Performance Settings; System Response (Dip Sw2 - Positions 2-4); Drawdown Feature (Dip Sw2 - Position 5); Minimum Frequency (Dip Sw3 - Position 8) - Franklin Electric SUBDRIVE UTILITY UT3P Manual Para Propietarios

Performance Settings

Risk of damage to
adjustment or settings.
• System behavior should be monitored when adjusting any of these settings to ensure proper operation.
• Confirm that an adequate pressure relief valve is included in the system.
System Response (DIP SW2 – Positions 2–4)
When using a pressure transducer, the system response time can be adjusted to match user demands
related to a specific piping network. Faster response times can improve pressure stability in some systems.
However, if the response is too fast, the system could overshoot, leading to overpressure, rapid cycling, or
hydraulic noise.
Select one DIP switch for preset FAST, MED, or SLOW system response parameters. Selecting more than one
switch will result in an Invalid Configuration fault. If no selection is made, the system will default to SLOW
(no fault occurs).
Drawdown Feature (DIP SW2 – Position 5)
When using a pressure transducer, an optional "cut-in" pressure can be set to allow for more water to be
drawn from the tank. Drawdown isn't enabled or disabled, it's 5% or 20%. It's always enabled. For example,
a system setpoint pressure is 50 PSI and a cut-in pressure of 30 PSI would cause the drive to maintain sys-
tem pressure at 50 PSI when running; however when the system is idle, the drive will not start the motor
until the system pressure drops below 50 - 30 PSI = 20 PSI.
The default cut-in pressure is 5% of transducer range below the system pressure setpoint. Setting DIP SW2
Position 5 in the DD (up) position will change the cut-in pressure to 20% below the system pressure setpoint.
IMPORTANT: Pressure tank pre-charge should be less than cut-in pressure in all situations (whether draw-
down is at 5% or 20%).
Minimum Frequency (DIP SW3 – Position 8)
Minimum Frequency is always 30 Hz for 3-Phase and 3-wire Submersible. Minimum Frequency is adjustable
for surface motors. For 15 Hz operation, set SW3 position 8 to the down position. For 30 Hz operation, set
SW3 position 8 to the up position.

Underload Sensitivity

The drive is configured at the factory to ensure detection of Underload faults in a wide variety of
pumping applications. In rare cases (as with certain pumps in shallow wells), this trip level may
result in unnecessary faults. If the pump is installed in a shallow well, activate the drive and
observe system behavior. Once the system begins to regulate pressure, check operation at
several flow rates to make sure the default sensitivity does not cause false Underload trips.
NOTE: When operating a surface pump, the drive includes a non-adjustable Prime Delay. Each
time the pump is started, any underload condition will be ignored for a period of two minutes
to allow the pump to prime.
If it becomes necessary to adjust the Underload trip level, remove power and wait a minute or two for the
drive to discharge. Once the internal voltages have dissipated, locate the Underload Potentiometer on the
upper-right corner of the User Interface Board.
d
rive or water system can occur due to improper
DRIVE CONFIGURATION
Performance Settings
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