Liquid System; Self-Cleaning Filter - Choice Of Restrictor; Adjustment Of Evc Operating Unit - Hardi Master Plus Instruction Book

Liquid system

Self-Cleaning Filter - Choice of Restrictor

It is important to have a large flow through the filter. This is achieved by
choosing the restrictor size in relation to the liquid consumption of the
spray boom. 4 restrictors are supplied. Use the green one with largest
orifice (A) first.
Remove the hose (N) from the filter. Be careful not to loosen the seal.
Place the restrictor in the hose and mount the hose again.
If the required working pressure cannot be obtained, the restrictor is too
large. Choose a smaller restrictor. Start with a black one, then a white and
finally a red one.
When cleaning the filter, remove the hose (N) and the hose at the safety
valve and check that there are no residues.
Standard filter size is 80 mesh. Filters of 50 and 100 mesh are available
and can be changed by opening the filter top.
Check the condition of the O-rings before reassembly and replace them
if damaged.

Adjustment of EVC Operating Unit

Adjust the EVC operating unit before spraying, using only clean water
(without chemicals).
1. Choose the correct nozzle for the spray job by turning the TRIPLET
nozzle bodies. Make sure that all nozzles are of the same type and
capacity. See the "Spray Technique" book.
2. Set the main ON/OFF switch to ON at the spray control unit.
3. Turn all distribution valve switches ON at the spray control unit.
4. Press down the pressure regulation switch at the spray control unit
until the emergency handle on the valve stops rotating (minimum
pressure).
5. Put the tractor in neutral and adjust the PTO and thereby the
number of revolutions of the pump corresponding to the intended travelling speed. Remember to keep the number
of revolutions of the PTO between 300-600 rpm (pump 540 rpm) or 650-1100 rpm (pump 1000 rpm).
6. Push up the pressure regulation switch at the spray control unit, until the required spray pressure is shown on the
pressure gauge.
Adjustment of pressure equalization:
7. Close the first section valve on the spray control unit.
8. Turn the adjusting screw for the corresponding valve, until the pressure gauge shows the same pressure as when all
sections were open.
9. Open the section valve again.
10. Adjust the next section valves in the same way.
μ
ATTENTION! Hereafter adjustment of pressure equalization will only be needed when:
• you change to nozzles with other capacities
• the nozzle output increases, as the nozzles wear out
4 - Sprayer Setup
41