Hydrovar Pump Controller Installation & Operation Manual
Hydrovar Pump Controller Installation & Operation Manual
Hydrovar Pump Controller Installation & Operation Manual
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Programming<br />
Example for using the Offset function:<br />
Constant pressure system with required value of 70 PSI.<br />
Additionally a flow sensor is connected to the Offset input.<br />
Parameter [907] - Offset Range = 300 (maximum range of flow sensor = 70 GPM)<br />
System requirement 1:<br />
5 bar constant pressure while the flow rate is between 20 GPM and 50 GPM.<br />
Below 20 GPM the pressure should be decreased to maximum 36 PSI at a flow rate of 8 GPM.<br />
Settings:<br />
Parameter [0910] - Level 1 = 50 = 20 GPM (first limit where the offset function is active)<br />
Parameter [0912] - Offset X1 = 20 = 8 GPM (fixed point according the requirements)<br />
Parameter [0913] - Offset Y1 = 2.5 = 36 PSI (max. allowed pressure at this flow rate)<br />
System requirement 2:<br />
70 PSI constant pressure while the flow rate is between 20 GPM and 50 GPM.<br />
Above the 50 GPM the pressure should be increased with the limitation to have maximum 87 PSI at maximum<br />
flow rate of 16m³/h.<br />
Settings:<br />
Parameter [915] - Level 2 = 120 = 50 GPM (second limit where the offset function is active)<br />
Parameter [917] - Offset X2 = 160 = 16m³/h (fixed point according the requirements)<br />
Parameter [918] - Offset Y2 = 6 = 87 PSI (required pressure at this flow rate)<br />
Required<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
OFFSET X2<br />
OFFSET X1<br />
2 m 3 /h<br />
OFFSET Y1<br />
Required Value<br />
5 m 3 /h 12 m 3 /h<br />
Level 1 Level 2<br />
Offset<br />
67<br />
OFFSET Y2<br />
0 20 40 60 80 100 120 140 160