Flush The Pressure Pot Before The First Use; Prime The System; Set The Fluid And Air Pressure - Graco AirPro 237413 A Series Instructions-Parts List Manual

Flush the pressure pot before
the first use
Flush with a solvent compatible to your fluid. Consult the
fluid manufacturer's literature for recommendations. See
Flushing on page 12.

Prime the system

1. Remove the pressure pot cover.
2. Place a 5 gal. (20 liter) metal pail of fluid in the pres-
sure pot, or install the pressure pot liner (supplied)
and fill it with up to 5 gal. (20 liter) of fluid.
NOTE: Order part no.15D059 for a package of 20 liners.
3. Tighten the c-clamp handles (27) securely.
4. Close the pressure pot and gun air regulators (33,
36).
5. Be sure the air relief valve (7) is closed (clockwise).
6. Be sure the pressure pot air shutoff valve (17b) is
closed (valve handle at a right angle to the valve
body), and then connect the air line (C) to the valve.
7. Open the master air valve (A).
8. Open the pressure pot air shutoff valve (17b).
9. Adjust the pressure pot air regulator (33) to 10 psi
(69 kPa, 0.7 bar).
10. Open the fluid shutoff valve (18).
11. Hold the gun against and aimed into a grounded
metal waste pail. Trigger the gun slowly. The gun
will emit air until the fluid arrives. When fluid flows
freely, release the gun trigger.

Set the fluid and air pressure

1. With the system primed and the gun air regulator air
regulator closed (36), trigger the gun and adjust the
pressure pot air regulator (33). Refer to F
available, use the pressure setting provided by your
fluid supplier. Otherwise, use the following instruc-
tions to determine the fluid pressure.
To determine the fluid pressure setting, hold the gun
parallel to the floor. (Be sure to catch the fluid in a
container.) With the gun air pressure turned off, trig-
ger the gun. Adjust the pressure pot regulator (33)
until the straight fluid stream is within the range indi-
cated for the viscosity of your fluid before it drops
off. That is your optimal pressure pot air pressure.
See F
NOTE: If you have the HVLP spray gun, do not exceed
15 psi (103 kPa, 1 bar) to maintain HVLP compliance.
Fluid Viscosity
Measured with a #2 Zahn cup
Light (18-25 seconds)
Medium (25-40 seconds)
Heavy (40-60 seconds)
1
Fluid Droop: straight
stream before fluid
drops off
F . 6
IG
Fluid Viscosity
Measured with a #2 Zahn cup
Light (18-25 seconds)
Medium (25-40 seconds)
Heavy (40-60 seconds)
1
Fluid Droop: straight
stream before fluid
drops off
F . 7
IG
. 5. If
IG
2. Release the gun trigger. Install the air cap.
3. Open the gun air shutoff valve (17a). Partially trigger
the gun so only air is emitted. Set the gun air regula-
tor (36) pressure as follows:
• HVLP Gun - 60 psi (414 kPa, 4.1 bar)
• Air Spray Gun - 65 to 90 psi (448 kPa, 4.5 bar).
. 6 and F . 7.
IG IG
Operation
Fluid Droop 1
8-10" (200-250 mm)
6-8" (150-200 mm)
4-6" (100-150 mm)
1
Air Spray Gun
ti12121a
Fluid Droop 1
4-6" (100-150 mm)
2-4" (50-100 mm)
1-2" (25-50 mm)
1
HVLP Spray Gun
ti12121a
11