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IMMP1.1W – IMMP1.5W – IMMP1.5W-BC – IMTP1.5W – IMTP1.5W-BC – ITTP1.5W-BC - ENG
ELECTROIL
Before reopening of the inverter box to possible change cable or other components, after
functioning, remove voltage and wait at least two minutes, then you can open the box (danger:
contact with electric high voltage parts).
The unit is equipped with all those technical arrangements required to ensure a good functioning
under normal situations installation.
The control system has a entry-filter, also have a current overload protection which guarantees absolute protection
when the Inverter is combined with motors that not exceed the maximum power.
For EMC is good that the power wires of control panel and motor power wires (when the motor are separated
from the inverter) are shielded type (or armoured) with individual conductors of appropriate section (current density
<= 5 A/mm2). These cables must be the minimum length necessary. The screen conductor must be connected
to the ground by both sides. On motor use the metal case for connection to the ground of the screen.
To avoid loops that can create mass disturbances radiated (antenna effect), the motor operated by the frequency
converter must be connected on the ground individually, always with a low-impedance using the metallic box of
the machine.
The wires from power supply to frequency converter and wires from frequency converter – motor (if the motor is
separated to the Inverter) must be spaced as much as possible, not to create loops, not make them run parallel
less than 50 cm.
Don’t observe these conditions could cancel completely or partially the effect of the filter integrated.
4.5 Access to the electronic board
In case is necessary to change damaged cables, pressure transducer or to add the float switch contact, you need
to open the Inverter case.
The operations of a component for the inverter must be performed only by experienced personnel
qualified by the manufacturer, using only original spare parts supplied by the manufacturer.
Any action with open box of the Inverter must be made after at least 2 minutes after open line
with appropriate switch or the physical separation from the power supply cable;
In case of failure to one of the cables or the pressure transducer, for the replacement of that
should be opened by unscrewing the inverter cover the N° 12 screws in the back on the heat
sink. For the extraction of a cable, unscrew the three screws that close the cable triangular plate. Remember to
always replace the O-ring seal on the cable under the plate. To connect the cables in the appropriate terminals
follow the pattern of connections in the electronic board below (fig. 14-15):
•Single-phase Inverter power supply cable for IMMP1.1W, IMMP1.5W, IMMP1.5W-BC, IMTP1.5W,
IMTP1.5W-BC: contact 220Vac + GND (J4, fig.14);
•Three-phase Inverter power supply cable for ITTP1.5W-BC: contact L1, L2, L3 + GND (J7, fig. 15);
•Single-phase Motor power supply cable on IMMP1.1W-1.5W-1.5W-BC: contact S, T (J3, fig.14);
•Three-phase Motor power supply cable on IMTP1.5W – 1.5W-BC: contact R, S,T (J3, fig.14);
•Three-phase Motor power supply cable on ITTP1.5W-BC: contact U, V,W (J9, fig.15);
•Pressure transducer with 4-20 mA output: contact +15V, S (J5, fig.14 and 15);
•Float switch: contact ENABLE, 0V (J5, fig.14 and 15);
•Motor ON output signal: Contact MOTOR ON, 0V (J5, fig.14 and 15 - closed when the motor is ON, max.
30V, 3mA)
4.6 Connecting the float contact or other NC contact
To connect an enable Normally Closed contact use the poles 2 (Enable) and 5 (common) of J5 (fig. 14, 15). When
the contact open, the Inverter stop the pump; when the contact close, the pump may re-start at previous working
condition.
For the connection of the float switch contact, you need to change the three poles cable of the sensor with a four
poles cable, passing on the same central exit of the transducer cable.
The new connections of pressure transducer and float switch contact must be done out of the
Inverter box, protecting them to humidity, water and dust. Do not practice others holes to the
Inverter case to avoid damages or decrease of the protection and insulation grade and
interruption in anticipation of the guarantee.
