Xylem Lowara ResiBoost MMW Series Installation, Operation And Maintenance Manual page 30

en - Original instructions
technicians and in compliance with
the regulations in force.
• Before starting work on the unit,
make sure that the unit and the con-
trol panel are isolated from the power
supply and cannot be energized.
Grounding (earthing)
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
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
minimum characteristics of the H07RNF cables in
relation to the model of the converter and the length
of the cable. Maximum cross-section 4mm
lyzed.
Install or replace the power
cables
For models MMW and
MTW, see Figure 10 ,
Figure 11 , and Figure
12 .
For models MMA and
MTA, see Figure 10 ,
Figure 13 , and Figure
14 .
30
Table 31 . Install
and Table 19 for the
2
ana-
1. Unfasten the 4
screws and open the
REAR cover.
2. Insert the power ca-
bles in the relative
cable glands. Figure
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 , and
Figure 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-
WARNING:
• The power cable of the motor must
NEVER be laid parallel to the power
cable of the converter, see
• 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
Figure 14
4.4.2 I/O connections
For models MMW and
MTW, see Figure 10 and
Figure 12 .
ing sure not to dam-
age the connecting
cable of the display
and the connector.
Figure 15
2. Insert the power ca-
bles in the relative
cable glands. Figure
13 , and Figure 14
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
, Figure 13 , and
.
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 .
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.
.
.