Installation - Xylem LOWARA GVA Manual De Instalación Y Operación

INFORMATION FOR INSTALLERS
4.

Installation

Use suitable equipment to handle the set, avoid impacts, do not use the eyebolts on the motor for lifting
purposes. Before installing the set, make sure it did not suffer any damage during transportation. Install
the pressure booster set in a well-ventilated room, allowing adequate clearance (0.5 m) on all sides and
front for maintenance. The tanks can be mounted on the set or floor. Place the set on a level and sturdy
surface.
Piping
The pipes connected to the set must be adequately sized (if possible, according to manifold diameter). To
prevent undue stress, expansion joints and suitable pipe supports should be provided. You can use either
end of the manifold, but don't forget to plug the unused end.
ATTENTION
Protection Against Dry Running
The electric panels are ready for connection of a float switch (suitable for open tanks) or a minimum
pressure switch on the suction side (recommended value 0.2 - 0.4 bar).
Refer to the panel wiring diagram for the connections.
The triggering of the protection device can be delayed by making suitable adjustments on the converter.
When the minimum pressure conditions are restored, the pumps start up automatically.
ATTENTION
Tank Selection
Variable speed pressure booster sets can operate with smaller tanks compared to traditional systems. As
a general rule, a tank with a capacity in litres amounting to about 10% of the flow rate of a single pump
expressed in litres per minute is sufficient. The required water volume may be distributed among multiple
tanks.
Electrical Connections
The electrical connections must be made by a qualified electrician in accordance with local
codes.
Before making the connections, disconnect the power supply!
The wiring diagram and the labels on the panel provide the necessary information for connection and the
required power supply values.
ATTENTION
Three-Phase Version
The motor is protected against overload by the converter. Suitable cable of appropriate gauge must be
connected to the panel:
- L1, L2, L3 to the main switch terminals
- PE to the ground terminal marked
The weight of the pipes and tanks increases when they are filled with water.
Before starting the set, make sure you have closed and tightened all the unused
couplings.
The sets are supplied with the protection disconnected (factory setting)
Do not start the pumps until they have been filled with liquid. See the pump
instructions manual. Follow the start-up procedure described in section 6.
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