SAER Elettropompe MK Serie Manuel D'utilisation page 24

CHECKS ON THE ELECTRICAL SYSTEM
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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. 6) 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. 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!
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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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Verify that the electrical system corresponds to the IEC 60204-1 standard and to the local and national
standards.
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.
- 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.
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.
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EN - Translation of the original instructions
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