International Conversions; Changing Seals In The Injection Assembly - dosatron D 45 RE 3000 Manuel D'utilisation

INTERNATIONAL CONVERSIONS

Principle : Setting at 1% 1/100 = 1 part of concentrate for 100 parts of
water.
Ex. : Setting at 2% 2/100 = 2 parts of concentrate for 100 parts of
water.
Ratio 1/50.
CHANGING SEALS IN THE INJECTION ASSEMBLY (with pressure off)
Frequency : Once per year.
IMPORTANT ! Use no tool or
metallic utensils
ADVICE : Before dismantling any
part of the injection assembly it is
advisable to operate the DOSA-
TRON, injecting clean water so as to
rinse through the injection system.
In this way, risks of contact with
concentrated solutions in the injec-
tion assembly are minimized.
During any such intervention, wear
protective eyewear and gloves !
METHOD OF REMOVING SEAL
Fig. 14 : Between finger and thumb,
pinch the component and the seal ;
push towards one side to deform the
seal.
Fig. 15 : Increase the deformation to
grip the part of the seal thus expo-
sed and pull it out of its groove.
© DOSATRON INTERNATIONAL / 40
Clean the seal seating without any
tools.
Refitting is done by hand.
It is very important that the seal is
not twisted once in place as this
would impair its efficiency.
Fig. 14
Fig. 15
CHANGING SEALS IN THE INJECTION ASSEMBLY (cont...)
CLEANING AND REFITTING THE SUCTION VALVE
N
E
T
Fig. 16
Fig. 17
- Close the water supply and let the pressure drop to zero.
- Unscrew the nut (Fig. 16-E) and pull downwards to remove the suction
hose (Fig. 17-T).
- Unscrew and remove the nut (Fig. 17-N).
- Pull downwards to remove the suction valve assembly (Fig. 17).
- Rinse copiously the different parts with clean water, re-assemble them
(Fig. 18).
- Refit the suction valve (Fig. 18-P), according to the 3 pump types, into the
injection stem (Fig. 18-D), push as far as it will go.
- Check that the return spring is working.
- Re-assemble in the reverse order to the above by hand.
NOTE : For IE models, remove the external injection hose. See
CONNECTING THE EXTERNAL INJECTION.
© DOSATRON INTERNATIONAL / 41
D
D D D
P
P
P
P
Fig. 18