Pump Installation - E-Tech 4 Bedienungs- Und Installationshandbuch

force.
Supply voltage, current and cos φ are quoted on the
motor plate that has to be kept within the electrical panel.
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The motor must be earthed and connected to
the electric panel.
4.2 Verification of Rotation Direction
When the pump has been connected to the power supply,
establish the current direction of rotation as follows:
1. Start the pump and control the head provided with
gate valve not fully closed.
2. Stop the pump and interchange two of the phase
connections.
3. Start the pump and repeat step 1. with the gate valve
in the same position.
4. Stop the pump.
Compare the results obtained after performing steps 1
and 3. The correct connection is the one that gives the
highest head.
Note: The pump must not be started until the suction
support has been completely submerged.

5 . PUMP INSTALLATION

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Before starting any work on the pump or on the
motor, make sure that the power supply has
been disabled and that it cannot be accidentally
switched on.
5 .1 Assembling of the pump with the motor
Place the pump on the motor in order that they are
positioned along the same axis and insert the motor shaft
in the pump shaft joint: the coupling must not be forced.
Tighten the screws or the nuts that diagonally fix the
pump-motor flanges with a driving torque as quoted in
the following table.
3mt
Motor type
Motor 4"
Motor 6"
Motor 8"
5 .2 Delivery piping
If the pump is already coupled to the delivery piping and
you use a chain pipe wrench, tighten the pump, holding it
only by the delivery opening.
The threaded pipes must be connected in such a way as
to support the unscrewing action due to the starting and
stopping of the pump.
The thread of the pipe, which has to be screwed into the
pump, should not be longer than the thread of the pump.
After screwing the pipe into the delivery opening, tighten
the screw assembled to avoid the loosening of the first
section of the pipe, see Fig. 3.
When plastic pipes are used, the pump should be
secured by an unloaded rope to be fastened to the
10
Driving torque
Screw
Nm
M8 18
M12 100
M16 200
delivery opening, see Fig. 3.
5.3 Cable fitting
Use cable clips every 3 meters to fix the cable to the
support rope or to the delivery pipe.
Use plastic cable clips as shown in Fig. 4.
Once the cable has been fastened, cut off the remaining
part of the clip.
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In the case that the tube is plastic, it must leave the
electric cable and the cable support not in tension to
prevent the elongation of the tube, due to the weight of
the water contained in it, tearing the electric cable.
Fig. 3
Fig. 4