Etatron DLX User Manual

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4.0 - MAINTENANCE
1. Periodically check the chemical tank level to avoid the pump operating without liquid. This would not dam-
age the pump, but may damage the process plant due to lack of chemicals.
2. Check the pump operating condition at least ever y 6 months, pump head position, screws, bolts and seals;
check more frequently where aggressive chemicals are pumped, especially:
- pulse and power L.E.D.;
- the additive concentration in the pipework; a reduction of this concentration could be caused by the wear-
ing
of the valves, in which case they need to be replaced (Fig. 10) or by the clogging of the filter which then
has to be cleaned as in point 3 here below .
WARNING: to tightening the four screws, use
a dynamometric screw driver, set the torque
wrench
to 1,8N x m.
Fig. 10
3. The Company suggests periodically cleaning off the hydraulic par ts (valves and filter). W e cannot say how
often this cleaning should be done as it depends on the type of application, we also cannot suggest what
cleaning agent to use as this will depend on the additive used.
Operating suggestions when dosing sodium hypochlorite (most frequent case):
a - disconnect the pins from the mains or by means of a onnipolar switch with 3 mm minimum distance between
the
contact.
b - disconnect discharge hose from pipework;
c - remove the suction hose (with filter) from the tank and dip it into clean water;
d - switch on the metering pump and let it operate with water for 5 to 10 minutes;
e - switch OFF the pump, dip the filter into a hydrochloric acid solution and wait until the acid finishes clean-
ing;
f - switch ON the pump again and operate it with hydrochloric acid for 5 minutes in a closed-circuit, with suc-
tion
and discharge hose dipped into the same tank;
g - repeat the operation with water;
h - re-connect the metering pump to the pipework.
5.0 - HOW TO OPER A TE WHEN DOSING SULPHURIC ACID (MAX 50%)
In this case it is essential to bear in mind the following:
1. replace PVC cr ystal suction hose with polyethilene discharge hose;
2. empty any residual water from the pump head beforehand.
Wa r ning: if the water mixes with sulphuric acid it can produce a large quantity of gas with consequent over-
heating
of the area causing damage to valves and pump head.
This operation can also be done with the pump disconnected from the plant by turning the pump upside-down
for 15 to 30 seconds and without connecting the hose to the nipples; if impossible, dismount and remount the
pump head (Fig. 10) using the four mounting screws.
DosingPump.ir

Etatron DLX Specifications

General

Protection Degree	IP65
Display	LCD
Power Supply	24 VDC
Material	Stainless steel
Light Source	LED
Detector	Photodiode