General Safety Warnings; Technical Construction Characteristics - EBARA GP Operating And Maintenance Manual

 disassembly or repair operations were performed by
operators not authorised by EBARA Pumps Europe
S.p.A.;
 faulty operation derives from the incorrect installation
and/or electrical connection, tampering, improper use or
use beyond the limits indicated in this manual;
 corrosive liquids, sandy water, chemically or physically
aggressive liquids were pumped without prior verification
and authorisation by EBARA Pumps Europe S.p.A.;
 if alleged defects were reported more than two months
after discovery;
 the alleged defect depends on normal wear following use.
The following parts, which are normally subject to wear, are
covered by a limited warranty: bearings, mechanical seal, seal
rings, condensers, adjustable pressure switch. For the
warranty covering the various components, refer also to the
relative documents (electric pump, electric panel/control
device/protection panel).
For technical support operations on the set, refer to the
MAINTENANCE chapter.
4.

GENERAL SAFETY WARNINGS

Before starting up the product, it is very important for the user
to know how perform all the operations as described in this
manual and in the other manuals listed in the INTRODUCTION
chapter.
4.1. PREVENTIVE MEASURES BY THE USER
Installation,
(mechanical and electric) must be performed by
ATTENTION specialised and qualified personnel (refer to the
definition
INTRODUCTION chapter).
It is prohibited to tamper with, alter or modify
the set, even partially.
It is prohibited to use the set in conditions or for
purposes other than those indicated in this
manual.
The instructions located on the set that identify
hazardous zones and operations must not be
removed, covered or damaged.
Strictly comply with the accident prevention
regulations in force in the respective countries
of installation. Also carefully observe the
regulations regarding the personal protective
equipment necessary for the various operations
on the set, referred to in this manual and in the
attached
components.
Before handling, servicing or repairing the set
or any of its parts, disconnect the electrical
power supply in order to prevent its accidental
start-up which could injure personnel and/or
cause property damage.
Every maintenance, installation or handling
operation performed on the set or any of its
parts with the electrical system energised could
cause serious accidents, also fatal.
Before starting the system, check that all the
electric devices and components, including the
cables, are correct.
Do not start up the set with bare feet or, even
worse, when standing in water or with wet
hands.
maintenance and
of qualified personnel
documents relative to
4.2. PROTECTIONS AND SIGNIFICANT PRECAUTIONS
4.3. RESIDUAL RISKS
repairs
in the
5. TECHNICAL CONSTRUCTION
CHARACTERISTICS
5.1. DESCRIPTION
Pressure booster sets are automatic systems for supplying
water to 1 or more pumps in parallel, for connection to
diaphragm pressure vessels, to tanks with an air cushion, or to
a normal water mains. They are used whenever it is necessary
to increase pressure or it is necessary to keep a water mains
pressurised. Drawing water from the connected system, when
the set
the pumps are stopped, causes the pressure to decrease and
the resulting start of the first pump (or pilot pump for the
GPJ/GPEJ sets). If the pressure drop continues or restoring is
not sufficient, the second pump will start, and so on if the set
has a second, third and fourth pump (main pumps for the
GPJ/GPEJ sets). The restoration of the pressure in the system
causes the staggered stopping of the pumps. An electronic
device activates the automatic rotation of the starting order of
the electric pumps so as to ensure uniform distribution of the
starting operations, and therefore of the working hours (in sets
with more than one pump).
The standard pressure booster sets are divided into:
 GP: sets that operate with fixed speed pumps;
 GPE: sets that operate with variable speed pumps;
 GPJ/GPEJ: sets that operate with fixed (GPJ) or variable
(GPEJ) speed pumps. These differ from the GP/GPE sets
due to the presence of a pilot pump that starts as the first
ENGLISH
The device is not intended to be used by
people (children included)
physical, sensory or mental capabilities, or lack
of experience and knowledge unless they have
been given instruction concerning the safe use
of the equipment and have been made aware
of the hazards connected with it by a person
responsible for their safety, or if they use it
under his or her supervision. Children must not
play with the device.
All of the set components have been designed
such that the moving parts have been made
harmless through the
casings. The manufacturer declines all liability
if damaged is caused as a result of tampering
with these devices. Do not repair and/or adjust
mechanical components while the machine is
operating.
Each conductor or energised part is electrically
isolated from the ground; there is however a
supplementary safety mechanism
which the conductive parts are connected to an
earth conductor to ensure that accessible parts
do not become hazardous if the
insulation is damaged.
While maintenance is being performed, there is
the risk of working on moving parts while the
set is operating. Make sure to disconnect the
electrical power supply before performing any
work.
While maintenance is being performed, there is
the risk of working on live parts while the set is
operating. Make sure to disconnect the
electrical power supply before performing any
work.
with reduced
use of protective
through
main
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