Graco Inc. UNICARB Pro AA4500 - Manual (Page 5)

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Introduction
How the PRO AA4500/UNICARB
Electrostatic Air-Assisted Spray Gun
Operates
WARNING
Remember, this is not an air spray gun; for your
safety be sure to read and follow the Warnings on
pages 2 to 3 and throughout the text of this
instruction manual.
The spray tip shapes the fluid into a fan pattern.
As the gun is triggered, the regulated air is directed to
the power cartridge turbine.
The air control valve does not control pattern width. To
change pattern width, a new tip size must be used.
The ability of the PRO AA4500/UNICARB Electrostatic
Spray Gun to spray at higher fluid pressures, com-
bined with the addition of CO
2 from the UNICARB
process, provides the additional power needed to
atomize higher solids materials.
The gun’s internal power cartridge provides high
voltage current. The fluid is electrostatically charged as
it passes the gun’s electrode. The charged fluid is
attracted to the grounded object, wrapping around and
evenly coating all surfaces.
NOTE: The gun’s air control valve must be completely
turned off to have airless atomization. Closing the air
control valve does not effect the operation of the
turbine.
Power Supply’s Adjustable Lower Voltage Setting
The gun’s lower voltage setting (LO) is adjustable. The
LO setting can be adjusted from 45 to 80 kV; it is
preset by the factory at 60 kV. See page 35 to change
the setting. NOTE: The gun’s full (HI) voltage setting is
85 kV.
01947
Air Control
Valve
ES Indicator
Light
ES HI-LO
Lever ES ON-OFF
Lever
Trigger Safety
Latch
Tip Guard
(orange)
Air
Cap
(black) Spray
Tip
(orange) Retaining
Nut
Back View of Gun
01944A