Warnings; Introduction - Graco PRO AA4500 Instructions-Parts List Manual

Introduction
How
the PRO AA4500 Electrostatic
Air-Assisted Airless Spray Gun Operates
WARNING
safety be sure to read and follow the Warnings on
Remember, this is not an air spray gun; for your
pages
2
to
4
and throughout the text of this
instruction manual.
The air-assisted airless spray gun combines airless
fluid into a fan pattern, as does a conventional airless
and air spraying concepts. The spray tip shapes the
spray tip. Air from the air cap further atomizes the
fluid and completes the atomization of the paint tails
into the pattern to produce a more uniform pattern.
As the gun is triggered, the regulated air is directed to
the air cap for the air-assist function and air is also
directed to the power cartridge turbine.
The regulated air that is directed to the air cap can be
further controlled using the gun's air control valve.
This valve can be used to restrict air flow to the air
cap while maintaining sufficient air flow to the turbine.
To change pattern width, a new tip size must be used.
The air control valve does not control pattern width.
The ability of the
PRO
AA4500
Electrostatic Spray
Gun to spray at higher fluid pressures provides the
additional power needed to atomize higher solids
materials.
The gun's internal power cartridge provides high volt-
age 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 can be completely
turned off to have airless atomization if desired.
Clos-
ing 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
the setting. NOTE The gun's full (HI) voltage setting
preset by the factory at 60 kV. See page 34 to change
is
05
kV.
This full-featured power supply includes a radio fre-
Model
236-031,
with Full-Featured Power Supply
quency (RF) transmitter. The transmitter sends a sig-
nal to a hand held spray voltage readout monitor,
called an SVR. The SVR readout is the actual spray
voltage. A jumper pin is provided with the SVR and
the gun will transmit a signal. See ACCESSORIES to
must be installed in the gun's power supply before
order the SVR.
Model
236-030,
with Basic Power Supply
The basic power supply provided with Gun Model
236-030
does not include the RF transmitter
capability.
ES lndlcator
Llght
I
Alr Control
ES
ON-OFF
Lever
ES
HI-LO
Lever
Back
View
of
Gun
o w