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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.
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 Paragraph 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).
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
delivery mouth of the electropump. (Fig.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
CAUTION! ALWAYS FOLLOW THE SAFETY REGULATIONS!
8.1.
The electrical installation must be carried out by a skilled electrician who assumes all
the responsibilities.
8.2.
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.
8.3.
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.
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