Minimum Pressure Tank And Supply Pipe Sizing - Franklin Electric MONODRIVE UTILITY Manuel Du Propriétaire

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 MonoDrive Utility to a conventional system with an existing large
tank, refer to "Tank Size and Bump Mode Adjustments" on page
The pressure tank pre-charge setting should be 70% of the targeted system pressure. To check the
tank's pre-charge, de-pressurize the water system by opening a tap with the drive off. Measure
with a pressure gauge at the inflation valve and make any necessary adjustments.
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
Minimum Supply Pipe Sizes
The minimum supply pipe inside diameter past the pressure sensor (transducer) should be
selected to not exceed a maximum velocity of 8 feet per second (2.4 m/s) based on the flow rate of
the system.
Maximum GPM (lpm)
11.0 (41.6)
19.6 (74.2)
30.6 (115.8)
44.1 (166.9)
78.3 (296.4)
176.3 (667.4)
Minimum Tank Size up to 1 HP Minimum Tank Size over 1 HP
2 gallons (7.6 liters)
4 gallons (15.1 liters)
Minimum Pipe Diameter
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
26.
4 gallons (15.1 liters)
8 gallons (30.3 liters)
INSTALLATION AND SETUP
Installation Process
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