Pressure Relief Procedure, Grounding, RAC Tip

Pressure Relief Procedure

Pressure Relief Procedure			Gun Trigger Lock

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 4. 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.

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.

Trigger	Trigger
Locked	Unlocked
(no spray)	(spray)
	ti5049b	ti5048b

Tip Installation

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.

RAC Tip

1.Follow Pressure Relief Procedure. Engage trigger lock.

• 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.

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.

2.Insert housing (A) through back of retaining nut (B) and pull it forward. Install metal seal (20a) in housing (A), flat side first.

3.Install tip cylinder (20c) so small orifice (X) faces front.

4.Insert tip guard (19) into place. Insert screw (20d) and tighten. Install white gasket (20b) in housing. Install assembled RAC onto spray gun.

20a

X 20c

20d 20b

•	Solvent flushing pails: follow local code. Use only conduc-
	tive 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 reliev-
	ing pressure: hold metal part of gun firmly to side of a
	grounded metal pail, then trigger gun.

Flat Tip

1.Follow Pressure Relief Procedure. Engage trigger lock.

2.Insert tip (32) and gasket (30) into back of guard (31).

3.Install guard over end of gun.

ti10051a

312145B