22
GB
8.2 REPOSITIONING OF THE MACHINE
When the machine has stopped irrigating and the valve is closed, the pipe-work remains under pressure and in order to discon-
nect the machine from the pipe-work proceed as follows.
1) Shut the hydrant supply valve off.
2) Open the breather valve manually.
3) Open the butterfly valve by the special knob in order to eliminate the remaining pressure.
4) Then close the breather valve ,disconnect the machine connection hose and proceed with moving the machine.
8.3 MAINTENANCE OF THE SHUT-OFF VALVE
1) Periodically clean the filter (fig.38).
2) At the end of the season unscrew and empty the filter.
3) Check that the butterfly valve is open and drain the water from the piston .
Fig.38
Fig.39
8.4 CAUTION
If during operation the valve on the filter is altered with (fig. 39), the piston which con-
trols the butterfly valve could shut off violently and generate water hammer or could fail
to shut the valve.
9.0 USE OF THE DISCHARGE VALVE (optional)
If the machine is equipped with a discharge valve, before starting operation proceed as
follows:
1) Take off the plug on the outlet connector of the valve (fig.40);
2) Set the machine in operation;
3) Check that at the end of the stroke, the valve is opened by the 3 way valve which dri-
ves it.
To check if the 3-way valve opens the discharge valve:
1) Push the manual disengaging rod manually and simulate the end of the working phase;
2) If the valve does not open, adjust the stroke of the control valve lever using the adju-
sting screw (fig.41).
ATTENTION:
when the discharge valve is opened water comes out suddenly and vio-
lently. Do not stay near
the outlet pipe.
Fig.40
Fig.41
DANGER
: if the machine is located near a road or a work site, make sure that the water ejected from discharge valve can not
reach persons or places of transit.
In order to avoid this kind of danger it is necessary to connect a hose to the outlet connector of the discharge valve in order to
drain the water to the ground without danger.
