Operation
18
333011D
Adjust the Electrostatics
1. Turn on the turbine air (TA) and adjust the air pres-
sure per the settings in Table 1 . Set the proper
pressure at the turbine air hose inlet
when air is
flowing
.
2. Check the turbine speed of the gun by checking the
indicator light on the standard gun body or for the
smart gun check the actual turbine speed on the Pro
Xp Auto Control Module. See the following table.
Adjust the air pressure as necessary to keep the
indicator light green or the values within 400-750
Hz.
NOTE:
Smart models display values not color indicator
lights.
Check the voltage output of the gun using a high voltage
probe and meter or by reading the Pro Xp Auto Control
Module.
NOTE:
The gun’s normal high voltage reading is 60-70
kV. If a ball end high voltage measurement probe is
used, the gun voltage will rise to about 85 kV. This will
happen with all resistive electrostatic guns.
See
Electrical Troubleshooting
on page 27 to correct
voltage problems.
Spraying
1. Apply a minimum of 60 psi (4.2 bar, 0.42 MPa) air
pressure to the cylinder air fitting (CYL) to activate
the on/off sequence of atomization air (A1), fan air
(A2), and fluid (P). See F
IGURE
2.
2. Turn the gun functions on and off by using the air
solenoid valves on the cylinder (CYL) and turbine
(TA) air supply lines.
3. To change a smart model to a lower voltage setting,
see the Pro Xp Auto Control Module manual
332989.
Triggering the Fluid Alone
1. Shut off and relieve the air pressure to the atomiza-
tion (A1) and fan (A2) air lines, using the bleed-type
air shutoff valves.
2. Apply 60 psi (4.2 bar, 0.42 MPa) air pressure to the
cylinder air fitting (CYL) to trigger the fluid.
Shutdown
1. Flush the gun, see
Flushing
, page 19.
2. Follow the
Pressure Relief Procedure
, page 16.
3. Clean the equipment. See
Maintenance
on page
19.
Table 1. Approximate Dynamic Turbine Air
Pressures
Turbine Air
Hose Length
ft (m)
Air pressure at turbine air hose
inlet for full voltage
psi (bar, MPa)
15 (4.6)
54 (3.8, 0.38)
25 (7.6)
55 (3.85, 0.38)
36 (11)
56 (3.9, 0.39)
50 (15.3)
57 (4.0, 0.40)
75 (22.9)
59 (4.1, 0.41)
100 (30.5)
61 (4.3, 0.43)
Table 2. Indicator Colors/Values
Indicator
Color
Description
Green
400-750
Hz
When spraying, the indicator should remain
green, indicating sufficient air pressure to
the turbine.
Amber
<400
If the indicator changes to amber after 1
second, the air pressure is too low. Increase
air pressure until the indicator is green.
Red
>750
If the indicator changes to red after 1 sec-
ond, the air pressure is too high. Decrease
air pressure until the indicator is green.
Excessive turbine speed can shorten the
bearing life and will not increase the voltage
output.
To reduce the risk of electric shock, do not touch the
gun electrode or come within 4 in. (10 cm) of the
nozzle during gun operation.
If any fluid leakage from the gun is detected, stop
spraying immediately. Fluid leakage into the gun
shroud could cause fire or explosion and result in
serious injury and property damage. See
Check for
Fluid Leakage
on page 21.
To reduce the risk of an injury, follow the
Pressure
Relief Procedure
when you stop spraying and
whenever you are instructed to relieve the pressure.
