©
DOSATRON INTERNATIONAL S.A.S /
31
©
DOSATRON INTERNATIONAL S.A.S /
32
EN
CHANGING THE MOTOR PISTON (unpressurised)
Before any maintenance on the DOSATRON,
it is essential to refer to the § PRECAUTIONS.
Before dismantling, and to avoid any contact
with the products dosed, operate the
DOSATRON by aspirating clear water to rinse
the dosing pump.
- Close the water inlet and reduce the pressure
to zero by opening the fast priming valve
situated downstream of the Dosatron.
- Unscrew the top cap manually
(Fig. 30)
and
remove it.
- Remove the motor piston
(Fig. 31)
by pulling
upwards.
- The dosing piston follows the motor piston
upwards.
- Change and refit the assembly in the reverse
order.
- Refit the top cap taking care not to damage its
seal and screw it on manually.
Troubleshooting
SYMPTOM
CAUSE
SOLUTION
Motor piston
DOSATRON does
not start or stops
Check your water inlet
(no water consumption
by the animals, supply
failure, clogged filter,
Dosatron By-pass valves
improperly positioned,
etc.)
Open the rinsing/fast
priming valve situated
downstream of the
Dosatron to test the water
supply and the operation of
the dosing pump.
Very low flow/pressure.
Check that your installation
has a sufficient minimum
pressure.
Important:
when the water
flow is very low, the Dosatron
motor may require several
minutes to complete a full
cycle. (characteristic clack of
the motor)
Motor piston blocked.
Bleed the dosing pump by
opening the clear water and
fast priming valves situated
downstream and upstream
of the Dosatron and then
dismantle the top cap in
order to access the motor
piston. Test the motor piston
by hand. Action the valve
mechanism by pressing the
vertical pushbutton until you
hear the click of the valves
being switched on.
Presence of air in the
DOSATRON.
Bleed the air using the bleed
found on the top cap > useful
under extremely low water
flow and pressure conditions.
Overflow.
1. If overflows are frequent,
consider a Dosatron with a
higher capacity.
2. Check that the motor piston
seals are present.
Motor piston is broken.
Return the DOSATRON to
your distributor.
Fig. 30
Fig. 31
CLEANING AND REFITTING THE SUCTION VALVE
Before any maintenance on the DOSATRON,
it is essential to refer to the § PRECAUTIONS.
Before dismantling, and to avoid any contact with
the dosed products, operate the DOSATRON by
aspirating clear water to rinse the dosing pump.
- Close the water inlet and reduce the pressure
to zero by opening the fast priming valve situated
downstream of the Dosatron.
- Remove the suction hose (see §
DISMANTLING THE SUCTION HOSE)
- Unscrew the suction valve nut
(Fig. 28)
.
- Release the suction valve by pulling it
downwards in the axis of the dosing part
- Thoroughly rinse the various parts of the valve
using clear water.
- As indicated in the diagram
(Fig. 29)
.
- Refit the assembly in the reverse order. Be
careful that the valve seal is refitted in the right
direction.
Fig. 28
Fig. 29