BEDU A Series, Operating Instructions Manual, Page: 6 / 14

GB
6.4.4. Alignment of pump-motor unit AS
The pump-motor units positioned on a baseplate and
with a flexible coupling are aligned before leaving the
factory.
The pump and motor assembly can lose alignment
during shipping. Final alignment must be accomplished
in the field.
After installation is completed with tightening
of anchor bolts and connection of pipes,
alignment of the coupling must be double-
checked before starting the pump.
If necessary, the unit must be re-aligned.
Remove the coupling guard and with a dial indicator
or thickness gauge, make sure the distance (3-4 mm)
between the halfcouplings is the same along the entire
periphery.
With a dial indicator or straight edge, check the alignment
(coaxiality) of the external part of the halfcouplings.
Control procedure must be performed at 4 diametrically
opposed, equidistant points on the periphery.
After alignment procedure, before starting
the pump attach the coupling guard (safety
protection against accidental contact).
6.5. Electrical connection
OFF
Electrical connection must be carried out only by
a qualified electrician in accordance with local
regulations.
Follow all safety standards.
The unit must be properly earthed (grounded).
Connect the earthing (grounding) conductor to the
terminal with the marking.
Compare the frequency and mains voltage with the
name-plate data and connect the supply conductors
to the terminals in accordance with the appropriate
diagram inside the terminal box cover.
ATTENTION: never allow washers or other
metal parts to fall into the internal cable
opening between the terminal box and
stator. If this occurs, dismantle the motor to
recover the object which has fallen inside.
If the terminal box is provided with an inlet gland, use
a flexible power supply cord of the H07 RN-Ftype with
section of cable not less than 11 TAB IEC 60335-1.
If the terminal box is provided with an inlet bushing,
connect the power supply cord through a conduit.
For use in swimming pools (not when persons are in
the pool), garden ponds and similar places, a residual
current device with IΔN not exceeding 30 mA must be
installed in the supply circuit.
Install a device for disconnection from the mains
(switch) with a contact separation of at least 3 mm in
all poles.
With a three-phase motor install an overload protection
device with curve D appropriate for the rated current of
the pump.
Single-phase AM, are supplied with a capacitor
connected to the terminals and (for 220-240 V - 50 Hz)
with an incorporated thermal protector.
7. STARTUP AND OPERATION
7.1. Preliminary checks before start-up of the
pump
Do not start-up the device in case of damaged parts.
7.2. First starting
OFF
ATTENTION: never run the pump dry. Start the pump
after filling it completely with liquid.
When the pump is located above the water level
(suction lift operation) or with a positive suction head
which is too low (less than 1 m) to open the non-return
valve, fill the pump through the priming hole (par. 12.3
fig. 2).
When the liquid level on the suction side is above
the pump (inflow under positive suction head), fill the
pump by opening the suction gate valve slowly and
completely, keeping the delivery gate valve open to
release the air.
Before starting, check that the shaft turns by hand. For
this purpose use the screwdriver notch on the shaft end
on the ventilation side.
When starting, with a three-phase motor, check that
the direction of rotation is as shown by the arrows on
the lantern bracket: clockwise when viewing the motor
from the fan end.
Otherwise, disconnect electrical power and reverse the
connections of two phases.
7.3. Self-priming
(Capability to clear the air in the suction pipe when
starting with the pump located above the water level
and when the suction pipe cannot be filled manually, as
in the case of a missing foot valve).
The A, AS pumps reprime themselves without the
necessity of mounting a foot valve up to a depth of 7 m
(6 m for A 40-110).
Conditions for self-priming:
- pump casing filled with water up to suction port level
before starting (capacity 2 litres for A 40-110, 3 litres
for A 50-125 and 5.5 litres for A 65-150, 8 litres for A
80-170);
- allow 0,5 m minimum of straight vertical pipe above
the discharge port;
- suction and discharge valves completely opened;
- suction pipe with the connections perfectly airtight and
properly immersed in the water to be lifted;
- mechanical seal perfectly airtight (not damaged).
The pump series A 40 and A 80 are equipped with an air
release plug (14.04).
To get a complete filling of the pumpcasing, remove the
plug and make the filling until water will comes out from
this hole.
Close properly the plug before starting the pump.
For the self-priming times see the data sheet.