EBARA EVMS 1 Instrucciones Para El Uso página 9

Follow the instructions provided in the following paragraphs.
6.1 INTENDED USES
Refer to PART 2 of the use and maintenance manual
supplied with this manual.
6.2 NON-INTENDED USES
Do not use flammable fluids
Refer to PART 2 of the use and maintenance manual
supplied with this manual.
In particular, do not use the pump to handle flammable liquids.
6.3 ASSEMBLY/DISASSEMBLY
Refer to PART 1 and PART 2 of the use and maintenance
manual supplied with this manual.
6.4 PRECAUTIONS TO AVOID EXCESSIVE
VIBRATIONS
Excessive vibrations can result in excessive wear of the
pump components and/or their premature breaking. To
avoid excessive vibrations:
- always fix the pump to the support surface through the
dedicated holes on the pump body (3SF-3LSF models)
or on the base (3PF-3LPF models).
- Do not operate the pump faster than that indicated on the
plate. Check that the rotation speed indicated on the plate
corresponds to the rated speed of the motor. Make sure
that the motor is never powered at frequencies higher
than 60Hz.
6.5 PRECAUTIONS TO AVOID MISALIGNMENT OF
THE MOVING PARTS
To avoid misalignments of the moving parts during installation
and during the life of the pump, follow the instructions
given in PART 2 of the use and maintenance manual in
the "INSTALLATION" paragraph.
6.6 PRECAUTIONS TO AVOID DRY OPERATION
AND BREAKAGES OF THE MECHANICAL SEAL
It is the responsibility of the user or installer
to ensure that the pump does not run dry.
The level control devices used must comply
with the EN 80079-37 standard.
To avoid possible overheating of the mechanical seal and
consequent breakage, make sure that it is always lubricated
during its operation.
During normal operation, the mechanical seal is lubricated by
the pumped fluid and the heat generated by it is dissipated
by the fluid itself. Therefore, a decrease in the level of the
fluid inside the pump must be avoided and, even more so,
anomalous functioning such as dry running, by applying
safety devices.
These safety devices, in compliance with the essential
requirements of the European Directive 2014/34/EU, must
be covered by a certificate and correctly chosen in the way
of protection against explosion.
For example, devices suitable for this purpose are
manufactured by the company Endress+Hauser.
FIGURES 2 and 3 illustrate how to fit level control devices.
FIGURE 2 shows a sensor of the tuning fork type, while
FIGURE 3 shows a sensor of the conductive type.
To install the level sensor and its control unit, consult the
manufacturer's manual. The control unit must be set so that
the power supply to the pump is automatically suspended
in the event of the absence of fluid. Furthermore, in
accordance with the ATEX regulations, the power supply
must not restart automatically, but a manual verification
and reset intervention are required.
To ensure correct operation of the level control device,
checks must be made at regular intervals. These checks
must be able to detect any sensor malfunctions. Consult
the manufacturer's manual.
In this case, the pump fill actions change as follows.
Proceed as follows:
- Unscrew the hexagonal plug (marked with the letter A), the
connecting elements must be compatible with the fluid.
- The control unit connected to the sensor must indicate
the absence of fluid.
- Using a funnel, fill the pump with process fluid until it
overflows.
- Screw the hexagonal cap A back on until it locks, to
prevent air infiltration.
- Unscrew the hexagonal plug A1 (this plug also has the
function of venting). If it is used to bleed, pay attention
to the outflow of liquids or vapours because the direction
of the jet is lateral to the hexagonal plug.
- Using a funnel, fill with fluid until it overflows (this latter
cap allows filling up to the sensitive part of the sensor).
- Immediately after filling the last section where the sensor
is located with fluid, this must indicate the presence of
the liquid via the control unit.
- Screw the hexagonal cap A1 back on until it locks, to
prevent air infiltration.
- Follow the instructions.
When selecting the level switch, the following technical
data must be considered:
- the temperature range of the fluid to be measured;
- the maximum pressure to which the device is subject;
- the viscosity of the fluid;
- material of the sensor (compatibility with the fluid) and
of the housing;
- ATEX protection class congruent with the ATEX approval
of the pump.
Correct assembly of the fluid monitoring device inside the
pump ensures that the seal is always lubricated by the fluid
itself during its operation.
In these conditions, the tightness is guaranteed for a
continuous operation of 24 hours a day for 6 months.
To replace or check the tightness, the user must contact
the dealer or the after-sales service.
6.7 PUMP OPERATING WITH DELIVERY VALVE
CLOGGED/CLOSED
It is the responsibility of the user or installer
to ensure that the pump does not work with
the delivery valve clogged or closed, or
with a flow rate lower than the minimum
flow rate required to avoid overheating.
The control devices used must comply
with the EN 80079-37 standard.
EN
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