Franklin Electric SUBDRIVE UTILITY UT2W 5870202003 Serie Manuel Du Propriétaire page 24

ADVANCED CONFIGURATION, CONT'D
Tank Size and Bump Mode Adjustments
The Tank Size and Bump Mode settings of the drive can be changed to modify system performance. Bump Mode controls how hard the drive will
pump for the very short time period just before attempting to shut down. The default Tank Size and Bump Mode settings are compatible with
most SubDrive applications. For applications with large pressure tanks or trouble shutting down, the Tank Size and Bump Mode can be modified to
make the controller more aggressive. The system behavior should be monitored when adjusting these settings to ensure proper operation.
Tank Size Selection (DIP SW3 - Position 3)
The SubDrive controller in general allows for a smaller pressure tank to be used, with a minimum of 20 gallons. If a larger pressure tank exists
in the system, the pressure control may need to be adjusted to help the system properly shut off at low or no flow. If a 20-gallon pressure tank
is being used and the system is shutting off as expected, SW3:3 may remain in the ST (down) position. If a larger pressure tank is used, or if the
system is having difficulty shutting down at low or no flow, SW3:3 can be placed in the LT (up) position to improve the ability of the system to
shut off at low-flow conditions.
Aggressive Bump (DIP SW3 - Position 4)
In applications where the default bump setting is not aggressive enough for the system to shut down as expected, the bump can be modified to
be more aggressive. To enable the Aggressive Bump feature, DIP SW3:4 must be in the AB (up) position.
Bump Disable (DIP SW3 - Position 5)
In applications where the occasional pressure bump is not desirable, the bump feature of the drive may be disabled. To disable the bump
feature, DIP SW3:5 must be in the BD (up) position. Disabling the bump feature will result in the system having more difficulty shutting
down in low-flow situations.
Minimum Speed (DIP SW3 - Position 8)
In submersible pump applications where nuisance hydraulic vibration occurs at minimum speed, the minimum speed can be increased.
To increase minimum speed to 40 Hz, DIP SW3:8 must be in the HZ (up) position.
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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.
DO NOT POWER ON OR USE THE DRIVE WITH THE COVER REMOVED.
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