Electrical Connection; Starting The System - EBARA 1GP Operating And Maintenance Manual

 If the set arrives with the intake manifold disassembled,
make the connection using a pipe union ("f").
 Connect the set's intake ("a") and delivery ("b") lines to
the system. The unit is supplied with threaded flanges or
flanged connections and with closing caps/flanges for the
manifold side not used for the connection. The dimension
of the connection pipes must be equal to or greater than
the set's intake and delivery manifolds; they must be as
short and straight as possible, and with a path that always
ascends towards the pumps (intake), using as few elbows
as possible, avoiding minimum number of elbows,
avoiding goosenecks that could cause siphons or air
pockets. Please note that in sets with 1 pump, the
manifold is not present and the connection is made
directly to the intake ("a") and delivery ("b") lines of the
single pump.
 All the threaded or flanged connections must be well
sealed to prevent air infiltration.
 Supports, anchors, unions, pipes and other system
components must be independent of the set to prevent
creating additional loads or stress. If there are support
brackets ("e") on the manifold, use them to fasten the
manifold to a structure in order to reduce the load on the
pumps.
 It
is recommended
immediately downstream of the set.
 To avoid transmitting vibrations to the system pipes, it is
recommended to install antivibration joints on the set's
intake and delivery lines.
 Always install a foot valve when installing above-head.
 In order to test the set, install a union tee downstream of it
with an isolating valve and the relative recirculation pipe
connected to the intake tank or towards the discharge.
8.3. CONNECTION TO PRESSURE TANKS (see the
attached drawings fig. D)
It is possible to assemble diaphragm tanks with a capacity of
up to 24 litres on the delivery manifold, depending on the
number of pumps. It is recommended to only install tanks type-
approved according to Directive 2014/68/EU. They must only
be installed on specific G 1 pipe sections ("c"). If using larger
sized diaphragm pressure tanks (precharged or supplied by a
compressor), the connection must be made to the end of the
delivery manifold not used for the connection to the system (for
sets with more than 1 pump). For air cushion type pressure
tanks, the automatic supply must be connected with the G 1/2
intake located on the pump intake line ("d"), which is only
present in sets with an EP electrical panel. In any case, refer to
the tank's instruction manual.
8.4. PRIMING (see the attached diagrams fig. E)
 Set with positive head (priming tank with a level
higher than the pump intake opening): open the set's
intake isolating valves ("i"), and close the delivery
isolating valves ("h"), remove the filling cap located on the
top of the pumps ("g") (see the manual for the specific
pump for additional information) and wait until water exits.
If there is no leakage (e.g. horizontal priming) from the
stop valve, fill through the pump filling hole until it
overflows, then reclose using the relative cap.
 Set with negative head. (priming tank with a level
lower than the pump intake opening): open the set's
intake isolating valves ("i"), remove the filling cap from the
pumps ("g") and fill until it overflows. Then reclose using
the relative cap.
9.

ELECTRICAL CONNECTION

to install an isolating
ATTENTION The
valve
The sets can be equipped with electrical panels and single-
phase or three-phase control devices with a thermoplastic or
metal enclosure, depending on the size, the cable gland
output, and the different degree of protection depending on the
control device. The electrical components that protect the
auxiliaries operate with very low voltage, are easy to replace
and find commercially.
For connecting the set to the electrical mains, refer to the
attached manuals and the instructions provided on the control
panel (sets with EP/EP-E/SP-EFC/SP-MFC control system) or
on the protection panel (sets with E-drive, E-SPD control
system).
For the set's wiring diagram for connecting the electric pumps
to the panel or the control device, refer to the ATTACHED
DIAGRAMS chapter (fig. G).
For the characteristics and wiring diagram for the panel/control
device, see the attached manual for the electrical panel or
control device provided with the set.
For the electrical characteristics of the panel/control device,
see the attached manual for the electric pumps.
If connecting pressure switches and transducers, see the
information provided on the devices themselves.
For further information, or if there are questions concerning the
correct connection, contact the closest authorised reseller or
service centre, specifying the data identifying the set located
on the DATA PLATE.
Note: for sets with a three-phase connection, after making the
connection to the terminal board, immediately check the
rotation direction of the motor cooling fan, which must be
compatible with the instructions provided on the fan cover and
in the pump manual. If the rotation is incorrect, completely
disconnect the voltage from the panel and invert the
connection of two of the three phases on the board, then check
again. For sets with an inverter on the motor, use the keypad
to invert the rotation direction.

10. STARTING THE SYSTEM

For the first start-up of the set, follow the described procedure
(see the attached diagrams fig. F):
ENGLISH
electrical connection
performed by specialised and qualified
personnel (refer to the definition of
qualified personnel
INTRODUCTION chapter).
The set power supply must be supplied
by means of a permanent connection to
the system's electrical
connection must include a switch, fuses
and a thermal circuit-breaker adjusted to
the current absorbed by the set. Make
sure that the characteristics of the
electrical panel are compatible with
those of the set. Use connection cables
with a section suitable for set absorption
(refer to the attached electrical panel
manual for technical absorption data).
Check that the mains to which the set is
being connected has
earthing system according
electrical regulations applicable in the
country. Perform the
connection before performing any other
work on the panel.
must be
in the
panel. The
a functional
to the
earthing
6