40
VERSION 01/2021
ORDER NUMBER DOC2422004
TOPFINISH Bell 1S ECH
Procedure
1. Apply bearing air (BA) at the high-speed rotary atomizer.
2. Preset pressure for bearing air to 0.55 MPa; 5.5 bar; 80 psi.
WAGNER recommends installing a pressure switch, which shuts the high-speed
rotary atomizer down automatically when the pressure falls below 0.54 MPa, 5.4 bar;
78 psi. Spindle rotation without bearing air may cause damage.
The presence of bearing air should be checked by briefly turning the spindles by
hand. If the spindle cannot be turned with ease, the bearing air setting should be
checked again.
3. Set product pressure to 0.1 MPa; 1.0 bar; 14.50 psi.
4. Put the supply system for coating product and flushing agent into operation.
5. Use solvent to check the system for leaks.
6. Flush high-speed rotary atomizer with solvent, flushing through the flushing valve
(FB).
7. Set the speed of the high-speed rotary atomizer via the external control system to
5,000–10,000 rpm and power up the high-speed rotary atomizer slowly.
8. Check whether there are any vibrations on the high-speed rotary atomizer.
9. Set speed to 25,000 rpm using external control system.
10. Set steering airs SA1 and SA2 to 0.03 MPa; 0.3 bar; 4.35 psi to prevent the spray jet
titling to the rear.
11. Open product valve.
12. Check spray jet geometry.
Notice
If the high voltage is not switched on, a turbulent (wobbling) spray pattern may
result. This effect is eliminated by switching on the high voltage.
13. Adjust spray pattern geometry if required by adjusting the pressure (0.05 MPa; 0.5
bar; 7.25 psi – 0.4 MPa; 4.0 bar; 58.02 psi).
If necessary, use a larger or smaller bell plate.
14. Calibrate spray product and solvent (for description, see Chapter
).
15. Switch on and set high voltage (20 – 100 kV).
Notice
If necessary, this optimization should be tested with another product nozzle or another
bell diameter. Verify safe operational conditions.
6.9.6 CALIBRATION
1. Remove front cover.
2. Lock spindle by pressing and holding locking button.
3. Remove bell plate with tool.
4. Slide appropriate hose onto nozzle and guide into a suitable measuring cup.
5. Switch off steering airs SA1 and SA2.
6. Depending on the size of the measuring cup, discharge product for 1 minute or
twice for 30 seconds.
7. Compare the calculated application rate with the table.
8. If the application rate is too low, you may need to use a larger bell plate.
Notice
When calibrating with flushing agent, a volume of 500 ml in 1 minute may not be exceeded.
Adjust flushing agent pressure accordingly on pressure regulator.
