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

Each air supply unit must be connected to only
one pump; there must be no connection
between the two air supply units in the case of
a pressurization unit; there must be no non-
return valves on the supply manifold of the unit
and the pressurized autoclave tank, nor on the
outlets of the individual pumps. Only those on
the suction side.
The automatic air feeder is suitable for systems
ATTENTION where regular operation of the pumps is
required, because it uses the start-ups to
perform its function.
Its correct operation is guaranteed when there
is a negative suction head of the pump; in the
case of a positive head it is advisable that this
does not exceed 5 m ca.
However, it cannot be used in combination with
submersible pumps where it is not physically
possible to connect it to the pump suction.
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

ATTENTION The electrical connection must be performed by
specialised and qualified personnel (refer to the
definition
INTRODUCTION chapter).
The set power supply must be supplied by
means of a permanent connection to the
system's electrical panel. The 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 a functional earthing system
according
applicable in the country. Perform the earthing
connection before performing any other work
on the panel.
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
of qualified personnel
to the electrical regulations
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 VASCO, 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):
 make sure that the set is full of water;
 open the pump intake ("i") and delivery ("h") isolating
valves;
 close the valve downstream of the system;
in the
 provide voltage to the electrical panel or the protection
panel ("m");
For versions with the EP/EP-E/SP-EFC/SP-MFC control panel
 start the first pump in the set manually. For the procedure
to follow, see the attached manual for the electrical panel.
After checking that it starts, stop the pump manually;
 manually start the other pumps in the set one at a time (if
present). For the procedure to follow, see the attached
manual for the electrical panel. After checking that each
single pump starts, stop each manually before proceeding
with the next one;
 switch the set's operating mode to "automatic". For the
procedure to follow, see the attached manual for the
electrical panel;
 slowly open the isolating valve downstream of the system.
the unit will activate automatically. Check the activation of
the pumps, when starting and stopping, manoeuvring the
downstream valve; if the pressure switches need
adjusting, proceed as indicated in the MAINTENANCE
AND REPAIR chapter.
For versions with an VASCO/E-SPD+ control device
 slowly open the isolating valve downstream of the system.
the set will activate automatically. Check the operation of
ENGLISH
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