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A1-4 B
C1-4
A = Distribution Valves
B = Flow Transducer
C = Adjustment Screws for pressure equalisation
Fig 14
4
1
Fig 15
Operating the Control Unit while spraying
In order to close the entire boom, toggle the main ON/
OFF switch to the OFF position. 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 close one or more sections of the boom,
switch the relevant distribution valve to off position.
Pressure equalisation ensures that the pressure
does not rise in the sections which are to remain open.
When the sprayer is stored, the control box and the
multi plug must be protected against moisture and dirt.
A plastic bag may be used to protect the multi plug.
D
2
3
3500 / 4000 EXPLORER
Emergency Operation of EC Unit
The main ON/OFF and section valves can be manually
operated about 30 seconds after HP 3500 control panel
has last been used.
The pressure regulation valve can be operated when
the current to HARDI PILOT has been disconnected.
In case of power failure it is possible to operate all
functions of the operating unit manually. First
disconnect the multi plug from the control box. Now
manually turn the emergency control knobs.
The problem may be due to a blown fuse.
Fuse replacement:
HP 3005 power box
Fuse (HARDI ref. no. 268417) 3 Amp. Quick acting
3A Fuse
HP 3005
Fig 16
HP 3050 sprayer junction box
Fuse (HARDI ref. no. 261605) 25 Amp. Quick acting
Fuse 20A
261605
Fig 17
Remote pressure gauge (if fitted)
The remote pressure gauge measures the working
pressure in the boom tubes as close to the nozzles as
possible. This pressure reading will always be slightly
lower than the reading at the operating unit pressure
gauge (D Fig 14).
The outputs stated in the nozzle charts are always
based on the pressure measured at the nozzle.
Always adjust pressure when calibrating and spraying
according to readings at the Remote pressure gauge.
9
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