Xylem IM131R01 AQUAVAR AV II - Manual (Page 47)

VII. Setting A Second Fixed Required Value
The AQUAVAR II controller can also be used in applications where the required value changes. As an
example, a single pump system might be used to supply both water supply and irrigation needs on
a farm. When the irrigation system is used, the pressure which needs to be maintained is higher
than the pressure for normal water supply. The AQUAVAR II gives you the ability to program in this
higher set point and to automatically change to it when the irrigation system turns on, and change
back when it turns off.
Electrical
Wiring for the switch to change between one set point and the other is shown below. This could be
a normal switch or a timer for automatic operation. Wire the switch to X1-14 and X1-10 (ground).
When the switch is open, set point 1 is used. Closing the switch activates set point 2.
*Refer to Appendix B for explanation of terminals.
Programming
46
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Digital Input
X1
Voltage signal input 0..10V or 2..10V
Current signal input 4..20mA
Analogue signal output 0-10V
Ground
Motor thermoswitch or PTC
Low Water
External on/off
+15 VDC max. 100mA
Actual value signal input 4-20mA
Screen
External switch
between required
value 1 and
required value 2