Operation; Pressure Relief Procedure; How To Use The Safety Knob - Graco Series A Instruction Manual

Electrical Grounding contrinued from page 6.
3. Use only electrically conductive fluid hoses with a
maximum of 500 feet (150 m) combined hose
length to ensure grounding continuity.
4. Obtain electrical grounding continuity for the spray
gun by connecting it to a properly grounding fluid
hose and pump or sprayer.
5. Provide electrical grounding for these components
according to the local code: the fluid supply

Pressure Relief Procedure

WARNING
INJECTION HAZARD
To reduce the risk of serious injury, in-
cluding fluid injection, splashing in the
eyes or on skin, or injury from moving
parts, always follow this procedure whenever the
spray equipment is shut off, when checking or serv-
icing any part of spray system, when installing,
cleaning or changing spray tips and whenever you
stop spraying.
1. Lock the gun safety knob.
2. Shut off the power supply to the pump and open
any air bleed valves in the system.
3. Unlock the gun safety knob.
4. Hold a metal part of the gun firmly to the side of a
grounded metal waste container, and trigger the
gun to relieve pressure.
5. Lock the gun safety knob.
6. Open the pump drain valve to help relieve fluid
pressure in the pump, hose and gun. Triggering
the gun to relieve pressure may not be sufficient.
Have a container ready to catch the drainage.
7. Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray tip or hose is completely
clogged or that pressure has not been fully relieved
after following the steps above, V ERY SLOWLY
loosen the tip guard retaining nut or hose end coupling
and relieve pressure gradually, then loosen completely.
Now clear the tip or hose obstruction.
Installation
container, the object being sprayed, and all of
the solvent pails used when flushing. Use only
metal pails, which are conductive. Do not place the
pail on a non-conductive surface, such as paper or
cardboard, which interrupts the grounding continu-
ity.
6. To maintain grounding continuity when flush-
ing or relieving pressure , always hold a metal
part of the gun firmly to the side of a grounded
metal pail, then trigger the gun.

Operation

important treatment information should a fluid injec-
tion injury occur. Additional cards are available at
no charge from Graco, Inc.

How to Use the Safety Knob

To lock the safety knob (A), turn the knob fully clock-
wise; this locks the needle in the forward position. To
unlock the safety knob, turn the knob fully counter-
clockwise. See Fig. 2.
Fig. 2
WARNING
INJECTION HAZARD
The wallet-sized warning card provided
with this gun should be kept with the op-
erator at all times. The card contains
A
04884
308–626 7