5
The suction pipe must be at least the same diameter
as the pump suction port. If the suction pipe exceeds
10 metres, the total friction losses in the pipe must
be taken into consideration.
The pump is self-priming down to 2 metres, provided
that the pump has been filled with water.
Install the pipes so that air locks are avoided, espe-
cially on the suction side of the pump.
Correct pipework is shown in fig. 1.
Fig. 1
The pipes should be fitted so that any tension
caused by variations in temperature does not affect
the pump.
If the pumps are installed in long pipes, these should
be adequately supported before and after the pump.
If a hose is used for suction pipe, it must be of a non-
collapsible type.
The suction pipe/hose must be as short as possible
to ensure optimum operating conditions.
Isolating valves should be fitted on either side of the
pump.
Note: The pump is not allowed to run against a
closed discharge valve as this will cause an increase
in temperature/formation of steam in the pump which
may cause damage to the pump.
If there is any danger of the pump running against a
closed discharge valve, a minimum liquid flow
through the pump should be ensured by connecting
a bypass/a drain to the discharge pipe.
To minimize possible noise from the pump, it is ad-
visable to fit anti-vibration mountings on either side
of the pump and between foundation and pump.
The pump should be sited in a well-ventilated but
frost-free position, preferably in a closed room. If the
pump is sited outside, it must be protected from the
elements by means of a suitable cover.
5. Electrical connection
The electrical connections should be carried out by
an authorized electrician in accordance with local
regulations.
The operating voltage and frequency are marked on
the pump nameplate. Make sure that the motor is
suitable for the electricity supply on which it will be
used.
The electric motor must be connected to the supply
as shown in the diagram on the inside of the terminal
box cover and in accordance with local regulations.
Use an approved watertight screwed cable entry
when connecting the cable to the terminal box.
5.1 Motor protection
All single-phase versions incorporate motor protec-
tion and require no additional motor protection.
Note: If the motor is overloaded, it will stop automat-
ically. When it has cooled to normal temperature, it
will restart automatically.
The three-phase versions must be connected to an
external motor protection.
The pump must be earthed and the electric installa-
tion must be fitted with an earth leakage circuit
breaker (ELCB).
6. Start-up
Note: Do not start the pump until it has been filled
with water and vented.
The pump has been correctly filled with water when
the water level is just below the transparent cover.
Arrows on the fan cover show the direction of rota-
tion.
To create the maximum suction capacity, when the
pump is first started or after service, close the dis-
charge valve (immediately after the pump), start the
pump and slowly open the discharge valve.
If the pump is not operating satisfactorily after maxi-
mum 5 minutes, stop the pump and check the water
level in the suction pipe and the pump.
Plastic pipes and connections must be
tightened carefully.
According to the IEC publication No. 364,
the pump must be installed at least 2 me-
tres from the edge of the swimming pool.
TM
00
22
63
01
95
Before removing the terminal box cover
and before any removal/dismantling of the
pump, make sure that the electricity supply
has been switched off.
The pump must be connected to an exter-
nal mains switch.
