Electrical Connection; Setting At Work, Operation And Stop - SAER Elettropompe L Serie Manual De Empleo Y Mantenimiento

ELECTRICAL CONNECTION

WARNING!
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WARNING!
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. SETTING AT WORK, OPERATION AND STOP

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FILLING AND PRIMING THE PUMP
Priming over head (liquid level on the suction side lower than the pump).
i. Close the gate valve on the delivery side
ii. Open the gate valve on the suction side
iii. Unscrew the venting cap on the pump (Fig. 4) and on the pipes, if present.
iv. Fill the pump and the suction pipe
v. Make sure that all the air is leaked out from the pump and the suction pipe.
vi. Once the filling is finished, close completely the caps.
Priming under head (liquid level on the suction side higher than the pump)
i. Close the gate valve on the delivery side
ii. Unscrew the venting caps (Fig. 4)
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!
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WARNING!
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CHECKING OF THE ROTATION WAY
Remove any lifting device before starting the pump.
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WARNING!
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Do the starting as shown in the paragraph Starting
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STARTING
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In order to avoid serious damages to the components we recommend:
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WARNING!
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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 flow rate.
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Set properly the values of the electrical devices (protections, electronic devices etc...).
For star/delta Y/Δ starting, use a switching time between star and delta less than 3 s.
The priming operation must be repeated in case of long periods of inactivity and whenever necessary.
Check the right setting for auxiliary connection:
Venting and drain holes must be closed
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.
The checking of the rotation way must be repeat every time the motor is connected.
Rinse the pump after installation and before operating it with the same fluid to be pumped into operation.
Repeat this operation for ordinary or extraordinary maintenance, which involves extracting the pump from
its seat.
Before starting the group be sure that all the prescriptions and the controls described in the previous
paragraphs are respected.
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.
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