Velda 3000 Mode D'emploi page 16

Attention
Inspect the flex and the electric connecting points prior to use for any damage.
Take care that the plug and the receptacle are dry. For safety reasons any repairs to the
flex and the pump motor may only be carried out by Velda (see guarantee). When in-
stalling the pump outside the pond, inspect all connections for watertightness im-
mediately after putting the pump into use. To obtain watertightness when installing
the pump outside the pond, the Teflon tape supplied along should always be used.
Besides, all connecting pieces should be provided with sealing rings and subsequen-
tly tightened. The sealing rings have a limited lifetime and should be inspected regu-
larly and renewed, if necessary. To prevent overheating of the pumps the diameter of
the hose should be at least 32 mm (when the pump is installed outside the pond).
MAINTENANCE
High-Stream pond pumps are equipped with asynchronous motors. These motors
have a long life-time and low energy use. The motors are entirely closed water-
tight and in principle they are maintenance free. The built-in security device will
switch the motor off in case of overheating. Having cooled down for some time, the
motor will start again. Please remember that, as the occasion arises, the preliminary
filter scale and impeller should be cleaned before putting the pump into use again.
Thermal security device
To prevent overheating and consequently damage to the motor, Velda High-Stream
pumps have a built-in thermal security device. Remember, if the motor is deactivated
by overheating you should check the following points before starting the pump again.
Stop any activities on the pump. Always switch off the power voltage by pulling the
plug out of the receptacle.
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Is the pump sufficiently immersed in the water?
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Is the preliminary filter scale polluted, as a result of which the water supply to the
pump stagnates?
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Is the impeller polluted?
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Are the hose, the hose sockets or the connecting pieces polluted?
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Has the pump cooled down sufficiently before restarting it?
As soon as the above points have been checked and found to be in order, the pump
can be restarted.
Impeller
Not only to remove trouble, but also to be sure of a satisfactory water yield, the
impeller should be cleaned regularly. To this end you should proceed as follows:
!
Deactivate the power supply and remove the pump from the pond.
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Open the preliminary filter scale (click fingers).
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Remove the pump from the preliminary filter scale.
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Turn the 4 screws of the motor case loose.
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Carefully remove the impeller from the motor case.
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Clean all parts under freely running water, using a soft brush.
!
Assemble all parts in reverse order. Take care that the impeller runs smoothly again
in the motor housing and that the rubber ring will be mounted in the right way.