ENGLISH
20
3.
When the pump is to be in a fixed installation, with a float, a check valve must always be fitted in
the delivery pipe. This is also advisable on pumps with manual operation.
ELECTRIC CONNECTION
CAUTION! ALWAYS FOLLOW THE SAFETY REGULATIONS.
1.
Ensure that the mains voltage is the same as the value shown on the motor plate and
that there is the possibility of
MAKING A GOOD EARTH CONNECTION.
2.
Pumping stations must always be provided with an automatic switch with an
intervention current of less than 30 mA.
3.
Single-phase motors are provided with built-in thermal overload protection and may
be connected directly to the mains.
N.B.
If the motor is overloaded it stops
automatically.
Once it has cooled down it starts again automatically without any
need for manual intervention.
4.
Three-phase pumps must be protected with motor protectors suitably calibrated
according to the values on the data plate of the pump to be installed. The plug on the
pump must be connected to an EEC socket complete with isolating switch and fuses.
5.
Do not damage or cut the power cable. If this should occur accidentally, have it
repaired or replaced by skilled and qualified personnel.
CHECKING THE DIRECTION OF ROTATION (for three-phase motors)
(Fig.4)
The direction of rotation must be checked each time a new
installation is made.
Proceed as follows
(Fig.4)
:
1.
Place the pump on a flat surface.
2.
Start the pump and stop it immediately.
3.
Carefully observe the kick-back on starting, looking at the
pump from the motor side. The direction of rotation is
correct, that is clockwise, if the protection cap moves as in
the drawing (anti-clockwise).
If it is not possible to check as described above because the pump is already installed, check as
follows:
1.
Start the pump and observe the water flow rate.
2.
Stop the pump, switch off the power and invert two phases on the supply line.
3.
Restart the pump and check the water flow rate again.
4.
Stop the pump.
The correct direction of rotation will be the one in which the flow rate
and electric absorption are LOWER!
STARTING UP
Models with a float switch start up automatically when the water level rises; models without a float
are started by means of a switch located upstream from the socket (not supplied).
ADJUSTING THE FLOAT SWITCH
Lengthening or shortening the cable between the float and the fixed point (slot provided in the
handle -
Fig.5
) adjusts the START or STOP level of the pump. Be sure that the float can move
freely.
