Install The Spray Tip; Set The Atomization Fluid Pressure - Graco HA1M10 Instructions-Parts List Manual

Install the Spray Tip

To reduce the risk of skin injection and splashing,
follow the Pressure Relief Procedure before
removing or installing the spray tip or air cap/tip
guard.
1. Relieve the pressure. Follow Pressure Relief Pro-
cedure, page 16.
2. Align the spray tip tab with the groove in the air cap.
Install the tip.
F . 10 Spray Tip Alignment
IG
3. Install the air cap and retaining ring. Orientate the
air cap and tighten the retaining ring securely. Be
careful not to damage the electrode.
F . 11 Install Air Cap Assembly
IG
To reduce the risk of fire, explosion, or electric
shock, never operate the gun with a damaged
electrode.
333011D
Set the Atomization Fluid
Pressure
See F 5.
IGURE
Atomization fluid pressure will vary based on the viscos-
ity of the fluid, flow rate desired, and other system char-
acteristics.
1. Turn off the turbine air (TA), atomization air (A1),
and fan air (A2).
2. Start the pump. Set the fluid regulator to 400 psi (2.8
MPa, 28 bar).
3. With the turbine air (TA), atomization air (A1), and
fan air (A2) turned off, spray a test pattern, holding
the gun 12 in. (305 mm) from the surface. Examine
the particle size. Do not be concerned about the
presence of tails; they will be removed in step 6.
4. Increase the fluid pressure in small increments.
Spray another pattern and compare the particle
size. Smaller particle size indicates improved atomi-
zation.
To reduce the risk of injury, never exceed the
maximum working pressure on the lowest rated
system component. Maximum working pressure of
this equipment is 3000 psi (21 MPa, 210 bar).
5. Continue to increase the fluid pressure and spray
test patterns. Do not exceed 3000 psi (21 MPa, 210
bar) fluid pressure. When the particle size remains
constant, the fluid is being atomized at the lowest
possible fluid pressure.
For improved atomization at lower fluid flow rates,
change to a smaller tip orifice size.
6. Turn on the atomization air (A1) and adjust the air
pressure until the tails disappear.
See Spray Pattern Troubleshooting on page 24 to
correct spray pattern problems.
7. The pattern width can also be reduced by applying
fan air pressure (A2).
Too Little Air
No Air
F . 12 Eliminating Tails
IG
Operation
Correct
Amount of Air
17