Installer Pre-Start Selections; Minimum Frequency (Speed) Switch; Dry Run Restart; Low Pressure Cut-Off - Xylem 3AB2 Manual De Instrucciones

3. INSTALLER PRE-START SELECTIONS

3: INSTALLER PRE-START SELECTIONS
DRIVE SETTINGS AND PROTECTION
Setting the Minimum Frequency Switch
The Minimum Frequency Switch (figure 3) is used to set
the minimum speed of the motor. This allows the controller
to fit a wide range of applications. Select a Minimum
Frequency of 10 Hz if the pressure at the pump's suction
is within 20 PSI of the desired pressure setting. Select a
Minimum Frequency of 30 Hz if the pressure at the pump's
suction is more than 20 PSI below the desired pressure
setting, such as when pumping from a tank or if drawing a
suction lift.
If used with a submersible well pump,
CAUTION
minimum frequency switch must be set to 30
Hz. Failure to do this will cause the motor thrust bearing to
wear prematurely.
Setting the Ramp Setting
The position of the Ramp Setting Switch (figure 3)
determines how fast the controller can change the speed
of the motor. A Slow Ramp Setting allows the controller
to work better in applications where the average demand
for water is low (less than 3 GPM or about 1 faucet). A
Fast Ramp Setting allows the controller to work better in
applications where demand for water is high because the
motor is allowed to change speed faster.
Note: The Ramp Setting is preset at the factory for the "6
O'Clock" position which is a half way point between fast
and slow. If "Hunting" or pressure fluctuation occurs, turn
dial to slower setting.
Setting Dry Run Restart Switch
The controller detects when pump has no water or has
lost prime. The Dry Run Restart Switch determines how
many times this error can occur in an hour. If set to CONT
(continuous), it will always restart. If set to 5X, it will
restart 5 times before it will disable pump and display "No
Water/Loss of Prime" error (2 red blinks). "No Water/Loss
of Prime" error can be cleared by removing power from
controller for 1 minute. Check water supply.

Low Pressure Cut-Off

This fault is disabled for the first 10 minutes of pump run
time after power up to allow the system to be purged.
ON Position - Used for constant pressure systems. The
drive will turn off if the system pressure drops 20 PSI
below the system set point pressure for 30 seconds.
This fault must be manually reset, it will not clear
automatically, this may prevent property damage if a pipe
breaks.
OFF Position - Use for open discharge situations such as
filling a pond or tank, or whenever the system pressure
will be 20 PSI or more below the system set point
pressure.
Pressure Drop – 5 PSI or 20 PSI
The pressure drop before the pump restarts can be set to
the standard 5 PSI or to 20 PSI.
The 20 PSI setting results in fewer starts for systems with
leaks. It is recommended for irrigation systems. It will
require a tank pre-charge adjustment. See Tank Sizing and
Tank Pressure Setting.
CURRENT LIMIT PROTECTION

Motor Overload Setting Dial

Failure to properly adjust the Motor
WARNING
Overload Setting before applying power may
damage the motor or wire and void the warranty.
• Use Figures 3 and 4 to determine which controller and
setting to use. Note that some 200V motors require
upsizing to the next larger controller.
• Set the Motor Overload - Turn the dial pointer to align
with the motor's service factor amps (SFA). Choose the
amperage value on UIB that is closest to the SFA listed on
the motor nameplate but not higher.
• If the output current exceeds the motor overload setting,
the controller will limit current by reducing the output
voltage and frequency. If the controller reduces the output
frequency to 40 Hz and the current still exceeds the
motor overload setting, the controller will shut down and
indicate Over Current error (4 red blinks).
Purge the System of Air
• Insure that plumbing connections are tight and wire
connections are correct.
• Partially open a valve and turn power to controller on.
• Run the pump and controller with the furthest and
highest faucets or valves in the system open. This will
allow all air to escape the piping system.
• When flow is constant, close the faucets or valves and
allow the system pressure to reach the 50 PSI pre-set
pressure and shutdown.

Controller Status Indicator

Window in Cover)
The controller status indicator light has 3 possible modes:
• Solid green = Standby, pump not running. There is no
water flow or the SWITCH INPUT is open.
• Blinking green = Pump running. There is flow (possibly a
leak) and the SWITCH INPUT terminals are connected to
each other (closed).
• Red = Error/Fault. Light will blink to indicate a particular
fault. See Troubleshooting Section for Fault Codes.
PRESSURE ADJUSTMENT – Only if pressure
other than 50 PSI is desired:
• Adjust tank pressure according to the desired set pressure
- see Tank Sizing and Tank Pressure Setting section.
• Open a faucet and allow pump to start and purge the
system of air.
• When pressure gauge reaches 50, Press and Hold the
Increase pushbutton until the desired pressure shows on
the gauge.
• The larger the tank the longer it will take to increase
pressure.
• When desired pressure is reached, close the faucet and
allow the system to shut down.
Pump size determines the maximum flow and head which
can be provided, if flow or head are not sufficient and
rotation on three-phase units has been verified, a larger
pump is required.
(Light Visible Through
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