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I N S T R U C T I O N M A N U A L
Safety precautions
This symbol
words "Danger" or "Warning" indicates the risk level deriving from
failure to observe the prescribed safety precautions:
DANGER
Warns that failure to observe the pre-
risk of
cautions involves a risk of electric
electric shock
shock.
DANGER
Warns that failure to observe the pre-
cautions involves a risk of damage to
persons and/or things.
WARNING
Warns that failure to observe the pre-
cautions involves the risk of damaging
the pum and/or the plant.
1. General Information
Please observe the following instructions to achieve the best
pump performance possible and a trouble free installation.
These are self-priming horizontal multistage centrifugal
pumps having more than one impeller assembled in-line. The
same flow passes through each impeller but the pressure
increases each time, i.e. more impellers, more pressure.
These pumps are manufactured to include a recirculation sys-
tem with automatic valve achieving suction lifts of up to nine
meters. By using a foot valve on the suction pipe the pump will
rapidly self-prime when operated.
These pumps are designed to operate with clean water, free
from particles in suspension and with a maximum temperature
of 35 degrees centigrade.
Correct pump operation is assured providing the instruc-
tions on electrical connection, installation and use are
strictly adhered to.
Failure to adhere to the instructions can result in prema-
ture failure of the pump and voiding of the warranty.
2. INSTALLATION
2.1. Fixing
The pump should be installed on a solid, horizontal base, secu-
red by screws or bolts and using the existing holes in the
mount. (Use the required number of 8 mm or 10 mm
bolts/screws depending on the pump model). Ensure that the
pump mount rests squarely on the base before fixing.
2.2. Suction pipe assembly
The suction pipe, if longer than 7 meters, must be of the same
or greater diameter than the pump inlet and installed in an
upward inclination to prevent trapped air pockets forming.
If the pump is required to perform a suction lift, to avoid unne-
cessary losses of head on the discharge side, the pump should
be installed as close as possible to the water.
The end of the suction pipe must always remain at least 30 cm
below the water level.
2.3. Discharge pipe assembly
together with one of the following
It is recommended to use pipes with a diameter equal or grea-
ter than the pump outlet. This will reduce loss of head caused
by friction in longer pipe runs.
Pipework must be supported and not rest on the pump.
If a foot valve has not been installed it is recommended to fit a
check valve to prevent accidental draining down of the system.
2.4. Electrical connection
The electrical installation must have a multi pole isolator
with minimum ≥ 3 mm contact openings protected by a
30 ma. residual current detector (earth leakage trip).
Single phase motors have built-in thermal protection.
On three phase motors the installation of a thermal pro-
tection system is the responsibility of the end user.
Follow instructions given on fig.1 for correct electrical
connection.
2.5. Pre-start checks
Ensure the voltage and frequency of the supply correspond
to the values indicated on the electrical data label.
Ensure that the pump shaft is rotating freely.
Fill the pump body with water through the self priming plug
opening. If a foot valve has been installed, also fill the suc-
tion pipe.
Check all joints and connections for leaks.
THIS PUMP MUST NEVER BE DRY RUN.
3. STARTING
Ensure all valves in the pipework are open.
Connect power supply. There will be a delay before water
appears at the end of the discharge pipe.
Viewing from the fan ensure that the rotation of the motor is
clockwise. On three phase pumps the motor may rotate anti-
clockwise. If this is happening the flow will be lower than
expected. To rectify this situation the two supply phases need
to be reversed.
Ensure that the absorbed current is the same or lower than the
maximum shown on the electrical data label. Adjust the thermal
relay to suit when using three phase models.
If the pump fails to operate refer to the possible faults, causes
and solutions list for assistance.
4. MAINTENANCE
Under normal conditions these pumps require no special
or planned maintenance.
If the pump is not to be operated for a long period it is
recommended to remove it from the installation, drain
down and store in a dry, well ventilated place.
ATTENTION: In the event of faults or damage occurring
to the pump, repairs should only be carried out by an
authorised service agent.
When the pump is eventually disposed of, please note
that it contains no toxic or polluting material. All main
components are material identified to allow selective
disposal.
3
GB
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