Xylem IM043 AQUAVAR Variable Speed Pump Control - Manual (Page 53)

xI. Multiple Pump - Pump Protection
The AQUAVAR controller can protect the pump by shutting it off in low/no suction or run out conditions.
To set low/no flow and run out protection:
Instructions
1. Press the key for 2 seconds and
advance to the:
• Use to enter 66.
• Use the key to scroll to:
*Conveyor limit is default “disabled”.
Use and to set a low discharge
pressure shut off value.
2. Press the key for 2 seconds to display:
Set the minimum pressure the system is
allowed to maintain before shutting down.
For example, if the set point for the system is
60 PSI and the operator will allow anything
above 55 PSI, then the conveyor limit would
be set at 54 PSI.
• Press again briefly to advance to:
• Enter the amount of time the pump is allowed to run after the suction pressure switch or
float switch has activated. This is also used to set the amount of time the pump can run at
maximum frequency after the pressure drops below the conveyor limit.
52
Programming
PASSWORD 0000
Screen
Low/no suction protection depends on the installation of a suction line pressure
switch or float switch for a tank. This switch is connected to the AQUAVAR controller as
described earlier in the electrical installation section. The cut out setting for a suction
pressure switch should be greater than the maximum NPSH required by the pump.
Note
When using this feature, each pump in the system can have its own switch or a
junction box must be used for multiple pump operation with one switch.
Note
SUBMeNU eRRORS
CONVeyOR LIMIT - 40 PSI
DeLAy TIMe
0.0 SeC
DeLAy TIMe
2.0 SeC
0066
t
t
t
*
*
*
*