Minimum Pressure Tank And Supply Pipe Sizing; Submersible Pump Applications; Surface Pump Applications; Minimum Supply Pipe Sizes - Franklin Electric SubDrive 50 Manual Del Usaurio

INSTALLATION PLANNING

Minimum Pressure Tank and Supply Pipe Sizing

Minimum Pressure Tank and Supply Pipe Sizing
A VFD system needs only a small pressure tank to maintain constant pressure, although a larger tank may
be used.
• If adding a drive to a system with an existing large tank, refer to
ments (FE Connect App Only)" on page
• The pressure tank pre-charge setting should be 70% of the targeted system pressure.
Refer to the following recommendations for best performance.

Submersible Pump Applications

Pump Flow Rating
Less than 12 gpm (45.4 lpm)
12 gpm (45.4 lpm) and higher

Surface Pump Applications

Maximum Pump Flow
10 GPM
20 GPM
30 GPM
40 GPM

Minimum Supply Pipe Sizes

The minimum supply pipe diameter past the pressure sensor (transducer) should be selected not to exceed
a maximum velocity of 8 feet per second (2.4 m/s) based on the flow rate of the system.
IMPORTANT: Water system piping should be performed by an experienced professional to ensure adequate
flow.
Maximum GPM (lpm)
11.0 (41.6)
19.6 (74.2)
30.6 (115.8)
44.1 (166.9)
78.3 (296.4)
122.4 (463)
176.3 (667)
240.0 (908)
313.3 (1186)
396.6 (1501)
489.6 (1853)
14
28.
VFD Model
SubDrive 15
SubDrive 20
SubDrive 30
SubDrive 50
SubDrive 15
SubDrive 20
SubDrive 30
SubDrive 50
Minimum Tank Size
2 gallons (7.6 liters)
4 gallons (15.1 liters)
4 gallons (15.1 liters)
8 gallons (30.3 liters)
Minimum Pipe Diameter
0.75"
1"
1.25"
1.5"
2"
2.5"
3"
3.5"
4"
4.5"
5"
"Tank Size and Bump Mode Adjust-
Minimum Tank Size
2 gallons (7.6 liters)
4 gallons (15.1 liters)
4 gallons (15.1 liters)
8 gallons (30.3 liters)
4 gallons (15.1 liters)
8 gallons (30.3 liters)
8 gallons (30.3 liters)
20 gallons (75.7 liters)