Pre-Start Checks - Lowara ResiBoost MMW Manuel D'installation Et D'entretien

Display for Display for
MMW and MMA and MTA
MTW
WARNING:
If the system is connected to an aque-
duct, check that the sum of the pressure
of the aqueduct and the maximum pres-
sure of the pump does not exceed the
value of the maximum permitted operat-
ing pressure (nominal pressure PN) of
the pump or of the converter of the MTW
or MMW.
7.2 Tank pressure
After setting the required operating pressure of the
system, modify the precharge pressure of the dia-
phragm tanks. The pre-charge value of the dia-
phragm tank can be calculated with this formula:
bar
operating pressure (SET
POINT) — 0.6 = pre-
charge pressure
See Pressure tank installation
information.

7.3 Pre-start checks

Make sure that the following are completed before
you start the pump system powered and controlled
by the converter:
• Mechanical installation
• Hydraulic installation
• Electrical installation
• Check the pre-charge pressure of the tank
• Program the converter
NOTICE:
Do not run the system dry. Start the pump only after
filling it completely with liquid.
7.4 Prime the pump
• Prime the pump using the priming cap on the in-
take pipe (when applicable) or following the in-
structions in the manual provided with the pump.
7.4.1 Negative suction head pumps
Description
ped after the
delay time (dL
parameter).
This function
prevents dry
running.
The EL function
(EXT.LOW WA-
TER) and the
MP function
(MIN.PRESS)
can both be en-
abled.
kPa
operating pressure (SET
POINT) — 60 = pre-
charge pressure
on page 29 for more
• Fill the intake pipe by pouring water into the pri-
ming hole in the intake pipe of the pump.
• Fill the pump bodies at the caps near the delivery
flange. Refer to the pump manual.
7.4.2 Positive suction head pumps
• Open the check valve installed on the intake
duct.
• When there is sufficient head, the water over-
comes the resistance of the non-return valve in-
stalled on the pump's intake line and fills the
pump bodies.
• If this does not occur, prime the pump at the caps
near the delivery flange. Refer to the pump man-
ual.
NOTICE:
Never run the pumps for more than 5 minutes with
the delivery gate closed.
7.5 Start the pump
• The pump is at a standstill and the LEDs (9) and
(10) are off when the converter is turned on.
• Press (2) to enter AUTOMATIC mode.
• The pump starts up and the LEDs (9) and (10)
are illuminated if the pressure of the system is
below the SET POINT value.
• For MTW and MTA models, check the direction
of rotation of the motor.
• After a few seconds, providing the pump is
primed correctly, the pressure of the system
shown on the display starts to increase and, with
all the utilities closed, the pump stops.
• If instead the pressure remains steady at 0.0 bar
after a few seconds of operation, with the utilities
closed, press (2) and stop the pump. The pump
has not been primed correctly and is running dry.
• Reprime the pump and repeat the start-up proc-
ess.
7.6 Change the direction of rotation
If using an MTW or MTA converter, change the di-
rection of rotation of the three-phase motor as fol-
lows:
1. Enter MANUAL mode, press (2), and the LEDs
(9) and (10) are off.
2. Press (3) for a few seconds and access the BA-
SIC menu (MB). The LED (10) flashes.
3. Press (6) to select rS (MTW) or ROTATION
(MTA).
4. Press (5) to select rotation.
5. Press (6) to confirm and press this several
times to exit the menu, or press (3) with the
LED (10) off.
6. Enter AUTOMATIC mode, press (2), and the
LED (10) is illuminated and steady.
7.7 Calibrate the operating pressure
The converter system is calibrated at the factory for
use. Modify the pressure value in relation to the ac-
tual needs of the system as follows:
• Increase/decrease the value of the pressure SET
POINT.
Check that the system is pressurized and that none
of the utilities are open and the pump is at standstill.
en - Original instructions
43