ENGLISH
15
7.4 Working conditions of the PULSAR DRY
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Water temperature: from 0°C to + 40°C.
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The electropump cannot operate when dry.
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Install in vertical position.
•
If installed in a pit, the pit must be free from frost.
7.5 Hydraulic connection PULSAR
–
PULSAR DRY
•
The hydraulic connection of the electropump can be carried out with iron or rigid plastic parts.
•
Avoid any kind of choking of the output pipe.
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It is advisable to use pipes with an internal diameter at least equal to that of the delivery pipe, so as to avoid a fall in the performance
of the pump and the possibility of clogging.
•
For the version with a float switch, ensure that the latter can move freely (see Paragr
aph 9.3. “REGULATING THE FLOAT SWITCH” ).
The size of the pit must always be calculated in relation to the quantity of incoming water and to the flow rate of the pump so as not so
subject the motor to an excessive number of starts.
•
To lower the pump, always use a rope or chain fixed beforehand to the hook on top of the pump. (Fig.1, pag. 1).
Never use the power
cable to lift the electropump.
•
When using in a well, it is recommended to secure the power cable to the delivery pipe with hose clamps, every two/three metres.
Install a non return valve on the delivery pipe at a distance of at least 2 mt from the delivery mouth of the electropump.
(Fig.1, pag. 1)
The length of the power cable on the electropump limits the maximum depth of immersion at which the pump may be
used.
Dry operation of the pump causes irreparable damage to the mechanical seal.
8.
ELECTRICAL CONNECTION
Ensure that the mains voltage is the same as that shown on the plate of the motor to be fed and that there is the possibility of
MAKING A GOOD EARTH CONNECTION.
•
Both the single-phase and the three-phase version of the electropump are supplied with an electric cable. If the power cable is
damaged in any way it must be
replaced
and not
repaired
.
•
It is advisable to reserve an electric power line exclusively for the pump connection.
•
Upstream from the pump, fit a suitably sensitive magnetothermal differential switch.
•
Switch off the power upstream from the system before making the electrical connection.
•
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 requiring any
manual intervention.
•
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.
•
Connect the cable of the pump to the electric panel, ensuring that the following parts correspond:
•
Before making a test start, check the level of the water in the well.
9.
CHECKING THE DIRECTION OF ROTATION (for three-phase motors)
The direction of rotation must be checked each time a new installation is made.
Proceed as follows (Fig.3):
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 is the one that gives the
higher flow rate.
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 above. The direction of rotation is correct, that is
clockwise, if the protection cap moves as in the drawing (anti-
clockwise).
