation is incorrect:
• Disconnect the power supply and secure it
against being switched back on again.
• Exchange the connections of two phases
(fig. 2).
Switching on the pump
• Open all valves in the system.
• Switch on the pump. The suction process can take
between a few seconds and 5 minutes.
English
11