Pressure Relief Procedure; Gun Trigger Lock; System Requirements - Graco XTR 5 Instructions Manual

Pressure Relief Procedure

Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief Pro-
cedure when you stop spraying and before cleaning,
checking, or servicing the equipment.
1. Engage trigger lock.
2. Shut off pump.
3. Disengage trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage trigger lock.
6. Open fluid drain valve (see System Require-
ments). Leave drain valve open.
If pressure is not fully relieved:
• Spray tip is clogged. For RAC tip, see Cleaning
Tips/Clearing Clogs, page 6. For flat tip, slowly
loosen tip guard retaining nut to relieve pressure.
Remove and clear tip.
• Hose is clogged. Slowly loosen hose end coupling
to relieve pressure. Clean hose obstruction.

System Requirements

• Install a bleed-type master air valve on a pneumatic
pump air supply line to relieve air trapped between
this valve and pump after air regulator is shut off.
Trapped air can cause the pump to cycle unexpect-
edly.
• Install a fluid drain valve between the pump and gun
to relieve pressure in displacement pump, hose,
and gun. Triggering to relieve pressure may not be
sufficient. See Pressure Relief Procedure.
4
Grounding
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
Check your local electrical code and pump/sprayer man-
ual for detailed grounding instructions.
• Spray gun: ground through connection to a
grounded fluid hose and pump/sprayer.
• Fluid hose: use only grounded hoses.
• Fluid supply container: follow local code.
• Object being sprayed: follow local code.
• Solvent flushing pails: follow local code. Use only
conductive metal pails placed on a grounded sur-
face. Do not place pail on a nonconductive surface,
such as paper or cardboard, which interrupts
grounding
continuity.
• To maintain grounding continuity when flushing or
relieving pressure: hold metal part of gun firmly to
side of a grounded metal pail, then trigger gun.

Gun Trigger Lock

To prevent injury when the gun is not in use, always
engage the gun's trigger lock if unit is being shut
down or left unattended. A wallet-sized warning card
with important injection treatment information is
included with the gun. Additional cards are available
at no charge. Provide a card to all operators.
The trigger lock must move freely, and easily snap
into a locked position. If the trigger lock is damaged or
movement is restricted, replace with new trigger kit
(16) immediately.
Trigger
Locked
(no spray)
Trigger
Unlocked
(spray)
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