Electrical Connections; Wiring Scheme - DRENO Compatta PRO Manuel D'utilisation Et D'entretien

The automatic pump mode is guaranteed by a float connected to the control box.
The float connected to the dedicated control box must have sufficient space to rise freely. It is advisable to
install a ball check valve in the supply piping to prevent any reflow.
Dreno Pompe only authorises the use of the certified floats, as per the references contained in the catalogue
and current price list. Dreno Pompe does not authorise the use of any floats different to those shown in its
catalogue. For the use of different floats, the installer must contact the Technical Department at Dreno Pompe
to obtain the necessary authorisation. Failure to comply with this requirement, Dreno Pompe cannot accept
responsibility for operating anomalies.
For correct installation refer to the product technical sheet, supplied separately by Dreno Pompe. If the float
is ATEX, it must be interfaced with an active electric ATEX intrinsic safety barrier. Only to be installed by spe-
cialised or qualified Dreno Pompe engineers.
WARNING: only use ATEX components authorised by Dreno Pompe.
WARNING: The ATEX float must be interfaced with an active electric intrinsic

8 . Electrical connections

All electrical connections should be carried out by qualified electricians, if it is possible by qualified DRENO
POMPE personnel.
The frequency and the voltage should be complied with ones indicated on the pump plate.
To access the connection area, unscrew the cable gland screwed in the motor support; however this opera-
tion should only be carried out by qualified DRENO POMPE Engineers failing which the pump will lose its
ATEX characteristics.
• For external electrical connections, assigned personnel should use the following diagrams.
• In three-phase motors, check the rotation direction of the impeller (see rotation direction paragraph).
• In the case of doubt regarding the cause of poor pump operation, it is necessary to disconnect the electri-
cal supply and contact qualified DRENO POMPE personnel.
All electrical connections should be protected against humidity and all junctions must be fully waterproof and
guarantee the IP 68 characteristics of the pump itself.

8 .1 Wiring scheme

For single-phase motors 230 V - 50 Hz
LINE 1
LINE 2
CAPACITOR
safety barrier almost certificated Exdb IIB Gb.
WARNING: the electric power supply should be interrupted before ope-
ning the electropump.
Black Black (Common)
Brown Black (Main)
Black (Start)
Yellow Green
For three-phase motors 230/400 V - 50 Hz
U1 V1 W1
1 2 3
M
3∑ ˜
- 30
T1 T2
4 5