Electrical Connection - SAER Elettropompe TM Serie Manual De Empleo Y Mantenimiento

5.4

Electrical connection

The electropumps are not provided with an electrical panel. The user is responsible for realizing and installing it in
observance of the CEI EN 60204-1 standard.
After having verified the data indicated on the plate, proceed to connect the electricity to the motor terminals in
observance of the diagrams in fig.5 or in the terminal board, according to the voltage and number of phases of the
power supply.
Fit the earth connection.
In the case of a three-phase power supply, verify that the rotation direction of the electropump 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.
Perform this operation with the pump full of liquid.
6. Setting at work, operation and stop
6.1 Preliminary verifications
Complete the checks listed in the previous paragraphs before starting up the unit, and also make sure that:
– The pump has been completely filled up with liquid;
– The system has been fitted with all the necessary hydraulic, electrical and mechanical protection devices and that
these have been correctly adjusted;
– The direction of rotation is correct;
– All connections are watertight.
6.2 Commissioning
For installations under water head, close the valve on the delivery pipe.
– Prime the pump by filling it with water through the loading plughole located on the upper part of the pump body.
Within filling, unscrew all the plugs (37 – fig.6) located at the top in order to release the air, and fill the pump
up completely.
– For installations under water head, fill the pump by opening the shutter in the intake pipe and that of the delivery
to release the air.
– Close the shutter on the delivery.
– Feed current, waiting for the pump to reach full operating speed.
– Slowly open the valve on the delivery until you achieve the desired flow rate.
– In the event that you observe small leaks, it is a good idea to wait until it reaches full operating speed and temperature
to see if they stop.
6.3 Checks while running
After a sufficient period of time to reach normal operating conditions, verify that:
– There are no liquid leaks.
– There are no vibrations or anomalous noises.
– There are no oscillations of the flow rate.
– The ambient temperature does not exceed 40 °C.
– The temperature of the pump body does not exceed 120 °C.
– The motor's current absorption does not exceed that shown on the plate.
In the presence of even only one of these conditions, stop the pump and find the cause.
Stuffing box packing: tighten the packing gland after 4/5 hours of operation. After the tightening the gland, the amount
of leaking liquid should be a slight dripping and, at any rate, must be less than prior to this operation.
Mechanical seal: the mechanical seal does not require any adjustment and/or maintenance. Liquid may leak at the
beginning of operation due to the bedding-in of the seal itself. Should the leakage fail to cease, stop the unit and
identify the cause.
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ELETTROPOMPE
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