Graco Inc 312145D Pressure Relief Procedure, System Requirements, Grounding, Gun Trigger Lock

Pressure Relief Procedure

Pressure Relief Procedure

Follow this Pressure Relief Procedure whenever you are instructed to relieve pressure, stop spraying, check or service equipment, or install or clean spray tip.

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 Requirements). 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 unexpectedly.

•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 Pres- sure Relief Procedure.

Grounding

Check your local electrical code and pump/sprayer manual 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 surface. 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	Trigger
Locked	Unlocked
(no spray)	(spray)
	ti5049b	ti5048b

4 312145D