Xylem IM043 AQUAVAR Variable Speed Pump Control - Manual (Page 61)

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ADC Reference
This setting tells the unit where to look for the actual value signal. Set to “LOCAL” if the actual
value is obtained from a 4-20mA transmitter wired to the unit’s actual value input terminals (X1:
2, 3). Set to “REMOTE” if the actual value is obtained from the RS-485 port via a remote device.
Default is local.
Frequency Lifting
Allows modification of the required pressure to accommodate for system frictional losses due to
increased flow. Enter the speed at which system losses are a concern and compensation should
begin to be added to the required pressure. Typical settings are 40 HZ for a 60 HZ motor and 30
HZ for a 50 HZ motor. See section III for more information. System curve compensation for one
pump at a certain frequency.
Lift Intensity
Enter a value for increasing the required pressure due to frictional losses once the frequency lifting
speed is exceeded. Calculate the pressure drop due to frictional losses and divide by the required
pressure and input this value as a percentage. Enter 0% if frictional losses are of no concern.
Increases the output pressure in PSI (used for one pump systems).
Reference
This display is located in the RS-485 Submenu and shows whether control is being received from
the local ADC (Analog/Digital Converter) or from another source shown as “ SIO” via the RS-485
interface.
Analog Out
It is possible for the AQUAVAR controller to supply an output signal from 0-10 Volts at a maximum
of 2 mA. Connection of the outside recording device (such as a meter) is done at terminals 10
(ground) and 11 (output signal) of terminal strip X1 inside the AQUAVAR controller drive head.
The “Analog Out” display allows you to select either frequency or pressure as the output to be
displayed. 0-10 Volts equals 0-100% in either frequency or pressure.
Pressure units
This display allows the user to select Bar, PSI, or meters of water for pressure or gallons per
minute for flow, or percent. If percent is selected, the percentage displayed will be the percentage
of the maximum sensor value. Default is PSI.
Operator Custom Features and Displays