ARAG 481 Series User guide

Serie 481
electric control unit
With Solenoid valveS
for orchard Sprayer applicationS
uSe and maintenance
02

This manual is an integral part of the equipment to which it refers and must accompany the equipment in
case of sale or change of ownership. Keep it for future reference; ARAG reserves the right to modify the
specications and instructions regarding the product at any time and without prior notice.
•Legend symboLs
=Generic danger
=Warning

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contentS
•Legend symbols...............................................................................................................2
1 Product description .........................................................................................................4
2 Intended use.....................................................................................................................4
3 Unit layout ........................................................................................................................5
3.1 Fittings .....................................................................................................................5
4 Installation........................................................................................................................6
4.1 Safety regulations ....................................................................................................6
4.2 Installing and connecting the unit ............................................................................7
4.3 Connecting up the system .......................................................................................9
4.4 Connection to control devices..................................................................................9
5 Setting before use.......................................................................................................... 10
6 Use .................................................................................................................................. 10
7 Maintenance / Diagnostics / Repairs............................................................................ 11
7.1 Flushing the liquid passages of the solenoid control units..................................... 11
7.2 Troubleshooting ..................................................................................................... 11
8 Technical data ................................................................................................................ 12
8.1 Technical features.................................................................................................. 12
8.2 Valve parts and the corresponding control unit maximum pressure ......................12
9 Disposal at the end of service ...................................................................................... 12
10 Guarantee terms.............................................................................................................14

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1 Product descriPtion
The control units with solenoid valves were designed for connection to electrical and computer sy-
stems for orchard sprayer and pesticides row spraying applications where immediate valve opening
and closing is very important. They can consist of 2 or 4 section valves.
The system shall feature a lter and a maximum pressure valve suitable for the application.
Please refer to ARAG catalogue when selecting the necessary components.
ARAG is not liable for direct or indirect damage due to the type of product used for
treatment with its control units.
The operator has full liability for the use of these products and therefore must verify
the safety regulations indicated on the package by the manufacturer of the liquid
and must wear suitable protective clothing (gloves, overall, footwear, helmet, etc.) as
required by law.
ARAG is therefore not liable for any damage or injury to persons, animals or things
as a result of the incorrect use of the products employed, without protection or con-
trary to recommendations.
2 intended use
This device is designed to work on agricultural machinery for crop spraying
applications.
The machine is designed and built in compliance with EN ISO 14982 standard
(Electromagnetic compatibility - Forestry and farming machines), harmonized
with 2014/30/UE Directive.

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3 unit LAYout
s1-s2 Solenoid coils
They open/close the corresponding section separately.
u1÷u2 Output to sections
in Inlet of uid to be sprayed
3.1 Fittings
Use couplings with fork-shaped ends supplied with the control unit to connect the unit to system
(please refer to diagram in Fig. 1).
Fig. 1

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4 instALLAtion
4.1 Safety regulations
• Do not install the control unit inside the driver’s cab.
• The parts and the hoses that are installed on the main pressure line (delivery line)
must be capable of withstanding greater levels of pressure than that of the maximum
pressure valve.
• Make sure the hoses used are suitable for the diameters of the chosen hose tails.
Use systems to secure the hoses that are suitable for the hoses in question.
It is recommended to install a pressure-relief device (Series 459 on general ARAG
catalogue) on the pump to avoid risks caused by a unit malfunction.
This device does not replace a further safety valve, but it can limit unit damages in
case of sudden over-pressures.
Have the unit installed by qualied personnel.
ARAG is not liable for any damage to equipment or injury to persons, animals or
things caused by incorrect or unsuitable connection of the unit.
Likewise, ARAG is not liable for any damage caused directly or indirectly to equi-
pment or machinery, or injury to persons or animals caused by unsuitable or unt
hoses, cable grips, wraps or other accessory.
All forms of warranty are rendered null and void in case of damage to the unit caused
by the above.

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4.2 Installing and connecting the unit
Install the control unit using M8 screws (not supplied) in the relevant holes (A) on brackets and by
means of the preset ttings set in place by the farming machine's manufacturer in order to ensure
correct fastening, as shown in Fig. 2.
CAUTION:
The control unit must be installed in a horizontal position, as shown in Fig. 3.
ANY OTHER POSITION IS DEEMED INCORRECT.
Fig. 2
Fig. 3

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Fig. 6
The control unit is designed for installation on the chassis of a farming machine; it comes with a
drilled bracket for proper installation.
Dimensions (mm) Drill. master (mm)
Code ABc d e F
481600002 200 180 65 113 40 107
481600004 200 180 65 168 40 165
Fig. 4 Fig. 5

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4.3 Connecting up the system
Connect the hoses in the system according to the layout shown below.
4.4 Connection to control devices
• The connection diagram is for illustrative purposes only; to ensure correct opera-
tion, always refer to the installation manual relevant to the control device you are
using.
• Connections and setting into operation are best left to qualied personnel.
ARAG disclaims all liabilities for damage to equipment, persons, animals or things
resulting from wrong or improper connection of the unit.
• Any damage to the unit resulting from the above will automatically invalidate any
warranty rights.
Electric units are designed for connection to relevant ARAG control devices (computer and control
boxes).
Each control device comes complete with the necessary connection cables and all cables are marked
for ease of identication; please see Fig. 7 for a description of cable marks and their meanings.
• Use only the cables supplied with ARAG computers or control boxes.
• Do not pull on the cables. Be careful not to break, tear or shear the cables.
• Check wiring and cables for damage from time to time.
• Minimum required cross-section area for cables connected to main control valve is
1,5 mm2.
• Any damage resulting from use of unsuitable cables or anyway other than ARAG
cables will automatically invalidate any warranty rights.
ARAG disclaims all liabilities for damage to equipment, persons, animals or things
resulting from the above.
Fig. 7
s1-s2 Solenoid coils
in Inlet of uid to be sprayed
PMaximum pressure valve

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• “Energy Saving” electronic cable for control units with solenoid valves:
It is possible to install the unit with an optional "Energy Saving" electronic cable (order code
481600.100 ARAG catalogue) which adds an energy-saving feature. This cable (1,3 m long) is
equipped with an electronic connector that cuts off current draw after valve opening. A led is ON
during connector operation.
5 setting before use
• ONLY use clean water for any intervention or adjustment without any chemical
additives.
• Observe rated power supply voltage.
• Make sure to disconnect power to the device before arc welding; consider physical-
ly disconnecting the power supply cables.
6 use
For detailed information on operation or adjustment of unit valves, ALWAYS refer to
the operating and maintenance instructions manual relevant to your control device.
Open/close individually or at the same time the solenoid valves for the right and left-hand sections
by activating the corresponding switch on control device (ON / OFF position).
Fig. 8