GB
A,AS Rev13 - Operating Instructions
Page 11 / 64
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-F
type.
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 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
over 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.
7.4. Gate valve regulation
With the gate valve completely open or with an
outlet pressure lower than the minimum pressure
shown on the name-plate, the pump may be noisy.
To reduce noise regulate the delivery gate valve.
A,AS Rev13.indd 11
11/06/15 10:49
