Pump Sizing
The SubDrive300 is configured at the factory for use with 3 Hp pumps that are mounted to 5 Hp Franklin Electric
SubDrive300 will enhance the performance of a 3 Hp pump to a similar or better performance than a conventional 5 Hp pump of the same flowrating (pump series).
To select the proper 3 Hp pump, first choose a 5 Hp curve that meets the application’s head and flow requirements. Use the 3 Hp 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.
Total Head (ft)
Typical SubDrive300 Performance
700
)Q(1.XJUI4VC%SJWF
$POWFOUJPOBM)Q(1.1VNQ $POWFOUJPOBM)Q(1.1VNQ
600
500
400
300
200
100
5 | 15 | 30 | 45 | 60 | 75 |
Flow GPM
Drive Configuration
The SubDrive300 can also be set up to run a 5 Hp pump if desired, but the larger pump will still produce to the 5 Hp curve and may only be operated with a 5 Hp 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 Hp 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.
SW1 |
O N |
Configuration Switch
1 | Pump Size |
OFF | 3.0 Hp |
ON | 5.0 Hp |
▲! 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!
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