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Connect the High Voltage Control
An electrical signal is required to actuate the normally
closed, 3-way air solenoid valve (P). The air solenoid
valve opens the cylinder air to the actuator, which opens
the fluid needle, allowing the fluid to spray. The same
signal
(W)
that actuates the air solenoid valve actuates a
relay (T). A set of contacts from this relay is connected
to the
120 KV
Power Supply. This allows the High
Voltage to be turned on and off automatically.
Connect the Fluid Line
Before connecting the fluid line
(N),
blow it out with air,
and flush it with solvent. Be sure the solvent you use is
compatible with the fluid to be sprayed.
Connect the fluid line (PTFE) from the outlet of the pump to
the 1
/8 ~ube
Fitting inlet of the gun. Install a fluid filter (EE)
and drain valve (FF) at the pump outlet. The drain valve
assists in relieving fluid pressure in the displacement
pump, hose and gun. See Bleed-Type Air Shutoff Valve
and
~Iuid
Drain Valve Required, Warnings Section. Install
a flUid regulator (R) between pump and gun to control fluid
pressure to the gun.
Color Change/Circulating System Option
Remove the plug (13) and o-ring (66) from one side of
the gun barrel, and install a 1/4 npt(f) elbow (see Ac-
cessories Section) in the gun barrel inlet.
KEY
13
Plug
88
O-Ring
Fig 3 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
...------WARNING - - - - - - - .
Do not use metal fittings at the gun head. Metal
fittings can cause sparking and result in fire or ex-
plosion and cause serious bodily injury.
For color change, connect a fluid line to the elbow.
Remove the fluid tube assembly and install a flushing
valve (see Accessories Section) in the gun barrel fluid in-
let. Connect the fluid flushing line to the flushing valve.
Connect an air line to actuate the flushing valve.
For a circulating system, connect the fluid return line to
the elbow.
OPERATION
...------WARNING - - - - - - - .
For Your Safety, always follow the Pressure
Relief Procedure on page 2 when shutting off
the system, when you stop spraying, and before
checking, servicing, installing, cleaning or chang-
ing any part in the system.
Operating Checklist
Check the following list daily, before starting to operate
the system, to help assure you of safe, efficient
operation.
_ 1. Be sure all operators are properly trained to safely
operate an electrostatic air spray system.
_ 2. Be sure all operators are trained how to properly
and completely relieve system pressure.
_ 3. Be sure the system is thoroughly grounded. See
FIRE OR EXPLOSION HAZARD on page 3, and
Check the Electrical Grounding on page 5.
_ 4. Be sure the operator and all persons entering the
spray area are properly grounded.
_ 5. Be sure ventilation fans are operating properly.
_ 6. Be sure the workpiece hangers are clean and
grounded. Contact points must be sharp points
or knife edges.
_ 7. Be sure all refuse is removed from spray booth.
_ 8. Be sure all flammable liquids in the spray booth
are in approved, grounded containers.
_ 9. Be sure all conductive objects within 6 m (20
ft)
of the gun- are electrically grounded and the floor
of the spray area is electrically conductive and
grounded.
6 307-896
Filter the Fluid
Filter the fluid to remove coarse particles and sediment
which could clog the spray tip.
Adjust the Spray Pattern
This gun can atomize many fluids with different
viscosities and at various flow rates. Follow these steps
to establish the correct fluid flow and air flow:
1.
Set the atomizing air pressure at 2 bar (30 psi) and
fluid pressure at 0.25 bar (3 to 4 psi).
2.
Choose the correct fluid tip and air cap combination
for your application. (See the Air Cap Consumption
and Fluid Tip Flow Rate Chart), page 15. Both flow
rate and viscosity must be considered. A 1.2 mm
(0.047 in.) fluid tip is furnished with the gun.
3.
Turn on the High Voltage Power Supply.
4.
Adjust the fluid flow by using the fluid pressure
regulator installed in the fluid line. (See Accessories
Section).
5.
For fine adjustment, use the fluid adjusting screw
(39) located at the rear of the gun. See Fig 4. Turn
the knob clockwise to reduce the amount of fluid
being sprayed, and counterclockwise to increase
the amount being sprayed.
6.
Use an air pressure regulator to adjust the pressure
for the desired degree of atomization. Always use
the lowest air pressure possible for most efficiency.
7.
Use the fan valve (57) to change the shape of the
spray pattern. See Fig 4. Turn fan valve knob
counterclockwise for a wide pattern and clockwise
for a solid, round pattern.
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