Adjust The Electrostatics; Spraying; Triggering The Fluid Alone; Shutdown - Graco PRO Auto Xs Instructions-Parts List Manual

Adjust the Electrostatics

1. Shut off the fluid supply.
2. Prepare the isolation system for high voltage opera-
tion.
3. Trigger the gun, then turn on the turbine air (TA).
See F . 14..
IG
4. Refer to Table 4 to set the proper pressure at the
turbine air hose inlet when air is flowing. Do not
exceed these pressures as there is no added bene-
fit and turbine life could be reduced.
Table 4: Turbine Air Pressures
Turbine Air Air pressure at turbine air hose
Hose Length
ft (m)
15 (4.6)
25 (7.6)
36 (11)
50 (15.3)
75 (22.9)
100 (30.5)
5. Check the voltage output of the gun using a high
voltage probe and meter or by reading the ES (kV)
Display Module.
NOTE: The gun's normal high voltage reading is 45-55
kV.
See Electrical Troubleshooting on page 38 to correct
voltage problems.
309457G
inlet for full voltage
psi (bar, MPa)
54 (3.8, 0.38)
55 (3.85, 0.38)
56 (3.9, 0.39)
57 (4.0, 0.40)
59 (4.1, 0.41)
61 (4.3, 0.43)

Spraying

WARNING
Electric Shock Hazard
To reduce the risk of electric shock, do not
touch the gun electrode or come within 2 ft
(6.1 m) of the nozzle during gun operation.
1. Apply a minimum of 50 psi (3.5 bar, 0.35 MPa) air
pressure to the cylinder air fitting (CYL) to activate
the on/off sequence of atomization air (A1), fan air
(A2), and fluid (P1). See F
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 to a lower voltage setting, activate the
solenoids controlling the KV1 and KV2 ports. See
Changing the kV Setting on page 7.
WARNING
Fire and Explosion Hazard
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 29.

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 50 psi (3.5 bar, 0.35 MPa) air pressure to the
cylinder air fitting (CYL) to trigger the fluid.

Shutdown

1. Discharge the system voltage (page 21).
2. Flush and clean the equipment. See Maintenance
on page 26.
3. Relieve the pressure (page 21).
Operation
. 14..
IG
25