Changing The Dosing Seals; Changing The Motor Piston - dosatron D 25 F Manuel D'utilisation

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.

CHANGING THE DOSING SEALS

- Change the seals, the suction valve and the barbed fitting.
- to do this, please refer to the drawings of the different models at the end
of this manual.
- Change the seals once a year.
- turn off the water supply and allow the pressure to drop to zero.
- take off the suction tube of product, remove the injection assembly as des-
cribed in the previous chapter.
- Pull downwards to remove the injection assembly.
- Re-assemble in the reverse order to the above.
©
DOSatRON INtERNatIONaL / 42
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 screwdri-
ver, 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 pis-
ton (Fig. 20-M) by pulling
it up.
- Change and reas-
semble in the reverse
order to the above.
- Refit the screw-top
(take care not to damage
its seal) and tighten by
hand.
Fig. 19
© ©
DOSatRON INtERNatIONaL / 43 DOSatRON INtERNatIONaL / 43
A B C
Models
D 25 F - F1- F 2 - RE 1500 - RE 2
M
Fig. 20