Xylem Lowara ResiBoost MMA Series, Installation, Operation And Maintenance Manual, Page: 31 / 244

For models MMA and
MTA, see Figure 10 and
Figure 15 .
1. Unfasten the 8
screws and open the
FRONT cable mak-
ing sure not to dam-
age the connecting
cable of the display
and the connector.
2. Insert the cable of
the pressure sensor
in the relative cable
gland, see Figure 15
if the cable is miss-
ing or needs to be
replaced.
3. 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,
see Figure 15 . Suit-
able cable 2 x (0.75
to 1.5) mm
2
. Check
that all the cables
are secured, includ-
ing the connecting
cable of the display,
and close the
FRONT cover and
fasten the 8 screws.
4.4.3 Analogue pressure sensor
An analogue sensor with 4-20mA output is required
to monitor the pressure in the system constantly.
Converter models MMA and MTA require an external
sensor. See Figure 15 for connections. A 2–meter
power cable and a 0-16bar sensor are provided as
standard.
The pressure sensor for models MMW and MTW is
inside the converter.
Be sure the following are adhered to:
• Use cables resistant to heat up to +70°C (158°F)
for all the connections.
• The wires that are connected to the power termi-
nals, the pressure sensor (MMA, MTA), and the
contact for protection against dry running must
be separate and have reinforced insulation.
• Be careful not to drop bits of wire or sheathing or
other foreign materials into the converter when
making the electrical connections. Take all due
care to avoid damaging the internal parts when
removing anything inside.
4.4.4 Applications with very long cables
If the cable between the converter and the motor is
more than 30 meters in length, it is ADVISABLE to
install a dV/dt or sinusoidal filter.
The filters extend the life-span of the insulation and
reduce the noise of the motor.
Inductance on the side of the motor (dV/dt filter) re-
duces the dv/dt at the rising edge and the phases,
leveling the waveform of the current.
The sinusoidal filter makes both the waveform of the
current and the waveform of the voltage at the out-
put of the frequency converters sinusoidal.
Be sure that the following are adhered to:
• Refer to figures Figure 16 and Figure 18 .
• Install the filter between the converter and the
motor.
• Install the filter as near as possible to the output
of the converter, at a max distance of L1max.
• IP64 grade filters can be installed outdoors but it
is advisable to ensure protection against direct
sunlight.
• Refer to Table 17 and Table 19 for the maximum
lengths of the power cable of the H07RNF motor.
5 System Description
5.1 User interface
The list describes the parts in Figure 1 and Figure
2 .
Num-
ber
Description
1 Button for running the electric pump in
MANUAL mode. Press and hold the but-
ton to run the electric pump.
2 Button for switching between AUTOMAT-
IC and MANUAL mode.
3 Button for accessing the MENU BASE
(MB) parameters in MANUAL mode, BA-
SIC MENU (MB) parameters .
4 and 5 Buttons for:
• Decreasing or increasing the value of a
parameter selected in MANUAL mode.
• Viewing the operating parameters in
AUTOMATIC mode, Operating param-
eters .
6 Button for selecting parameters in AUTO-
MATIC mode. In MANUAL mode, this is
an alarm reset button.
7 Steady green LED, indicating the power is
on and the converter is running.
8 Steady red LED, indicating a fault. The
LED is illuminated when there is an alarm.
9 Steady yellow LED, indicating the pump is
running.
10 Green LED:
• Illuminated and steady in automatic
mode.
• Flashing in manual parameter configu-
ration mode (basic menu, advanced
menu)
11 Type of display:
• Two digit LEDs, models MMW and
MTW
• LCD with 2 lines of 8 characters, mod-
els MMA and MTA
5.1.1 Locking/unlocking the user interface
en - Original instructions
31