Adjusting The Injection Rate; Changing The Motor Piston; Changing Seals In The Injection Assembly - dosatron D 8 RE 2 Manual De Utilización

ADJUSTING THE INJECTION RATE (with pressure off)
IMPORTANT ! Use no tool or metallic utensils.
Adjustment must be made when there is no pressure in the DOSATRON.
- Turn off the water supply and allow the pressure to drop to zero.
- Unscrew the retaining ring (Fig. 13).
- Screw or unscrew the adjusting nut in order to line up the 2 peaks of the
eyelet with the desired ratio on the scale (Fig. 14).
- Tighten the blocking ring (Fig. 15).
Fig. 13
CHANGING THE MOTOR PISTON (with pressure off)
Fig. 17
Fig. 16
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Fig. 14 Fig. 15
- Turn off the water supply and allow
the pressure to drop to zero.
- Unscrew and remove bell-housing
by hand (Fig. 16).
- Remove the motor piston (Fig. 17)
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.
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 DOSATRON, injecting clean water so as to rinse
through the injection system. In this way, risks of contact with concentrated
solutions in the injection assembly are minimized.
During any such intervention, wear protective eyewear and gloves !
METHOD OF REMOVING SEAL
Fig. 22 : Between finger and thumb, pinch the component and the seal ;
push towards one side to deform the seal.
Fig. 23 : Increase the deformation to grip the part of the seal thus exposed
and pull it out of its groove.
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. 22
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Fig. 23