E-Tech EH 3 Manual De Uso página 10

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.
Guidelines
• 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 (EH:
Fig. 5-T; EHsp: fig. 11-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 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 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 EH: Fig. 5-B; EHsp: fig. 11-B)
• Close the delivery valve (EH: see fig. 5-8; EHsp; see fig.11-8) and open the intake valve (EH: see
Fig.5-A; EHsp: see fig.11-A).
• Remove the filling caps (EH: Fig. 5-A1, 5-A2; EHsp: fig. 11-A1, 11-A2).
• Open the inlet gate valve (EH: Fig. 5-4; EHsp: fig. 11-4) to allow the liquid to enter and wait until
the water overflows.
• Close the inlet valve and tighten the caps (see tightening torques in EH: Fig. 6,7; EHsp: fig. 12).
• With liquid level below the pump (negative suction head EH: Fig. 5-A; EHsp: fig. 11-A)
• Close the discharge valve (EH: Fig. 5-8; EHsp: fig. 11-8).
8
HORIZONTAL / SELF-PRIMING MULTI-STAGE PUMPS
• Remove the filling caps (EH: Fig. 5-A1, 5-A2; EHsp: fig. 11-A1, 11-A2).
• 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 EH: Fig. 6, 7; EHsp: fig.12).
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 starting up, check that:
• The electric pump is correctly connected to the power supply,
• The pump is correctly primed (procedure point 6.1)
• The discharge gate valve (EH: Fig. 5-8; EHsp: fig. 11-8) is closed and the inlet valve (EH: Fig. 5-4;
EHsp: fig. 11-4) is open.
• Start the motor and gradually open the valve on the discharge 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. The EHsp versions may require longer to expel the air
from the intake pipe if this is not full.
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: Be careful that the discharged liquid does not damage people or things.
If it is necessary to empty the pump for maintenance or for long downtimes, the procedure is as
follows:
• Close the gate valves of the discharge and inlet piping (EH: Fig. 5-4, 5-8; EHsp: fig. 11-4, 11-8).
• Partially unscrew the discharge cap to release pressure on the pump (EH: Fig. 5-A1; EHsp: 11-A1).
• When there is no more pressure completely remove the inlet and discharge caps (EH: Fig. 5-A3;
EHsp: fig. 11-A3) and wait for pump to empty.
• Once emptying is completed, replace and tighten the caps again, (tightening torques shown in
EH: Fig. 6, 7; EHsp: fig. 12).
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.