Hardi ZENIT, Instruction Book

Page: 40 / 64

5 - Ope r a tion
5.8
BK/2 Ma nu al contro l
After filling the tank with clean water, locate your sprayer in a suit-
able location to spray water from the nozzles.
Before starting the pump, turn the main On/Off valve (A) to the “On”
position (“Up” as shown) and turn the HARDI-MATIC valve (C) count-
er clockwise all the way out.
Open or close levers (F) depending on whether pressure agitation
and/or the powder mixer is required.
Turn the left and right nozzle section valves “On” by pulling the
levers (B) “Down” and towards you (the valves are shown in the “Off”
position).
With the pump operating at 540 r.p.m., slowly turn the HARDI-MATIC
valve (C) in (clockwise) until the desired pressure is reached on
gauge (E). Note this pressure to adjust the pressure equalization
valves below.
Adj ust me nt o f p r e ssur e eq u al i za tion
Before using the sprayer for the first time, it is necessary to adjust the
constant pressure valves (1). Adjust the valves one section at a time
as follows:
1. Place the first lever (2) in the “Off” position (“Up”).
2. Turn the adjusting screw (1) until the pressure gauge (E) again
shows the same pressure as when both valves were on (Turn the
valve clockwise for higher pressure, counter clockwise for lower
pressure).
3. Turn the lever (2) back to the “On” position (“Down”).
4. Repeat steps 1 through 3 for the other section valve.
When properly adjusted, the pressure should remain the same
whether both valves are open, or if either one of the section valves
is closed.
ATTENTION! Hereafter, adjustment of the constant pressure valves will only be needed if you change to nozzles
with other capacities, but not required if only changing pressure or application rate using the same nozzles.
Ope r a tin g t he contro l unit wh i le d ri v in g
In order to shut off all nozzles, turn the “On/Off” valve (A) to the “Off” position (“Down”). This returns the pump output to
the tank through the return system. The diaphragm non-drip valves ensure instantaneous closing of all nozzles.
In order to shut off one of the nozzle sections, turn the appropriate section valve lever (B) to the “Off” position (“Up”). The
constant pressure device ensures that the pressure does not increase in the section which is still operating.
ATTENTION! The P.T.O. revolutions must be kept between 300-
540 r.p.m. for the HARDI-MATIC to function properly.