16. Check that the ES indicator (Hz indicator on
Smart guns) is lit, or check that the kV indicator
on the isolated enclosure reads 30–50 kV.
The actual spraying voltage for AA waterborne
systems is 40–50 kV, but because the charging
electrode does not directly contact the fluid, the
voltage measured by the WB3000 kV meter will
be 5–10 kV lower. See the following table.
Table 2 . LED Indicator Colors
Indicator
Color
Description
Green
When spraying, the indicator
should remain green, indicating
sufficient air pressure to the
alternator turbine.
Amber
If the indicator turns amber after
1 second, the air pressure is too
low. Increase air pressure until
the indicator is green.
Red
If the indicator turns red after 1
second, the air pressure is too
high. Decrease air pressure until
the indicator is green.
17. Set the gun air regulator to deliver a minimum of
45 psi (0.32 MPa, 3.2 bar) at gun when triggered,
to ensure full spraying voltage. See the table
below.
Table 3 . Pressure Drop
Air Hose
Length in ft (m)
(using 5/16 in. [8
mm] diameter hose)
Air Regulator Setting
in psi (MPa, bar)
[with gun triggered]
15 (4.6)
52 (0.36, 3.6)
25 (7.6)
57 (0.40, 4.0)
50 (15.3)
68 (0.47, 4.7)
75 (22.9)
80 (0.56, 5.6)
100 (30.5)
90 (0.63, 6.3)
18. Turn the atomizing air adjustment valve
counterclockwise until any tails disappear.
19. If desired atomization is not achieved, change
the tip size. The smaller the tip orifice, the finer
the atomization.
20. Spray a test piece. Examine the edges
for coverage. If wrap is poor, see
.
NOTE: If a narrower pattern is needed occasionally,
open the fan air adjustment valve slightly. (Excessive
fan air flow can cause paint buildup on the air cap.)
Shutdown
1. Discharge the system voltage. See
Discharge and Grounding Procedure, page 25
.
2. Flush the gun. See
3. Follow the
Pressure Relief Procedure, page 26
.
4. Hang the gun from its hook, with the nozzle
pointing down. Be sure to keep the gun from
grounding out.
30
3A2497C
