Installation - Lowara GHV Serie Montage- Und Betriebsanleitung

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.
The weight of the pipes and tanks increases when they are filled with water.
WARNING
Before starting the set, make sure you have closed and tightened all the unused couplings.
Protection Against Dry Running
The electric panels are ready for connection of a float switch (suitable for open tanks) or a minimum pres-
sure switch on the suction side ( recommended value 0.2 - 0.4 bar). The panels are ready for connection
of three-electrode probes. 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.
WARNING
The sets are supplied with the protection disconnected (factory setting)
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 expres-
sed in liters 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.
Fill the pumps with liquid before starting them. See the pump instructions manual.
WARNING
Follow the start-up procedure described in section 6.
Single-Phase Version
The motor is protected against overload by the converter. If required by local codes, install an additional
protection device. Suitable cable of appropriate gauge must be connected to the panel :
- L1 and N to the input terminals
- PE to the ground terminal marked
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
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