Xylem GLS GLV - Manual (Page 24)

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Do not lift the electric pump by the motor cable.
When you receive the electric pump, check the outside of the package for evident signs of damage. Check the product for
damages and for missing components. If the product bears visible signs of damage or there are missing parts, notify our
distributor within 8 days from the delivery date.
4.3 Disposal of Packing Materials
I you cannot utilize the packing materials for other purposes, dispose of it according to the sorted waste disposal regulations
locally in force.
5. Installation information for installers
The installation operations must be carried out by qualified and experienced personnel.
Use suitable equipment and protections. Observe the accident prevention regulations in force.
Before installing the electric pump, verify that the cable and the cable gland have not been damaged
during transportation. In case it’s necessary to use fixing elements, check that they are correctly
dimensioned, they are not corroded and they are tightened at the correct torque.
In case of installation in a lifting station, install a ventilation piping.
There are special requirements to be respected in case of installation in explosive atmospheres.
Check that the piping to which the electric pump is connected do not force the electric pump.
Always refer to the local and/or national regulations, legislation and codes in force relating to the selection of the installation site
and the water and power connections.
5.1 Positioning
The most common positioning methods use the lowering device for fixed installation (installation type P), or the stand for
movable or semi-fixed installation (liquid transfer, draining of flooded excavations) (installation type S).
Make sure that no obstructions or obstacles prevent adequate submersion and ventilation for proper motor cooling. Make sure
there is adequate clearance around the pump for the maintenance operations.
Carefully observe the diagrams provided in section 10.6.
5.1.1 Anchoring (for version with lowering device for fixed installation)
Anchor the coupling foot of the lowering device securely to a concrete foundation using suitable bolts.
Please contact our Sales and Service Department if you need information regarding their number and size (diameter).
5.2 Selecting the delivery pipe and check valve
Use pipes suited to the maximum working pressure and flow rate of the pump.
Install a non-return valve in the pipe that connects to the public/private sewer. This will prevent the backflow of the liquid. If you
select a ball valve, check whether it is “sinking ball” (heavy) type or “floating ball” (lightweight) type, as the installation and
operating conditions change. Do not place the valve too close to the electric pump, as the flowing liquid moved by the pump
must be able to open the valve’s shutter (in any case, refer to the manufacturer’s instructions). Consider the flow resistance of
the pipes and check valve, if present. Always refer to the local and/or national codes, regulations and standards in force.
5.3 Selecting the electric control panel
The motors must be suitably protected against overload and short circuits.
Make sure that the panel’s electric ratings match those of the electric pump. Improper combinations may
cause problems and fail to guarantee the protection of the electric motor.
Do not install the control panel in an explosive atmosphere or in a well.
If you use thermal relays, we recommend those that are sensitive to phase failure.
The electric pumps are equipped as standard with a thermal sensor (normally closed) placed in the
motor. The thermal contacts open at 125°C.
This sensor must be powered by the electrical panel with a voltage not exceeding 250 V and a current
not exceeding 4 A. It is recommended to connect the sensor with a voltage of 24 V. The sensor, when
connected to a relay or contactor, makes it possible to stop the electric pump when the motor overheats
(probe open).
Avoid the possibility of dry running, i.e. the pump must not run without water inside it. Make sure that the
electric panel is equipped with a dry running protection system to which floats must be connected.
For the single-phase versions, make sure that the electric control panel is equipped with the run and start capacitors.
As an additional safety degree, use additional control systems, like level and temperature sensors.
5.4 Selecting the float/s
Depending on the type of installation, the nature of the liquid and the national/local codes and regulations, you can select
between float switches with electromechanical control and those with multiple contacts.
Make sure that the characteristics of the float switch match those of the electric panel. Improper
combinations may cause malfunctions.
Always refer to the local and/or national codes, regulations and standards in force.
WARNING
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