DGFLOW DGFIT T/T 06 Manual De Uso Y Mantenimiento página 43

Operation
4
SWITCH OFF THE
SLAVE UNIT
5
ADDRESS THE
INVERTER
MASTER
6 PUMP ROTATION CHECK
(surface pumps)
6a PUMP ROTATION CHECK
(submersible pumps)
7
SETTING THE
PRESSURE
SENSOR RANGE
8
SETTING THE
OFF FREQUENCY
(switch off
frequency)
9
DRY RUNNING PROTECTION
THROUGH PARAMETER COSPHI
10
SETTING THE
MINIMUM
WORKING
PRESSURE
11
SWITCH OFF THE
MASTER UNIT
12
CONNECTION OF
THE INVERTERS
13
PUMP UNIT
STARTUP AND
CHECKS
Switch off power to the inverter SLAVE
Turn on the drive that works as MASTER and set the parameter W in the
menu ADV as W = MS (master)
Set the parameter SS in ADV menu to the full scale value of the pressure
sensor (default 10 bar)
turn on in automatic mode (key START) with an open tap
-
press together the UP ARROW and DOWN ARROW
-
adjust the required minimum flow (off-flow)
-
wait for the floe stabilization
-
press ENTER to confirm the switch-off frequency
-
Set the parameter Pd in ADV menu at the minimum acceptable working
pressure, in % of the SET PRESSURE.
e.g. PSET = 4 bar; if PD = 50% the inverter will fall in DRY RUNNING at 2
bar.
Switch off power to the inverter MASTER
Connect the inverters through the RS485 standard as shown at page 6 ot
the Manual.
Switch on power to all the inverters
Go to automatic work by pressing START on the MASTER unit
Open all the taps to start both the inverters
1. Check the unit stop by closing all the taps
2. Check the MASTER pump DRY RUNNING alarm by closing the
MASTER suction valve
3. Check the SLAVE pump DRY RUNNING alarm by closing the SLAVE
suction valve
Procedure
See procedure at point 2
See procedure at point 2a
See procedure at point 3
43