ARAG Electriccontrol unit for crop-spraing application 871 - Manual (Page 3)

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CONTENTS
• Legend of symbols ..........................................................................................................2
1 Product description .........................................................................................................4
1.1 Intended use ............................................................................................................4
2 Product functionality .......................................................................................................5
2.1 Components of electric control units ........................................................................5
2.1.1 Electric control units with main control valve SERIES 871 ....................................5
2.1.2 Electric control units with main control valve SERIES 864 ....................................6
2.2
Components function ...............................................................................................7
3 Installation ........................................................................................................................8
3.1 Safety regulations ....................................................................................................8
3.2 Installing and connecting the unit ............................................................................8
3.3 Connecting up the system ..................................................................................... 10
3.4 Electrical connections ............................................................................................ 11
3.5 Connection to control devices ................................................................................ 12
4 Setting before use ..........................................................................................................13
4.1 Electric unit adjustments before operation ............................................................. 14
4.2 Adjustment of maximum operating pressure (only applicable for units
with proportional valve) .......................................................................................... 16
5 Use ..................................................................................................................................17
5.1 Calibration of operating pressure ........................................................................... 17
5.1.1 Constant pressure units .......................................................................................18
5.1.2 Units with proportional valve ...............................................................................18
5.2
Calibrating the metered by-passes ........................................................................ 19
5.2.1 Metered by-pass calibration tables .....................................................................21
6 Maintenance / Diagnostics / Repairs ............................................................................22
6.1 Flushing the liquid passages of the electric control units.......................................22
6.2 Cleaning the filters .................................................................................................23
6.2.1 Manual cleaning ..................................................................................................23
6.2.2 Automatic cleaning of self-cleaning filters ...........................................................24
6.3 Troubleshooting .....................................................................................................27
7 Technical data ................................................................................................................29
7.1 Correspondence between valve parts and maximum valve pressure ....................29
8 End of life disposal ........................................................................................................30
9 Guarantee terms.............................................................................................................30