11
R5
auxiliary delivery union
4.8.2 GENERAL INSTRUCTIONS
When using the pressure regulator, scrupulously observe the instructions in the
enclosed handbook, below you will find generic indications for the major models
fitted by Unigreen.
All the regulation and adjustment tests must be carried out with clean water.
Pressure regulators without a volumetric valve
(GCP3-way - RPN - RVA)
Adjusting the maximum pressure valve
=
put main control
A
in the drain position (“OFF”).
=
loosen the hand wheel of maximum pressure valve
B
completely
(anticlockwise).
=
start the pump by activating the power-takeoff of the tractor at 540rpm
=
open main control
A
(position “ON”), the manometer will be activated
=
open all of the section valves
C
(position “ON”)
=
adjust maximum pressure valve
B
to the working value (in any case less than
the safe maximum pressure the system can reach).
Pressure regulators with a volumetric valve (RPN-DPR-ERGO-REMO)
Adjusting the maximum pressure valve
=
put main control
A
in the drain position (“OFF”).
=
loosen the hand wheel of maximum pressure valve
B
completely
(anticlockwise).
=
open volumetric valve
E
completely.
=
start the pump by activating the power-takeoff of the tractor at 540rpm
=
open main control
A
(position “ON”), the manometer will be activated
=
open the drain tap on filter
F
slightly (only ERGO and REMO)..
=
close volumetric valve
E
completely. If the pressure rises over the maximum
limit of the system, make sure maximum pressure valve
B
is open (see previous
indications)
=
open all of the section valves
C
(position “ON”)
=
adjust maximum pressure valve
B
to a value over that of the working
pressure (generally 10-14 bar) and in any case lower than the safe maximum
pressure that the system can reach.
Adjusting the volumetric pressure.
=
with the volumetric pressure valve
E
adjust the pressure to the value the
treatment will be done at (the pressure is indicated on the nozzles tables on the
basis of the tractor speed and litres/hectare to spray)
Warning! The working pressure must be adjusted with the volumetric valve
and not with the maximum pressure valve. In the case the working pressure
is too near to the calibrated pressure of the maximum pressure valve, the
proportional valve may not be able to compensate the speed variations
correctly.
Adjusting the compensated returns
=
close only one tap of section
C
(position “OFF”).
=
adjust the corresponding compensator
G
until you return to the pressure set
previously (displayed on the manometer).
=
open and close the tap of section
C
and check that the pressure remains
constant.
=
repeat the above operations for all the section taps.
If the types of nozzles aren’t changed the regulations carried out will guarantee a
constant spraying of the liquid also per treatments that are done at different
working pressures.
NB: if the type of nozzle is changed then the calibrating will have to be done
again.
4.9
DELIVERY FILTERS (ONLY EQUIPPED MODELS)
Particularly useful when using small (low volume) nozzles.
In a central position with a manometer after the filter that shows any blockages in
the cartridge. On the RVA version there is also a manometer before the cartridge
to make it easier to find the problem.
For cleaning the cartridge in the model RVA you should open the drain with the
relevant lever (Fig. N° 4) for 2-3 minutes during the washing operations, as in the
enclosed instructions.
You should clean the cartridge by hand periodically, on the basis of the product
used. To clean, stop the pump. Wear rubber gloves and the other personal
protective equipment when cleaning.
FIG. 4
