Changing The Dosing Seals; Reference Designation; Troubleshooting - dosatron D 25 F Manual De Utilización

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.

Reference Designation

REF.
Serial #
REF.:...................................................................... Serial #: ..........................................................
EXAMPLE D 25... IE
Type of DOSATRON
IE : External Injection
BP : integrated by-pass
V : Viscous Products
(200-400 cSt)
AO : Organic Acid
Dosing Seals:
AF = Advised for alkalines concentrates PH 7-14
VF = Advised for acides concentrates PH 1-7
Couleur : - = Blue
P = White
R = Red
V = Green
J = Yellow
O = Orange
Others extensions (consult us)
© DOSATRON INTERNATIONAL / 46
BP V AO AF P ii

Troubleshooting

SYMPTOM CAUSE
Motor piston
DOSATRON does Piston stalled
not start or stops Air has not been
bled from unit
Maximum flow
exceeded.
Motor piston
is damaged
Injection
Water flowing back Contaminated, worn,
into concentrate or missing check
container valve parts
No suction of The piston motor
concentrate has stopped
Air leak (inlet) in the
suction tube
Blocked suction
tube or clogged
strainer
Missing or worn
suction check valve seal
Missing or worn
plunger seal
Worn injection stem
© DOSATRON INTERNATIONAL / 47
SOLUTION
Reset piston, by hand
Bleed air from unit,
by bleed button
1. Reduce flow,
restart unit
2. Unscrew the top cap.
Take off the piston and
check piston valves
seals to ensure correct
position
Return unit to your
service center for repair
Clean or replace it
See Motor piston section
Check the tightness bet-
ween nut and suction hose
Clean or replace it
Clean or replace it
Clean or replace it
Replace it