Checking Rotation Direction; Starting Up The Pump; Emptying The Pump - Franklin Electric EM 3 Manuel D'utilisation

ENGLISH
Translation of the original instructions
WARNING:
• The specialist installer must carry out the connection conform to
standards in force in the country of installation.
• Before doing any work on the unit make sure the power supply is
disconnected and that neither the control panel nor the unit can switch
on, not even accidentally.
WARNING:
• Ensure all electrical equipment of the pump, motor and any monitoring
equipment is grounded before connecting the phase conductors.
• The earth conductor must be the last conductor to disconnect from the
terminal.
• Make sure that the earth conductor is longer than the phase conductors
on both ends of the cable.
Guide lines
• Protect electrical conductors from extreme heat, vibration and impact.
The power line must be fitted with:
• a protection circuit.
• As extra protection against lethal electric shocks install a high sensitivity residual
current device, whose operating current differential is less than or equal to 30mA.
• An overvoltage category III all-pole mains isolator in the power supply network as
per current standards.
The electric control panel should:
• Be suited to the rated values of the electric pump, to properly protect the motor.
• Protect the motor from overload and short circuits.
• Protect the motor from overheating (circuit breaker protection);
• Be equipped with a system to protect against dry running, to which should be
connected 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 (Fig. 9-T) and paragraph 4.3.
Before starting up the motor, check that:
• The power cables conform, with 3 conductors (2 + Earth) for the single phase
versions and with 4 conductors (3 + Earth) for the three phase version.
• The power supply is compatible with the motor characteristics.
• Wire the electric cable to the motor according to the diagram shown on the label
inside the cover of the terminal box.
• Check that the earth cable is longer than the phase conductors. If the
powersupply 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 follow these instructions may cause personal injury.
WARNING:
• Avoid any contact between the electric cables and the pipes or other
parts of the pump
• Carefully keep the cables away from damp.
• Tighten the cable glands properly to prevent moisture from entering the
terminal and to ensure protection against sliding of the cables.
The electric motors can run with the voltage shown on the data plate, with a tolerance
of +/- 10%.
The single-phase motors have built-in automatic thermal overload protection.
The three-phase motors have no thermal protection. The installer must install it in the
control panel.
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 place inflammable material near to the pump.
WARNING:
The electric pump must NOT be started without first being filled.
• Its use without liquid may permanently damage the mechanical seal.
• Do not operate the pump with the inlet and discharge valves closed for
more than 5 seconds.
• Do not expose the pump when idle to freezing temperatures. Frozen
liquid will damage the pump.
• The pump should not operate if there is cavitation, because this
damages the internal parts (see point 5.1).
Noise level
All the units generate an acoustic pressure level below LpA 70 dB.
6.1 Priming
With liquid level above the pump (positive suction head Fig. 9-B)
• Close the discharge valve (Fig. 9-8).
• Remove the filling caps (Fig. 2-A1).
• Open the inlet gate valve (Fig. 9-4) to allow the liquid to enter and wait until the
water overflows.
• Close the inlet valve and tighten the caps (see tightening torques in Fig. 2).
10
VERTICAL CLOSE- COUPLE MULTISTAGE PUMPS
With liquid level below the pump (negative suction head Fig. 9-A)
• Close the discharge valve (Fig. 9-8).
• Remove the filling caps (Fig. 2-A1).
• Using a funnel, fill the pump until the water comes out, (this operation may need
to be repeated several times)
• Replace and tighten the caps (see tightening torques in Fig. 2).

6.2 Checking rotation direction

This operation is only required for three-phase motors. For single-phase motors, the
direction of rotation is already set.
• Start up the motor for 1-2 seconds, and check the direction of rotation through the
motor fan cover (no need to remove the cover). The arrow on the fan cover shows
the correct direction.
WARNING: Before any operation on the electric pump, check that the power
supply is disconnected and that it cannot be accidentally reconnected during
maintenance operations.
If the direction is wrong:
• Disconnect the power supply.
• In the terminal box or control panel of the motor, swap the position of two phases
of the power cable.
• Close the lid of the terminal box and/or control panel.
• Check again the direction of rotation.

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 and 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

6.4 Emptying the pump

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.
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.2-A2).
• Completely remove the discharge tap (fig.2-A2) 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.2).
7 RESIDUE RISK ANALISYS
The pump described in this manual has been built according to European Community
safety standards, and totally complies with the Machinery Directive.
The pump has also been designed by taking into account all the risks which workers
may possibly experience and is therefore equipped with all guards positioned in order to
avoid accidents to the operators, however, some residual risks remain, which in normal
conditions cannot cause accidents, but that we wish to point out in any case.
Before any intervention, stop the machine by turning off the main switch and
isolate the machine from the system by closing the upstream and downstream
shut-off valves.
RISK OF ELECTROCUTION
Never remove the terminal cover during machine operation. Before any
intervention, turn off the main electrical switch. If the pump is a single-phase
one, make sure that the capacitor is discharged.
RISK OF EJECTION OF THE FLUID PUMPED BY THE MACHINE
Before start-up, make sure that the connections to the system and the filler
cap and drain plug are tight. The pumped fluid can be under pressure even
when the machine is at a standstill: before any intervention isolate the machine
from the system by closing the upstream and downstream shut-off valves and
partially unscrew the filler cap to reduce the internal pressure. During this phase
there can be a fluid leakage.
RISK OF SCALDING
The outer surface of the motor can be hot during operation. If the pumped
liquid has a higher temperature than the ambient temperature, the pump will
also be at a higher temperature. Use appropriate protective equipment (gloves,
goggles...) and provide for any external protective devices to reduce the risk
of scalding.
RISK DUE TO THE LIQUID'S NATURE
Ascertain the nature of the pumped liquid and use appropriate protective
equipment (gloves, goggles...) when carrying out the start-up, adjustment and
maintenance and disposal operations. Arrange for a containment structure to
prevent any dispersion of the liquid into the environment.
CRUSHING HAZARD
Lifting means suitable for the machine's weight must be used during handling
and installation. To prevent any tipping, the machine must be blocked before
start-up as specified in the instructions.