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remains inside the pump, to do this, you need to rotate the shaft by hand.
EN
5. Check the direction of rotation of the motor, as shown below:
- Close the delivery and suction valves.
- Switch on the motor for 1 or 2 seconds, then stop it.
- Visually check that the direction of rotation is correct via the connection or the fan
on the motor. The direction of rotation is indicated by an arrow on the pump body.
Generally, it is clockwise (to the right) when the observer is facing the fan on the
motor.
- After removing the coupling guard, put it back immediately after checking the
rotation.
7.2 STARTING THE PUMP
1. Shut off the main delivery valve. Open the suction valve if it is closed.
2. Turn on and off the switch to start the motor once or twice, to ensure that there are
no faults in the start up.
3. When the rotation speed remains stable at the nominal speed, gradually open the
delivery valve.
4. Check that there are no significant variations in the pump pressure and in the current
absorbed by the motor. Check that there are no significant vibrations and/or unusual
noises (5) Follow the same procedure during subsequent start ups if the operating
conditions are normal, observing the instructions in Chapter 8. Maintenance.
7.3 STOPPING THE PUMP
Before stopping the pump you are advised to close the delivery valve gradually.
If the pump stops due to a sudden lack in the power supply, disconnect the motor
switch. This will avoid the pump starting up again as soon as the power supply returns,
thereby endangering staff.
7.4 ADJUSTING THE GASKET (ONLY PUMPS WITH SOFT SHAFT SEAL)
If the pumps have soft shaft seals, make sure there is a moderate flow of water, as
shown in the following table:
Internal diameter of the
gasket (mm)
14
Initial operation (ml/min) Normal operation (ml/min)
33
43
53
60
70
80
Instruction and Maintenance Manual
70
86
106
120
140
160
33
43
53
60
70
80
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