Automatic Operation With Float; Electric Connections; Wiring Diagrams; Electric Diagrams - DRENO V2 Série Manuel D'utilisation Et D'entretien

8.3 Automatic operation with float
The automatic operation of the pump is ensured by the float connected to the electric panel.
The float connected to the appropriate control panel must have sufficient space to be able to lift freely. In the
delivery piping, the installation of a ball valve is recommended, to prevent backflow.
Dreno Pompe only authorises the use of floats approved by itself, as per the references shown in the current
catalogue and price list. Dreno Pompe shall reject all responsibility in case of use of floats other than those
indicated in its catalogue. When using other types of floats, the installer should contact the technical office of
Dreno Pompe for the required authorisation.
Otherwise, Dreno Pompe shall not be held responsible for faulty operation. To ensure correct installation refer
to the technical data sheet of the product, which is supplied by Dreno Pompe separately.
If ATEX, the float must be interfaced with a barrier consisting of an ATEX intrinsic safety active electric
construction.
The installation must only be carried out by specialist personnel, or personnel qualified by Dreno Pompe.
WARNING: only use ATEX components authorised by Dreno Pompe.
WARNING: the ATEX float switch always must be interfaced with an intrinsic safety

9. Electric connections

All the electric connections must be completed by specialised electricians, possibly by personnel qualified
by DRENO POMPE.
The power network frequency and voltage must comply with the requirements shown on the pump plate.
To access the connection area, unscrew the cable gland screwed in the motor casing. However, this opera-
tion must only be carried out by personnel qualified by DRENO POMPE. In case of ATEX pump, it will cause
the loss of the ATEX characteristics.
• For the external electric connections, the personnel in charge can use the diagrams that follow.
• In three-phase motors, check the direction of rotation of the impeller (see the direction of rotation section).
• In case of doubts on the causes of the faulty operation of the pump, disconnect the power supply and
contact DRENO POMPE qualified personnel.
• If the power supply cable is damaged, it must be replaced by the manufacturer, its technical support service,
or by qualified personnel, in order to avoid any risks.
All the electric connections must be protected by humidity, and all joints must be fully resistant to penetration
in case of immersion, and guarantee the IP68 characteristics of the pump itself.

9.1 Electric diagrams

barrier.
WARNING: Before opening the electric pump, always disconnect the
electric power supply.
1~ 230 V - 50 Hz
L 1
L 2
Condensatore
Capacitor
Condenseur
Condensador
Kondensator
Nero/Black/Noir/Negro/Schwarz
Nero/Black/Noir/Negro/Schwarz
Nero/Black/Noir/Negro/Schwarz
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U1
V1
W1
S
PE