Graco Gun Flush Box 570046 Operation manual

Instructions – Parts List
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 1998, Graco Inc. is registered to I.S. EN ISO 9001
Gun Flush BoxtModule
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Part No. 570046
684019 rev.G
Read warnings and instructions.
See page 2 for Table of Contents.
Parts

2 684019
Table of Contents
Warnings 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enclosed Waste Container 7. . . . . . . . . . . . . . . . . . .
Grounding 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Installation Drawing 8. . . . . . . . . . . . . . . . . .
Connect Tubing to the Pneumatic Controls 9. . . . .
Adjustments 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lid Switch 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gun Switch 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger Height 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gun Guide 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric Controls 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PrecisionMixII Controller Setup 15. . . . . . . . . . . .
Gun Flush Box Controller 570262 Setup 15. . . . . .
PrecisionMix Controller
236323 or 949724 Setup 15. . . . . . . . . . . . . . . . . . .
Programming Flow Chart for Gun Flush Box
Controller 570262 16. . . . . . . . . . . . . . . . . . . . . . . . .
Gun Flush Box Operation Logic 17. . . . . . . . . . . . .
Operation 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PrecisionMixII Controller Operation 18. . . . . . . . .
Gun Flush Box Controller 570262 Operation 18. .
Troubleshooting 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 28. . . . . . . . . . . . . . . . . . . . . .
Graco Information 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

684019 3
WARNING
FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD
Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and
result in fire, explosion, or electric shock, which can result in serious injury.
Ground the equipment and the object being sprayed. See Grounding on page 7.
Provide fresh air ventilation to avoid the buildup of flammable fumes from solvent or the fluid being
sprayed. Never operate the Gun Flush Box unless ventilation fans are operating.
Extinguish all the open flames or pilot lights in the spray area.
Do not smoke in the spray area.
Keep the spray area free of debris, including solvent, rags, and gasoline.
Do not turn on or off any light switch in the spray area while operating or if fumes are present.
Do not operate a gasoline engine in the spray area.
If there is any static sparking while using the equipment, stop spraying immediately. Identify and
correct the problem.
Electrostatic Gun Safety
Do not flush the system with the gun electrostatics turned on.
Interlock the gun turbine air supply to prevent operation of the power supply during flushing.
Do not turn on the gun electrostatics until all solvent is removed from the system.
When cleaning, flushing, or purging electrostatic equipment, use solvents that comply with your
local regulations. For countries following the U.S. National Fire Protection Association (NFPA) 33
requirements, use solvents with a flash point higher than 100F (38 C) or a solvent normally
used in spray operations. For European Countries complying with EN 50053, use solvents with a
flash point as high as possible and higher than the ambient temperatures.
PRESSURIZED EQUIPMENT HAZARD
Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin
and cause serious injury.
Do not bypass the Gun Flush Box interlock sensors. They prevent the Gun Flush Box from operat-
ing unless the gun is in position and the door of the box is locked.
Connect an interlock to prevent atomizing air from turning on during flushing.
Do not stop or deflect fluid leaks with your hand, body, glove, or rag.
Tighten all the fluid connections before operating the equipment.
Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.

4 684019
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction, or start unexpectedly and result
in serious injury.
This equipment is for professional use only.
Read all instruction manuals, tags, and labels before operating the equipment.
Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Check the equipment daily. Repair or replace worn or damaged parts immediately.
Do not exceed the maximum working pressure of the lowest rated system component. This equip-
ment has a 100 psi (0.7 MPa, 7 bar) maximum air inlet pressure.
Route the hoses away from the traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose Graco hoses to temperatures above 180F (82C) or below –40F (–40C).
Use only Graco approved hoses.
Use fluids or solvents that are compatible with the equipment wetted parts. See the Technical Data
section of all the equipment manuals. Read the fluid and solvent manufacturer’s warnings.
Wear hearing protection when operating this equipment.
Comply with all applicable local, state and national fire, electrical and other safety regulations.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause serious injury or death if splashed in the eyes or on the
skin, swallowed, or inhaled.
Know the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
Wear the appropriate protective clothing, gloves, eyewear and respirator.

684019 5
Introduction
How the Gun Flush Box Works
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
For Electrostatic Guns: To reduce the
risk of fire, explosion, or electric shock:
In addition to following the warnings
on page 3, read your electrostatic
gun manual for additional warnings
and instructions on the safe use of an
electrostatic gun. If you do not have a
copy of this manual, please contact
your local Graco distributor.
Always turn off the electrostatics before placing
the gun in the Gun Flush Box and whenever you
stop spraying.
WARNING
FIRE AND EXPLOSION HAZARD
In multiple gun systems: For your
safety, each gun must be used only with
its corresponding Gun Flush Box for the
interlocks to work. For example: With a
two gun system, placing gun #1 into Gun
Flush Box #2 will shut off the atomization air for
gun #2 and leave the atomization air on for gun #1
during purging.
Features
When used with a PrecisionMix or a PrecisionMix II
system, the Gun Flush Box operates with a controller
to automatically flush manual guns into an enclosed
waste container. The advantages of using the Gun
Flush Box instead of conventional flushing methods
include:
Reduced solvent use
Reduced VOC (volatile organic compounds) emis-
sions
Improved operator safety during flushing
The Gun Flush Box controller flushes the exact amount
of solvent required to clean the system. It reduces
VOCs by preventing solvent from being atomized
during the flush cycle.
Traditional flushing procedures expose the operator to
atomized solvent and accidental gun discharge. The
Gun Flush Box contains the solvent and prevents
accidental gun triggering with safety interlocks.
The interlocks will only allow atomizing air to the gun
when the gun is out of the Gun Flush Box and the door
of the box is closed. If a switch fails or if system air is
shut off, the atomizing air will be shut off to the gun.
Operation
NOTE: If using an electrostatic gun, the operator must
turn off the electrostatics before placing the gun in the
box.
The operator places the gun in the Gun Flush Box and
closes the door. The Gun Flush Box interlocks turn off
the atomizing air to the gun to prevent the solvent from
being atomized and to ensure a PROgun electro-
static turbine will be off when the operator starts flush-
ing.

6 684019
Installation
Typical Installation
Refer to the typical installation drawing in Fig. 4, page
8, as a guide for installing the Gun Flush Box. Contact
your Graco distributor for an actual system design.
Ventilation
WARNING
TOXIC OR FLAMMABLE FUMES
HAZARD
To avoid hazardous concentrations of
flammable or toxic fumes, install the Gun
Flush Box in a properly ventilated spray
booth. Never operate the Gun Flush Box
unless ventilation fans are operating.
Electrically interlock the Gun Flush Box air supply with
the ventilators to prevent the box from operating when
ventilating fans are not operating. Check and follow all
National, State, and Local codes regarding air exhaust
velocity requirements.
Location
Locate the Gun Flush Box in an area easily accessible
to the operator and away from the spray or application
point, to help avoid getting over-spray on it.
Mounting
The Gun Flush Box can be wall, stand, or drum moun-
ted in the spray booth. Install the gun flush box(es),
using the mounting holes as a template. See Fig. 1 for
dimensions. Make sure the mounting surface will
withstand the weight of the Gun Flush Box, hoses, and
the stress of operation.
Depth: 9 in.
(229 mm)
Fig. 1
14 in.
(356 mm)
9 in.
(229 mm)

684019 7
Installation
Enclosed Waste Container
WARNING
TOXIC FLUID HAZARD
To reduce the risk of splashing, a minimum of two
feet (0.6 m) of straight plastic or grounded metal
pipe or tubing must be connected between the Gun
Flush Box and an enclosed waste container for the
solvent.
Connect two feet (0.6 m) of straight plastic or grounded
metal pipe or tubing (T) between the Gun Flush Box
fluid outlet (O) and an enclosed waste container (W).
See Fig. 2.
Fig. 2
O
T
W
Grounding
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
To reduce the risk of fire, explosion, or
electric shock, the system must be
properly grounded. Follow the warnings
on page 3. Ground the Gun Flush Box
and waste container as instructed below.
Ground your system as instructed in the
manuals included with your equipment.
Gun Flush Box: Connect a ground wire to the ground-
ing lug (A) on the box. Connect the ground clamp to a
true earth ground. Refer to Fig. 3.
Waste Container: Connect a ground wire and clamp
between the waste container and a true earth ground.
Refer to Fig. 4.
Spray Gun: See your gun instruction manual.
Flammable Liquids in the spray area must be kept in
approved, grounded containers. Do not store more
than the quantity needed for one shift.
Fig. 3
A

8 684019
Installation
Typical Installation of Gun Flush Box in PrecisionMix System
Fig. 4

684019 9
Installation
Connect Tubing to the Pneumatic Controls
Fig. 5 shows the bottom of the Gun Flush Box. The
four bulkhead fittings are labeled:
P = Supply air in
A = Return air (for the gun in the box)
C = Gun trigger cylinders air (activates the gun trigger)
S = Safety interlock (locks out the atomizing air)
See Fig. 6 for detailed information on the Gun Flush
Box internal pneumatics.
Fig. 5
BOTTOM VIEW
1. Connect a 5/32”(4 mm) OD tube between the air
supply and the Pbulkhead. Use a clean, dry air
supply; filtered to 10 microns.
WARNING
EQUIPMENT MISUSE HAZARD
Do not exceed 100 psi (0.7 MPa, 7 bar)
maximum air pressure.
INSTRUCTIONS
2. Connect a 5/32”(4 mm) OD tube between the A
bulkhead and the return air input on the controller.
See Fig. 6.
3. Connect a 5/32”(4 mm) OD tube between C
bulkhead and the gun trigger solenoid output on
the solenoid box or the Gun Flush Box control box.
See Fig. 6.
Fig. 6
A
TYPICAL TWO-GUN PNEUMATIC SCHEMATIC

10 684019
Adjustments
Step 1: Lid Switch
Loosen the jam nuts (C) and remove the pneumatic
tubing. Thread the switch (B) up or down until the ball
is even with the Gun Flush Box side plate (D). See
Fig. 7.
Fig. 7
B
C
D
Switch (B) senses when cover is closed.
Step 2: Gun Switch
Loosen the jam nut (F). See Fig. 8. Remove both tubes
(G). Thread the switch (E) in or out until the end of the
switch is even with the plastic gun guide and the ball of
the switch extends out about 1/16”(1.6 mm).
Fig. 8
E
F
G
Switch (E) senses when gun is in the box.