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CHECKS ON THE ELECTRICAL SYSTEM
Verify that the electrical system corresponds to the CEI EN 60204-1 standard and to the local and national standards of the electric
system of the place where the pump is installed.
Verify:
- the existence of an earth connection,
- the presence of an omni-polar switch disconnector that can disconnect all the feeding cables to insulate the motor in case of
malfunction or small maintenance operations (the disconnection device from the supply mains must be over-voltage III category)
- the presence of an emergency stop button.
- The presence of a residual current device (RCD) with rated residual operating current not exceeding 0,03 A.
- for three-phase pumps and for pumps without integrated protection device: the presence of a thermal protection device adjusted on
a maximum absorbed current not higher than 5% the current stated in the label and with an operating time lower than 30 seconds.
The feeding cable must have adequate section in order to avoid a voltage drop greater than 3 % of the nominal voltage and to operate
within the rated temperature.
For further limitations, please refer to the motor instruction manual.
ELECTRICAL CONNECTION
WARNING!
Set properly the values of the electrical devices (protections, electronic devices etc…).
6. SETTING AT WORK, OPERATION AND STOP
FILLING AND PRIMING THE PUMP
Priming over head (liquid level on the suction side lower than the pump) (Fig.9a)
i. Close the gate valve on the delivery side
ii. Unscrew the venting cap (Fig.6)
iii. Fill the pump and the suction side
iv. Make sure that all the air is leaked out from the pump.
v. Once the lling is nished, close completely the caps.
Priming under head (liquid level on the suction side higher than the pump) (Fig.9b)
i. Close the gate valve on the delivery side
ii. Unscrew the venting caps (Fig.6)
iii. Open the gate valve on the suction side
iv. Waiting for the exit of the water from the venting caps.
v. Once that the water exits without air presence, close the caps
WARNING!
The priming operation must be repeated in case of long periods of inactivity and whenever necessary.
WARNING!
Check the right setting for auxiliary connection:
• Venting and drain holes must be closed
• In case there are some ushing lines for the seals, they must be open.
6.2 CHECKING OF THE ROTATION WAY
Remove any lifting device before starting the pump.
Verify that the rotation direction of the electric pump corresponds to that indicated by the arrow on the pump body. Rapidly apply and remove voltage
and observe the rotation direction of the motor cooling fan through the holes of fan guard. In the event that the pump is rotating in reverse, reverse two
phases on the terminal board.
WARNING!
The checking of the rotation way must be repeat every time the motor is connected.
Do the starting as shown in the paragraph Starting
6.3 STARTING
Before starting the group be sure that all the prescriptions and the controls described in the previous paragraphs are respected.
WARNING!
In order to avoid serious damages to the components we recommend:
• do not leave the pump run without liquid;
• do not run the pump for a long period with the delivery valve closed;
• do not run the pump in cavitation.
After having done the electrical connection and the priming:
i. Fully open the gate valve in suction.
ii. Keeping the gauge valve closed on the delivery side, feed current, waiting for the pump to reach full operating speed.
iii. Slowly open the valve on the delivery until you achieve the desired ow rate.
- Translation of the original instructions
EN
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