Emptying The Pump - SeaLand MVX serie Betriebs- Und Installationshandbuch

ENGLISH
Translation of the original
instructions
motor, please refer to the relative use and maintenance manual. Protect the
electric connections from excessively high temperatures, vibrations and
shocks.
The power line must be equipped with:
• A short circuit protection device,
• A residual current device less or equal to 30mA,
• An overvoltage category III all-pole mains isolator in the power supply network
according to current standards.
The electric control panel should:
• Be suited to the rated values of the electric pump, to properly protect the motor.
• Protect from motor from overheating (circuit breaker protection);
• Be equipped with a system to protect against dry running, which should be
connected to the pressure switch, level sensors, floats and other suitable devices.
An inflow pressure switch is recommended if the pump is connected to the water
supply or level sensors/floats if the pump draws from a tank.
WARNING: The data regarding the power supply of the motor are shown on
the plate of the same. For more information about the use and maintenance of
the motor, refer to the "Service instructions" manual.
Before starting up the motor, check that the electrical supply is compatible with the
characteristics of the same. Wire the electric cable to the motor according to the
diagram shown inside the cover of the terminal box. Check that the earth cable is
longer than the phase connections: If the power supply cables are pulled and detached
from their cable stay, the last one that should disconnect is the earth cable. Make the
connection ensuring there is an effective earth circuit.
WARNING: Once the cables have been connected, replace the terminal
board cover; failure to observe these instructions may cause personal injury.
WARNING: Avoid any contact between the electric cables and the pipes or
other parts of the pump, carefully insulate cables from damp.
If necessary, the motor maybe rotated on its axis to facilitate accessibility for
maintenance personnel. For all versions of the pump with motor of rated power less
or equal to 4kW, first remove the coupling safety casings to access the motor
clamping screws (see fig.17). For all other versions, the motor clamping screws are
easily accessible. In this case, it will be necessary to unscrew the clamping screws of
the motor on the pump, turn the motor in its place and fix the screws again (fig.18).
WARNING: Having turned the motor and fixed the clamping screws, replace
the safety casings where necessary; failure to observe these instructions may
cause personal injury.
Electric motors can generally run with a power voltage having a tolerance of:
motor 50Hz, single phase, 230V +/-10
motor 50Hz, three phase, 230/400V +/-10
motor 50Hz, three phase, 400/690V +/-10
motor 60Hz, three phase, 220/380V +/-10
Use standard power cables with 3 connections (2 + Earth) for the single phase versions
and with 4 connections (3 + Earth) for the three phase versions.
5.4.3 Pumps without standard motor
• Use only dynamically balanced motors (IEC 60034-14) and with normal vibration
grade (A),
• Use only single or three phase motors whose size and power are in compliance with
European standards, with IP55 protection rating and insulation class F or higher;
• Please refer to power P2, to the number of revolutions indicated on the data plate
and to table 2 for choosing the correct motor size.
• Check that the coupling surface is flat and even and that the screws are fixed and
the alignment exact,
• Before starting up the motor, turn the rotor by hand and check for any sounds of
abrasions and/or friction,
• The motor must be equipped with keyed joint,
• For use and connections, refer to the relative "Installations Instructions" manual.
6 START-UP
WARNING: Pay attention to discharged liquid so that it cannot cause damage
to people or things. The motor protectors can cause an unexpected restart of
the motor, which may cause serious personal injury. Never start up the pump
without the coupling safety casings correctly installed.
WARNING: During operation the external surfaces of the pump and the motor
could exceed 40°C (104°F) if the pumped liquid is not at ambient temperature.
Do not touch the unit without proper protection. Do not put combustible
material near the pump.
WARNING: The electric pump must NOT be started without prior filling. Its dry
use may irreparably damage the mechanical seal.
6.1 Priming
Case with liquid level above the pump (positive suction head fig.9-B)
• Close the delivery valve (fig.9-8).
• Partially unscrew the pin on the filling cap (fig.16-A-1 o fig.16-B-1).
34
VERTICAL MULTI-STAGE PUMPS
• Open the inflow gate valve (fig.9-4) to allow the liquid to enter; wait until the water
comes out of the side hole of the cap.
• Tighten the pin of the filling cap.
Case with the liquid level below the pump (negative suction head fig.9-A)
• Close the delivery valve (fig.9-8).
For versions MVX 3/5/10:
• Completely remove the filling cap (fig.16-A-2) and partially unscrew the discharge
cap by 3-4 turns (fig.16-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 MVX 15/30/45/65:
• Completely remove both filling caps (fig.16-B-4, 16-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 accidently 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 (procedure point 6.1),
• The gate valve (fig.9-8) is closed and the inlet valve (fig.9-4) 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 Point 9
Noise level
For information on noise levels for the pump supplied with standard IEC motor see
table (fig.15).

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.9-8 and 9-4)
• Discharge the pressure of the pump;
• Partially unscrew the pin on the filling cap (fig.16-A-1, 16-B-1).
• Completely remove the discharge tap (fig.16-A-3, 16-B-3) and wait for the pump to
empty;
• Once emptying is completed, replace and tighten the discharge cap again, the pin
of the filling cap (tightening torques shown in fig.16).
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.
7 MAINTENANCE AND SUPPORT
WARNING: Before any repairs to the electric pump, check that the power
supply is disconnected and that it cannot be accidently reconnected during
maintenance operations.
WARNING: If the electric pump is used for hot and/or hazardous liquids,
inform the personnel who will carry out the repair. In this case, clean the pump
so as to guarantee the safety of the operator.
WARNING: Repairing or having the electric pump repaired by personnel not
authorised by the manufacturing company means losing the warranty and
operating with unsafe and potentially hazardous equipment.
WARNING: Pay attention to discharged liquid so that it cannot cause damage
to people or things.
The electric pump does not require any ordinary scheduled maintenance. If the user
wishes to prepare a scheduled maintenance plan, bear in mind that the due dates
depend on the type of liquid pumped and the running conditions.
For the spare parts and the maintenance instructions, please contact our sales&service dpt.
Spare parts see fig. 21/22/23