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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
"Danger" or "Warning" indicates the risk level deriving from failure to observe
the prescribed safety precautions:
DANGER
Warns that failure to observe the precau-
risk of
tions involves a risk of electric shock
electric shock
DANGER
Warns that failure to observe the precau-
tions involves a risk of damage to persons
and/or things.
WARNING
Warns that failure to observe the precau-
tions involves the risk of damaging the pump
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. Tecnoself are manufac-
tured to include a recirculation system 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 oper-
ated.
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 premature
failure of the pump and voiding of the warranty.
2.- INSTALLATION
2.1 - Fixing
The pump should be installed on a solid, horizontal base, secured
by screws or bolts and using the existing holes in the mount. (2
screws Ø8). 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 unneces-
sary 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
It is recommended to use pipes with a diameter equal or greater
together with one of the following words
than the pump outlet. This will reduce loss of head caused by fric-
tion 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 protec-
tion 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
suction 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 clock-
wise. On three phase pumps the motor may rotate anticlockwise.
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 autho-
rised service agent.
When the pump is eventually disposed of, please note that
it contains no toxic or polluting material. All main compo-
nents are material identified to allow selective disposal.
3
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