Setup - Graco Alpha Plus AA Instructions-Parts List Manual

1. Connect the Air Line
NOTE:
D You must install an air pressure regulator (L) on the
gun air line to control air pressure to the gun. See
Fig. 1.
D If your regulated air source does not have a filter,
install an air filter (A) on the air line to ensure a dry,
clean air supply to the gun. Dirt and moisture can
ruin the appearance of your finished workpiece.
D Install an air pressure regulator (D) on the pump air
supply line to control air pressure to the pump.
D Install a bleed-type air shutoff valve (C) on the main
air line and on the pump air line, to shut off air to
the pump.
WARNING
The bleed-type air shutoff valve is required in your
system to relieve air trapped between this valve
and the pump after the air regulator is closed.
Trapped air can cause the pump to cycle unexpect-
edly, which could result in serious injury.
D Use a 3/16 inch (5 mm) I.D. or larger air hose to
minimize excessive pressure drop in the hose.
NOTE: The gun air inlet has a 1/4–18 npsm (R1/4–19)
compound male thread that is compatible with npsm
and bsp female swivel connectors.
A. Install an air shutoff valve (V) on each gun air sup-
ply, downstream of the gun air regulator, to shut off
air to the gun.
B. Connect the air hose (K) to the 1/4 npsm gun air
inlet.
C. Connect the other end of the air hose (K) to the
outlet of the gun air regulator (L).

Setup

2. Connect the Fluid Hose
NOTE:
D Before connecting the fluid line, blow it out with air
and flush it with solvent. Use solvent which is
compatible with the fluid to be sprayed.
D If better control of fluid pressure is needed, install a
fluid regulator (U) on the fluid line to level out fluid
pressure to the gun. See Fig. 1.
D Use of an inline fluid filter (N) is recommended to
remove coarse particles and sediment, to avoid
clogging the spray tip and causing finishing defects.
A. Connect the fluid hose (H) to the gun fluid inlet. If
desired, install a fluid swivel (W) at the gun inlet,
for best maneuverability.
B. Connect the other end of the fluid hose (H) to the
pump fluid outlet.
INJECTION HAZARD
To reduce the risk of property damage or
serious injury, including fluid injection,
which could be caused by component
rupture or unrelieved fluid pressure,
D If a plugged tip occurs, shut off the air supply to
the pump, lock the gun trigger safety, and very
slowly loosen the air cap retaining ring to
relieve pressure in the cavity between the
ball/seat shutoff and the plugged tip. Clear the
tip orifice or tip filter, if installed.
D A fluid pressure regulator (U) must be installed
in the system if the pump's maximum working
pressure exceeds the gun's maximum fluid
working pressure of 4000 psi (28 MPa, 280
bar).
WARNING
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