7.3 Setting of pressure-maintenance function (Counterpressure)
The pressure-maintenance function generates a counterpressure which:
n prevents siphoning empty of the product tank
n enhances metering accuracy with a free outlet
n prevents undesired emptying of the metering line
Rotary Knob A must be in the "Right-hand stop" position to permit correct
setting.
The base value set can be increased by turning Rotary Knob A using an Allen key
(size: S5), (Fig. 8, Item 2)
counterclockwise and lowered by turning it clockwise.
Fig. 8: Setting of pressure-maintenance function
1 Pressure-maintenance function (Rotary Knob "A")
2 Allen-type adjusting screw
3 Turn in this direction to increase pressure (+)
4 Turn in this direction to reduce pressure (-)
Commissioning / Operation
29 417101434 Rev. 5-05.2019
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