Graco Inc. 224-094 Paint Sprayer User Manual


 
10 308-084
OPERATION
Adjusting the Turbine Air Pressure
WARNING
The fan and atomizing air MUST be on before
turning on the turbine air . Actuating the turbine
air
without fan and atomizing air flow could damage
the gun and may create hazardous operating
conditions
and result in serious injury and property
damage.
1. Complete all the checks under the Operating
Checklist
on page 9.
2. Make
sure the fan and atomizing air are on, then turn
the
turbine air (electrostatics) on.
3. The
turbine air pressure should be adjusted to 40 psi
(2.8 bar) at the gun manifold inlet when air is flowing.
The
gun may be operated at a lower air pressure, but
some
voltage loss could occur
. Do not exceed 50 psi
(3.5 bar) air pressure as there is no added benefit
and
turbine life could be reduced.
4. Check
the gun electrostatics display module, if used,
to
see the voltage and current output levels.
NOTE:
The gun’
s normal high voltage output is 60 to 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 the
Electrical T
roubleshooting Chart on page 15
to correct voltage problems.
Activating the Voltage Select (KV HI/LO)
To change the voltage to the lower setting, activate the
voltage select function (KV HI/LO). The lower voltage
setting
is factory set to 60 kilovolts at zero microamperes.
To
change this setting, see page 25.
The valve used to activate the KV HI/LO switch must
bleed
the air out of the line for the switch to draw back
to
the
high setting.
MAINTENANCE
WARNING
To
reduce the risk
of serious bodily injury
, including
splashing
in the
eyes or on the skin or electrostatic
shock, always follow the Pressure Relief Proce-
dure Warning on page 9 when shutting of f the
system,
when you
stop spraying and before check
-
ing, servicing, installing, cleaning or changing any
part
in the system.
CAUTION
Clean all parts with a non-conductive solvent,
compatible with the fluid being sprayed. Conduc-
tive
solvents can cause the gun to malfunction.
Methylene chloride
is not recommended as a
flushing
or cleaning solvent with this gun as it will
damage nylon components.
Immersing
the gun
in solvent is not recommended
as
a
cleaning method. Solvent left in gun passages
could
result in a poor quality paint finish and may
draw current and reduce the electrostatic ef fect.
Solvent
in the power supply cavity can reduce the
alternator
life.
Daily Care and Cleaning
1. Clean
the fluid and air line filters daily
.
2. Clean the outside of the gun daily with a soft cloth
dampened
in a compatible solvent.
3. Clean the air cap and fluid nozzle daily , minimum.
Some applications require more frequent cleaning.
Replace
the fluid nozzle and air cap if they are dam
-
aged.
See
Clean the Air Cap and Fluid Nozzle
.
4. Check the electrode wire. Straighten if bent, and
replace if broken or damaged. See Replacing the
Electrode
Needle
.
5. Check for any fluid leakage from the gun and fluid
hoses.
See
Check for Fluid Leaks.
6. Check all of the work hangers for material build-up;
clean
them if necessary
.
WARNING
To
reduce the risk of fire, explosion, or electrostatic
shock, BE SURE the turbine air (electrostatics) is
off
before flushing the gun or
any part of the system.
7. Flush the fluid passages by alternating solvent and
air.
Flush before
changing colors and whenever you
are
done operating the gun.