dosatron D3 Serie Manual De Utilización página 37

Maintenance
RECOMMENDATIONS
1 - When using soluble products
to be made up into solutions, we
recommend the periodic dismantling
of the entire dosing part (see : §
CLEANING AND REFITTING THE
SUCTION VALVE, § CHANGING
SEALS IN THE INJECTION
ASSEMBLY).
Thoroughly rinsing all the elements
of the dosing part with water and
re-assembling them after having
previously lubricated the seal
(Fig. 10) with a silicone lubricant, in
the case of difficulty in re-fitting.
2 - Before putting the DOSATRON
into operation after a non-use
period, remove the motor piston and
soak it into lukewarm water
< 40° C [104° F] overnight. This
helps to dissolve any deposits which
may have dried onto the piston
motor.
HOW TO DRAIN THE DOSATRON (in case of freezing temperature)
- Turn off the water supply and let the pressure drop to zero.
- Remove the injection assembly, see § CHANGING THE MOTOR PISTON.
- Remove the bell and the motor piston.
- Disconnect the water inlet and outlet fittings.
- Remove the lower pump body from the mounting bracket and empty any
remaining water.
- The DOSATRON can now be reassembled, having first cleaned the seal.
©
DOSATRON INTERNATIONAL S.A.S / 57
Fig. 10
O-ring
%
5
FITTING THE SUCTION TUBE
If the DOSATRON has already been
used, please imperatively refer to §
PRECAUTIONS.
- Unscrew the nut (Fig. 11)at the
bottom of the injection assembly and
put it onto the tube.
- Push the tube onto the barbed
fitting as far as it will go and screw up
the nut by hand (Fig. 12).
CHANGING THE MOTOR PISTON (with pressure off)
Fig. 14
%
5
Fig. 13
%
5
©
DOSATRON INTERNATIONAL S.A.S / 58
Fig. 11 Fig. 12
- Turn off the water supply and allow
the pressure to drop to zero.
- Unscrew and remove bell-housing by
hand (Fig. 13).
- Remove the motor piston (Fig. 14)
by pulling it up.
- Rod and plunger piston are fixed
to the motor piston and taken out
simultaneously.
- Change and reassemble in the
reverse order to the above.
- Refit the bell-housing (take care not
to damage its seal) and tighten by
hand.