Franklin Electric MonoDrive, Installation Manual, Page: 12 / 48

12
SubDrive/MonoDrive
Pump Sizing – SubDrive300
The SubDrive300 is configured at the factory for use with 3.0 hp (2.2 kW) pumps that are
mounted to 5.0 hp (3.7 kW) Franklin Electric three-phase motors. In general, the SubDrive300
will enhance the performance of a 3.0 hp (2.2 kW) pump to a similar or better performance than
a conventional 5.0 hp (3.7 kW) pump of the same flow rating (pump series).
To select the proper 3.0 hp (2.2 kW)
pump, first choose a 5.0 hp (3.7 kW)
curve that meets the application’s
head and flow requirements. Use the
3.0 hp (2.2 kW) pump in the same
pump series (flow rating). The
SubDrive300 will adjust the speed
of this pump to produce the
performance of the 5 hp curve. An
EXAMPLE of this is illustrated in the
graph at right. Please consult the pump
manufacturer’s pump curve for your
specific application.
Drive Configuration
The SubDrive300 can also be set up to run a 5.0 hp (3.7 kW) pump if desired, but the larger pump
will still produce to the 5.0 hp (3.7 kW) curve and may only be operated with a 5.0 hp (3.7 kW)
motor. To operate a different pump size, a DIP switch must be positioned to select the correct
pump rating. Otherwise, the SubDrive300 may trigger erroneous faults.
To configure the SubDrive300 for a 5.0 hp (3.7 kW) pump, locate the DIP switch marked “SW1”
at the lower right corner of the main circuit board. Use a small screwdriver (provided) to change
the DIP switch setting according to the chart as shown.
s
WARNING
!
Serious or fatal electrical shock may result from contact with internal electrical components.
DO NOT, under any circumstances, attempt to modify DIP switch settings until power has
been removed and 5 minutes have passed for internal voltages to discharge! Power must be
removed for DIP switch setting to take effect.
Flow
EXAMPLE 4
Typical SubDrive300 Performance
T
otal Head
3.0 hp (2.2 kW), 40 gpm with SubDrive300
Conventional 5.0 hp (3.7 kW), 40 gpm Pump
Conventional 3.0 hp (2.2 kW), 40 gpm Pump
ON
1
2
3
4
SW1
Configuration
Switch SW1
NEMA 4
1
2
34
O N
1
2
3
4
O N
3.0 hp (2.2 kW)
(default)
5.0 hp (3.7 kW)
210
180
150
120
90
60
30
0
m
700
600
500
400
300
200
100
0
ft
5 15 30 45 75 60
gpm
19 56 11 170 283 227 lpm