Lowara GLS Série Instructions Pour L'installation, L'utilisation Et L'entretien page 25

6. Start-up
Use suitable handling equipment. Observe all the accident prevention regulations.
6.1 Water connection
The water connections must be made by qualified installation technicians in compliance with the
regulations in force. In case of connection to the public/private sewer system, the regulations issued by
the competent local authorities (municipal, public utility company, ....) must be observed. Piping must not
force the electric pump.
Do not lift or move the electric pump by the power cable or the delivery pipe.
6.1.1 Checking the oil level
Check the oil level in the mechanical seals chamber.
6.1.2 Checking the rotation of the impeller
Remove the fuses or disconnect the electric pump from the power supply, after that make sure that the impeller rotates freely.
6.1.3 Connections
Refer to the diagrams in section 10.6. Verify the insulation resistance between the phases and the ground is more than 5
MegaOhm (5M ).
6.2 Electrical connection
The electrical connections must be performed by a qualified installation technician in compliance with the
regulations in force. Use suitable handling equipment. Observe all the accident prevention regulations.
Make sure that the supply voltages and frequencies are suited to the characteristics of the electric motor.
WARNING
Refer to the electric pumps' rating plates.
Provide suitable general protection against short circuits on the power line.
Before proceeding, make sure that all the connections (even those that are potential-free) are voltage-
free.
The power supply line must be provided with the following devices (unless otherwise specified by the
local regulations in force):
• A short-circuit protection device
• A high-sensitivity differential device (30mA) providing additional protection against electric shock in
case the grounding system is inefficient.
• A mains isolator switch with a contact gap of at least 3 millimeters.
Ground the system according to the regulations in force. This is the first electrical connection to be
performed. In case people are likely to come in contact with the electric pump or with the pumped liquids,
you must provide a second ground connection.
Protect the electrical conductors from too high temperatures, liquids, vibrations and collisions.
Make sure that the electrical conductors are insulated. Risk of explosion or electric shock if the electrical
connection is not correctly executed or if the product is damaged.
Connect the supply cable and the thermal sensor cable (T1 and T2) to the control panel and verify the correct operation.
Refer to the diagrams in section 10.7.
6.2.1 Overload protection
The user must provide the overload protection (thermal relay or motor protector).
WARNING
Adjust the thermal relay or motor protector to the nominal current value of the electric pump or to the operating current in case
the motor is not used at full load. If the motor has a star-delta starting system, adjust the thermal relay to a value equal to 58%
of the nominal current or operating current.
Refer to section 5.3 for information regarding the electric panel.
6.2.2 Protection against dry running
Refer to sections 5.3 and 5.4.
6.2.3 Direction of rotation
Reverse rotation may cause damage to the motor and the mechanical seal.
WARNING
After making the electrical connection ( section 6.2), check that the direction of rotation is correct, clockwise looking the
electric pump from the top to the bottom (
Do not insert hands, other body parts or tools into the suction port.
At starting stand clear of the electric pump, because the starting jerk can be powerful.
If the rotation direction is incorrect, stop the pump, disconnect the power supply and exchange the position of two phase
conductors in electric panel's terminal board, if the pump is a three-phase model, or check all the connections if the pump is a
single-phase model.
6.3 Operation
Normal operation requires the use of floats to control the starting and stopping of the electric pump.
section 10.8)
en
information for installers
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