ProMinent delta General Operating Instructions page 18

Start up
Draining the liquid end
Filling the liquid end
18
7. Start up the relief valve in the system.
8. Start up the system.
9. Set the precise dosage -
on page 19 .
10. After 24 operating hours: Tighten the screws on the dosing head -
see below for starting torque.
With feed chemicals that may not come into contact with water.
1. Turn the pump downwards using the pressure connector.
2. Allow water to flow out of the liquid end.
3. Flush the suction connector from above with a suitable medium or
blast with compressed air.
With liquid ends without bleed valves:
1. Connect the suction line to the liquid end but not yet to the dis‐
charge line.
2. Connect a short, transparent section of tubing to the discharge
valve.
3. Switch on the metering pump and allow to work at maximum stroke
length and stroke rate until some feed chemical becomes visible in
the short section of tubing.
ð The liquid end has been filled completely without bubbles.
4. Switch off the metering pump.
5. Connect the discharge line to the liquid end.
ð The metering pump is ready for operation.
With liquid ends with bleed valves (not SEK):
1. Connect the suction and discharge line to the liquid end.
2. Connect the return line.
3. Open the bleed valve by turning the star-shaped handle in a
counter-clockwise direction.
ð You can now bleed the pump using the return line.
4. Switch on the metering pump and allow to work at maximum stroke
length and stroke rate until some feed chemical becomes visible in
the return or discharge line.
ð The liquid end has been filled completely without bubbles.
5. Switch off the metering pump.
ð The metering pump is ready for operation.
With self-bleeding metering pumps (SEK type):
The return line is connected to the vertical valve on the
–
top of the liquid end. It is labelled with a red sleeve from
factory.
The discharge line is connected to the horizontal valve.
–
1. Switch on the metering pump and allow to work at maximum stroke
length and stroke rate until some feed chemical becomes visible in
the return or discharge line.
ð The liquid end has been filled completely without bubbles.
Ä 'Setting the precise dosage'