dosatron D 25 F Manual De Utilización página 24

CHANGING SEALS IN THE INJECTION ASSEMBLY (cont...)
CLEANING AND REFITTING THE SUCTION VALVE
E
N
T
Fig. 15 Fig. 16
- Turn off the water supply and allow the pressure to drop to zero.
- Unscrew the nut (Fig. 15-E) and pull downwards to remove the suction
tube (Fig. 16-T).
- Unscrew and remove the nut (Fig. 16-N).
- Pull downwards to remove the suction valve assembly (Fig. 17).
- Rinse copiously the different parts with clean water, re-assemble them
(Fig. 17).
- Put the valve back (Fig. 17-P) in the doser body (Fig. 17-D), push it in the
back.
- Check that the return spring is working.
- Re-assemble in the reverse order to the above by hand.
© DOSATRON INTERNATIONAL / 44
D
P
Fig. 17
CHANGING THE MOTOR PISTON (with pressure off)
- Turn off the water supply and allow the pressure to drop to zero.
- Take off the suction tube of product (Fig. 18 A).
- Unscrew the injection part by hand or by means of a long cruciform screw-
driver, according to the dispenser type (Fig. 18 A).
- Pull downwards to remove the dosing part (Fig. 18 C).
Fig. 18
A B C
Models
D 25 F 0.2 - RE 5 - RE 10
- Unscrew the screw-
top by hand (Fig. 19-C)
and remove it.
C
- Remove the motor
piston (Fig. 20-M) by
pulling it up.
- Change and reassem-
ble in the reverse order
to the above.
- Refit the screw-top
(take care not to dama-
Fig. 19
ge its seal) and tighten
by hand.
© DOSATRON INTERNATIONAL / 45
A B C
Models
D 25 F - F1- F 2 - RE 1500 - RE 2
M
Fig. 20