Checking Rotation Direction; Starting Up The Pump; Emptying The Pump - FPS VR Serie Manuel D'installation Et D'utilisation

Case with the liquid level below the pump (negative suction head Fig. 6-A)
• Close the delivery valve (Fig. 6-8).
For versions VR 3/5/9:
• Completely remove the filling cap (Fig. 14-A-2) and partially unscrew the discharge cap by 3-4 turns
(Fig. 14-A-3)
• Using a funnel, fill the pump until the water comes out, (this operation may need to be repeated several times)
• Replace and tighten the discharge cap and the filling cap (see tightening torques in the figure)
For versions VR 15/20/30/45/65/95:
• Completely remove both filling caps (Fig.14-B-4, 14-B-2)
• Using a funnel in one of the two holes, fill the pump until the water comes out (this operation may need to be
repeated several times)
• Replace and tighten both filling caps (see tightening torques in the figure)

6.2 Checking Rotation Direction

Check the direction of rotation by looking at the arrows on the jacket label, or the arrow on the motor bracket. Start
up the motor for 1-2 seconds, and check the direction of rotation through the motor fan cover.
WARNING: Before any repairs to the electric pump, check that the power supply is disconnected and that
it cannot be accidentally reconnected during maintenance operations.
If the direction is incorrect (procedure valid only for three-phase motors):
• Disconnect the power supply
• In the terminal box or control panel of the motor, exchange the position of two phases of the power cable
• Close the lid of the terminal box and/or control panel again
• Check the direction of rotation again
Note: For single-phase motors, the direction of rotation is already set.

6.3 Starting Up the Pump

Before start up, check that:
• The electric pump is correctly connected to the power supply
• The pump is correctly primed (Section 6.1)
• The gate valve (Fig. 6-8) is closed and the inlet valve (Fig. 6-4) is open
• Start the motor
• Gradually open the valve on the delivery side of the pump
• After a few seconds of noisy operation to expel any air, the pump should function silently and regularly without
any changes in pressure
Otherwise refer to the Troubleshooting Table in Fig. 19.

6.4 Emptying the Pump

If it is necessary to empty the pump for maintenance or for long periods of inactivity, please:
• Close the gate valves of the delivery and suction piping (Fig. 6-8 and 6-4)
• Discharge the pressure of the pump
• Partially unscrew the pin on the filling cap (Fig. 14-A-1, 14-B-1)
• Completely remove the discharge tap (Fig. 14-A-3, 14-B-3) and wait for the pump to empty
• Once emptying is complete, replace and tighten the discharge cap and the pin of the filling cap (tightening
torques shown in Fig.14).
WARNING: Liquid may remain in some parts inside the pump. To remove all liquid, the pump must be
completely disassembled.
WARNING: Pay attention to discharged liquid so that it cannot cause damage to people or things.
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