9
•
Should it be necessary to install the pump above the water level, the difference in
height should not be more than 2 metres (see Fig. 4). Ensure that the suction tube is
as short as possible since a long tube increases suction time and facility load loss.
•
It should be ensured that the pump is free from possible flooding and it is given dry
ventilation.
ELECTRICAL UNIT
•
The electrical unit should have a multiple separation system with contact opening of
at least 3 mm.
•
Connection to the mains can only be done using a rigid cable. In the event that a
flexible cable is used this should have terminals to connect it to the pump motor
terminals.
•
A heat protector is incorporated into single-phase pumps. In these, switch installation
is sufficient as in the “Network connection” diagram.
•
In the three-phase motor a motor guard with heat-magnetic protection needs to be
used.
•
A protection differential of 0.03 A is needed for any pump in order to protect from
electrical escapes (shown in diagrams).
