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Electrical Hazard:
• Always connect the external protec-
tion conductor to ground (earth) ter-
minal before making other electrical
connections.
4.4.1 Power supply connection
WARNING:
Always turn off the power supply and
wait a minimum of 2 minutes before
making any connections.
The converter comes with a mains power cable and
a motor power cable. Some models have a power
supply cable with mains plug. See
290. Install the pump making sure that the plug and
socket can be easy to access for deactivating the
converter + pump system.
If the power cable of the motor needs to be re-
placed, fit a new one of a cross-section suited to the
maximum current consumption of the electric motor
and taking into account also the maximum voltage
drop (≤4%). Refer to
Table 17
ble 19
on page 280 for the minimum characteristics
of the H07RNF cables in relation to the model of the
converter and the length of the cable. Maximum
cross-section 4 mm² analyzed.
Install or replace the power cables
For models MMW and
MTW, see
Figure 10
on
page 272,
Figure 11
on
page 273, and
Figure 12
on page 274.
For models MMA and
MTA, see
Figure 10
on
page 272,
Figure 13
on
page 275, and
Figure 14
on page 276.
Table 31
on page
on page 278 and
Ta-
1. Depending on the
model, unscrew the
screws and open the
REAR (4 screws) or
FRONT cover (6
screws).
2. Insert the power ca-
bles in the relative
cable glands.
Figure
on page 273
11
3. First connect the
ground cable to the
relative terminal and
then the other ca-
bles. It is good prac-
tice for the ground
cable to be longer
than the other ca-
bles,
Figure 11
on
page 273, and
Figure
on page 274
12
4. Check that all the ca-
bles are secured,
close the REAR cov-
er and fasten the
screws.
1. Unfasten the 8
screws and open the
FRONT cover mak-
ing sure not to dam-
age the connecting
cable of the display
and the connector.
Figure 15
on page
277
2. Insert the power ca-
bles in the relative
WARNING:
• The power cable of the motor must
NEVER be laid parallel to the power
cable of the converter, see
on page 272.
• Models MTW and MTA: although the
converter has a single-phase power
supply, the pump motor always has a
three-phase power supply at 230 V.
The missing phases are created by
the converter. For additional informa-
tion, see
Figure 11
ure 13
on page 275, and
on page 276.
4.4.2 I/O connections
For models MMW and
MTW, see
on
Figure 10
page 272 and
Figure 12
on page 274.
For models MMA and
MTA, see
Figure 10
on
en - Original instructions
cable glands.
Figure
13
on page 275, and
Figure 14
on page
276.
3. First connect the
ground cable to the
relative terminal and
then the other ca-
bles. It is good prac-
tice for the ground
cable to be longer
than the other ca-
bles.
4. Check that all the ca-
bles are secured, in-
cluding the connect-
ing cable of the dis-
play, and close the
FRONT cover and
fasten the screws.
Figure 9
on page 273,
Fig-
Figure 14
1. Unfasten the 6
screws and open the
FRONT cover.
2. If required, connect
the cable of the level
sensor to the digital
input to prevent dry
running of the pump.
The electrical con-
tact must be normal-
ly open when an
alarm is triggered.
Suitable cable 2 x
2
(0.75 to 1.5) mm
.
3. Insert the cable in
the cable gland in
the cover, see
Figure
12
on page 274.
4. Check that all the ca-
bles are secure and
close the FRONT
cover, making sure
not to crush the ca-
bles between the
cover and the con-
verter. Unfasten the
6 screws.
1. Unfasten the 8
screws and open the
31
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