Franklin Electric VR Series Operating And Installation page 10

ENGLISH
Translation of the original instructions
WARNING: The installer sees to making the connection in compliance with current standards
in force in the country of installation.
Guide lines
WARNING: The following information is valid for the standard motor supplied with the
pump. If the pump alone is supplied and is coupled with a different 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
motor 60Hz, three phase, 265/460V +/-10
motor 60Hz, three phase, 460V +/-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;
• Consider the power P2 and number of revolutions shown on the pump's data plate and on fig.2 to
choose the correct size of motor.
• 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).
• 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).
8
For versions VR 1/3/5/10:
• 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 VR 15/20/30/45/65/95:
• 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. 21/21-B/22/22-B/23.
7.1 Replacing the motor
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.20). For all other versions, the motor clamping screws
are easily accessible.
For all other versions, the motor clamping screws are easily accessible on the exterior (see fig.19). The motor
shaft must have a key drive.
Note: It is not necessary to carry out any operations on the pump shaft and motor shaft connection joints.
WARNING: Replace the safety casings where necessary; failure to observe these instructions
may cause personal injury.
7.2 Replacing the mechanical seal
The type of mechanical seal can be identified from the pump Identification Code point 4.1 and from fig.14.
For the models with motor power less or equal to 4kW, follow the instructions in fig. 11; for motor power bigger
than 4kW, instructions in fig.12
VERTICAL MULTISTAGE PUMPS