Hardi Navigator 550M Centrifugal, Supplement To Operating Instructions

Page: 11 / 16

9 SUPPLEMENT TO NAV. 550M, 800M, 1000M CENTRIFUGAL OPERATOR'S MANUAL
4.B Adjustment of Constant Pressure
Note: Adjust the constant boom section pressure one section at a time
as follows: (Start with the valve turned closed before adjusting).
1. Shut-off the fi rst boom section valve switch (G) .
2. Turn the adjusting screw (1) until the control unit pressure
gauge (4) again shows the same pressure as set in step 6
(Section 4.A). (Turn the screw clockwise for higher pressure, coun-
terclockwise for lower pressure).
3. Turn the boom section valve switch (G) back on.
4. Repeat steps 1 through 3 for the remaining boom section valves.
Note: Hereafter adjustment of the constant boom pressure 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.
5. Operating the control unit while driving: In order to shut off the entire
boom, turn ON/OFF switch (C) to "Off" position. This returns all the
pump outputs to the tank through the return system. The diaphragm
antidrip valves ensures instantaneous closing of all noz zles.
In order to shut off one or more sections of the boom, switch one or
more unneeded boom section valves
(G) to "Off" position. The constant
pressure device ensures that the pressure does not increase in the
sections which are still operating.
In case of electrical failure, it is still possible to manually override all
functions of the operating unit. To operate manually, disconnect the
multiplug from the spraybox fi rst and operate the handles by hand. It is
possible to change pressure, turn boom sections on or off, or shut off
the complete control unit manually.
IMPORTANT: When the sprayer is stored, the spraybox and the
multiplug must be protected against moisture and dirt. A plastic
bag may be used to protect the multiplug. Store the control box in
a clean dry place.