FLOWTECH flowboost G.V Operation And Maintenance Manual page 16

Table 2: Wait times
e-SM Drive model
103, 105, 107, 111, 115
303, 305, 307, 311, 315,
322
Start or stop the unit
The starting and stopping of the pumps are determined based on the unit to be controlled (pressure, level)
settings of the controller. Each frequency converter is connected to a sensor. The frequency converters share
all the information and provide for cyclic changeover.
Disconnect the power supply before making any adjustments.
Figure 9 shows the operating method with the curves for two pumps, pressure regulation mode.
The tank supplies water upon demand by a end-user.
When the pressure drops below the PS value, the first pump is started; the speed is adjusted to maintain a
constant pressure as the demand increases.
When the demand decreases the speed is decreased until minimum speed is reached; at this point one of the
pumps is deactivated.
If the demand keeps increasing and the pump reaches maximum speed, the second pump is started and the
speed is adjusted to maintain a constant pressure.
If the demand decreases further the pump slows down, fills the tank and then stops when the PS value is
reached.
Figure 9: Operating method
H Head
Q Flow
Frequency converter adjustments
Modifying the settings, see Installation, Operation, and Maintenance Manual for Smart Drive Electropumps.
Use the frequency converter keypanel to set a new pressure adjustment value, select the time ramps, check
the latest alarms, or access all the adjustment settings.
Make sure that the new selected value is in the head range that is specified in the pump rating plate. Tank
precharge
Minimum waiting times
[min]
4
Pmax Max. pressure
PS Pressure setting value
16