Setpoint Select Input; Minimum Frequency (Speed) Switch; Dry Run Restart; Low Pressure Cut-Off - Xylem CentriPro Aquavar ABII+ 3AB2 Manuel D'instruction

• The MODE button is also used to access the Advanced
Menu. To enter the Advanced Menu, press and hold the
MODE button for 5 seconds. See the Advanced Menu
section for details.

Setpoint Select Input

• The controller can store 2 different pressure setpoints.
Only 1 setpoint is active at any time. The active setpoint is
the target pressure for the controller. The active setpoint
is selected through the Setpoint Select Input on the UIB.
• This input can be used to produce 2 different operating
conditions for the system. This can be useful in irrigation
and geothermal systems. Devices such as a timer
controlled relay, float switch, pressure switch or any other
non-powered switch can be used to control this input.
• The Setpoint Select Input wires must
CAUTION
never be in the same conduit with power
wires. There should always be a minimum of 12" between
the Setpoint Select Input wiring and the power wires.
Failure to separate these wires can cause controller
malfunction.
• When the Setpoint Select Input is open the active setpoint
is set to Setpoint 1 ("SP1"). When the Setpoint Select
Input is closed the active setpoint is set to Setpoint 2
("SP2").
BASIC 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.
Dry Run Restart Switch
The controller protects the pump from damage by
detecting conditions such as a dry or air bound pump.
The controller will turn off the pump and issue the No
Water/Loss of Prime fault (2 red blinks, 02) when a
damaging situation is detected. The Dry Run Restart
Switch determines how many times this fault will reset.
The time between detection of the fault and reset of
the fault is controlled by the No Water/Loss of Prime
(Dry Well) Settings (S) settings in the Advanced
Menu. Refer to the Advanced Menu section for details
on configuring the No Water/Loss of Prime (Dry Well)
restart time.
If the Dry Run Restart Switch is set to "Cont."
(Continuous), the controller will always restart according
to the selection made in the S menu. If the Dry
Run Restart Switch is set to "5X", the controller will
automatically restart the No Water/Loss of Prime
fault according to the selection made in the S
menu 5 times. After the fifth time, the controller will
require a manual reset to clear the fault. Refer to the
8
Troubleshooting Section for details on clearing the No
Water/Loss of Prime fault.
NOTE: If both pushbuttons are pressed to clear the
No Water/Loss of Prime fault, the number of Dry Run
Restarts will be reset to 0.

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.

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.
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 Tables 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). For three
phase motors and any other motor without integral
thermal protection choose the amperage value on the
UIB that is less than or equal to the SFA listed on the
nameplate. For single phase motors and other motors
with integral thermal protection choose the amperage
value on the UIB that is closest to the SFA listed on the
nameplate.
• If the output current exceeds the motor overload setting,
the controller will limit current by reducing the output
voltage and frequency. This will reduce the performance
of the pump. The controller tracks the thermal load of the
motor by monitoring the output current and comparing