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.

684019 11
Adjustments
Step 3: Trigger Height
Follow this procedure to ensure the gun triggers prop-
erly during a purge.
1. Insert the gun into the Gun Flush Box.
2. Force the cylinder triggers on by connecting air to
the Cbulkhead (K). See Fig. 9. Turn on the air to
extend both cylinders.
3. Loosen both screws (L) on the side of the box. See
Fig. 10.
Fig. 9
K
Fig. 10
L
4. Raise the gun holder (M) until the pin (N) opens
the trigger. See Figs. 11 and 12.
NOTE: Inside the gun flush box are markings for the
PRO3500, PRO4500, and Air Spray Guns. These
markings are only general guidelines of where to
position the gun holder.
Fig. 11
M
Fig. 12
N

12 684019
Adjustments
Step 4: Gun Guide
Follow this procedure to ensure the gun guide is
adjusted so the door will close completely when the
gun is in the box.
1. Insert the gun into the box.
2. Loosen the screws (J) on top of the door, then fully
close the door. See Fig. 13.
3. Slide the gun guide forward to fit snugly against the
gun body.
4. Mark the location of the screws (H), then tighten
the screws (J) in the new location. See Fig. 14.
5. Make sure the gun is secure. If the gun guide is
properly adjusted, the gun should not move easily
from side to side.
Fig. 13
J
Fig. 14
H

684019 13
Electric Controls
Gun Flush Box Controller I/O Layout for PrecisionMixSystem Retrofit
Fig. 15
STANDBY
MIX PURGE
80
81
112
122
132
142
113
123
133
143
GFB #1 TRIGGER
GFB #2 TRIGGER
GFB #3 TRIGGER
GFB #4 TRIGGER
GFB #1 ALARM
GFB #2 ALARM
GFB #3 ALARM
GFB #4 ALARM
PURGE ON
MIX ON
FLOW ON
ABORT LIGHT
HORN
85
101
45
44
43
GUN FLUSH BOX
CONTROLLER
GND
PIN01
PIN02
PIN03
PIN04
PIN05
PIN06
PIN07
PIN08
+5V
PIN09
PIN10
PIN11
PIN12
PIN13
PIN14
PIN15
PIN16
GND
DC IN
K
GND
HV01
HV02
HV04
HV05
HV06
HV07
HV08
HV09
HV10
HV11
HV12
HV13
HV14
485+
485–
HV03
110
129
139
140 111
121
131
141
PS 6
PS 7
PS 8
PS 9
AFS #1
AFS #2
AFS #3
AFS #4
GUN IN BOX #1
GUN IN BOX #2
GUN IN BOX #3
GUN IN BOX #4
80
81
100
PURGE SWITCH
MIX SWITCH
HORN ACK
CATALYST VALVE
SOLVENT VALVE
PMIX ABORT
COLOR CHANGE
37
40
42
51
1K

14 684019
Electric Controls
Gun Flush Box Typical Electrical Schematic for PrecisionMixSystem
DC COMM
CAT F OW SIG
DC COMM
DC COMM
RESIN F OW SIG
Fig. 16
6
8
SPARE
SPARE
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
6
38
37
39
40
112
122
132
142
8
6
62
8
65
8
68
8
111
121
131
141
+24VDC
RATIO ALARM
FLOW ON
MIX
PURGE
PRINT
RATIO BIT 0
RATIO BIT 1
RATIO BIT 2
RATIO BIT 3
COLOR CHANGE
POTLIFE
HIGH/LOW FLOW
TANK EMPTY
RATIO BIT 4
+24 VDC
RESIN
CATALYST
SOLVENT A
SOLVENT B
GUN FLUSH BOX 1 SOLENOID
DC COMM
+24 VDC
SO V F OW SIG
DC COMM
FLOW METER CARD
RES SIG
NOT USED
DC COMM
CAT SIG
NOT USED
DC COMM
SOL SIG
NOT USED
DC COMM
NOT USED
NOT USED
NOT USED
RED
GREEN
RED
WHITE
RED
B UE
RED
YE OW
B ACK
RED
B UE
B ACK
ORANGE
B ACK
YE OW
B ACK
BROWN
B ACK
GREEN
B ACK
RESIN SO
CATA YST SO
SO VENT A
SO VENT B
GFB 1 SO
GFB 2 SO
GFB 3 SO
GFB 4 SO
RED
RED
RED
RED
RED
RED
RED
RED
B ACK
111
121
131
141
RESIN
SENSOR
CATA YST
SENSOR
SO VENT
SENSOR
B K
B K
B K
B K
ORG
ORG
ORG
ORG
AFS #1
AFS #2
AFS #3
AFS #4
38
37
39
49
SP1
SP2
SP3
SP4
8
6
62
8
65
8
68
8
PrecisionMix Field Wiring Terminals
GUN FLUSH BOX 2 SOLENOID
GUN FLUSH BOX 3 SOLENOID
GUN FLUSH BOX 4 SOLENOID

684019 15
Setup
PrecisionMixII Controller Setup
See your PrecisionMix II system manual 308916 for
setup instructions.
Gun Flush Box Controller
570262 Setup
See Fig. 17 for the programming flow chart.
See Fig. 15 for wiring details of a typical Gun Flush
Box controller.
Time Date Set: Program the desired time and date.
Potlife Time Left: View the remaining potlife at each
gun being used.
Potlife Setup Pot Time: Enter the desired potlife time
in from 2 minutes to 999 minutes.
Default = 30 minutes
Potlife setup warning time: Set a warning time from 0
to 10 minutes to sound an optional audible alarm
before the actual potlife time expires. This alarm will
only sound if the gun with mixed material is not in the
Gun Flush Box.
Default = 0 minutes
Guns Setup –No. of Guns: Specify the total number
of guns used in the system.
Default = 1 gun
Fill Volume Setup Mixer Size: Enter the static mixer
volume.
Default = 50 cc
Fill Volume Setup G1 Fill Volume: Enter the volume
of fluid from the static mixer to the gun. This value
determines the amount of material that will dispense to
the gun during the fill sequence. Guns 1–4 each have
a user specified fill volume.
Default = 50 cc
GFB Flush Box Operation Setup Auto Operation:
Enables the Gun Flush Boxes when ON is selected.
When OFF is selected, the controller will function
normally without the Gun Flush Box operation.
Default = ON
GFB Operation Setup CC Autofill: When ON is
selected, the guns will automatically reload a new color
after flushing and color change are completed. When
OFF is selected, the operator switch must be turned to
the MIX position after a color change to load the new
color to the guns. See page 20 for the color change
sequence.
Default = OFF
Input/Output Test BK1DG: View the status of inputs
1–8. 1 = ON and 0 = OFF.
Input/Output Test BK2DG: View the status of inputs
9–16. 1 = ON and 0 = OFF.
Input/Output Test Out: Test the output functions.
1 = ON and 0 = OFF.
Warning: When this screen displays, normal operation
is disabled.
PrecisionMixController 236323 or
949724 Setup
NOTE: For more information about the PrecisionMix
system, see your PrecisionMix manual 308344 or
684029.
1. Boot the PrecisionMix controller for color change
and separate alarms.
2. Set the PrecisionMix potlife with the pendant to the
maximum limit of 999 minutes. The Gun Flush Box
controller pot life time will override this value.

16 684019
Potlife Setup Pot Time = XXX Potlife setup Warning Time= XXXXX
Fill Volume Setup Mixer Size = XX
Guns Setup No.of Guns = X
Enter Potlife timer in minutes (2–999 )
E n t e r t h e t o t a l
guns used in system
Select the Color Change AutoFill Option ON/OFF
E n t e r t h e s t a t i c mixer size (cc)
GFB Setup Rev: 1.01 Auto Oper. = XXX
Select the Auto OperationON/OFF
Fill Volume Setup G1 Fill Vol= XXXXX
Enter the hose fill volume from Static M i x e r t o g u n 1 o r desired fill amount (cc)
Fill Volume Setup G2 Fill Vol= XXXXX
Enter the hose fill volume from Static M i x e r t o g u n 2 o r desired fill amount (cc)
Fill Volume Setup G3 Fill Vol= XXXXX
Enter the hose fill volume from Static M i x e r t o g u n 3 o r desired fill amount (cc)
Fill Volume Setup G4 Fill Vol= XXXXX
Enter the hose fill volume from Static Mixer to gun 4 or desir ed fill amount (cc)
GFB Setup Rev: 1.01 CC AutoFill= XXX
Enter the Potlife War ning Ti me In minutes (0–10)
Time Date Set
date 01–15–98
Enter s System Date
Time Date Set
time 09:49:56
Input/Output Test BK1DG 00000000
Status of input 1–8
Input/Output Test BK2DG 00000000
Status of input 9–16
Input/Output Test Out 00000000000000
Status of output 1–14. Use field, up or down key to force output ON/OFF.
ITEM ITEM
ITEM
ITEM
ITEM
ITEMITEM ITEM
ITEM
MENU MENU MENU MENU
MENU
Potlife Time Left GFB1 = XXXXX
Gun Flush Box #1 potlife time left in seconds
Potlife Time Left GFB2 = XXXXX
Gun Flush Box #2 potlife time left in seconds
Potlife Time Left GFB3 = XXXXX
Gun Flush Box #3 potlife time left in seconds
Potlife Time Left GFB4 = XXXXX
Gun Flush Box #4 potlife time left in seconds
ITEM ITEM ITEM
MENU
MENU
ITEM
ITEM
ITEM
ITEM
ITEM
ITEM
Menu –Menu Key Toggles between Set–up Parameters
–Item Key Toggles within a Set–up Parameter –Field Key is used to scroll from left to right within a data entry screen
–Up/Down Keys are used to change selected data field.
–Use Help Key for further explanation
Item
Field
Help
Fig. 17
Programming Flow Chart for Gun
Flush Box Controller 570262
Enter s System Time

684019 17
(Gun triggered
& catalyst ON) or
auto–load ON?
Gun potlife timer starts
Gun potlife timer
timeout?
Gun triggered more
than 40 sec?
Reset gun potlife timer
Are all of the
guns with mixed
material loaded in gun
flush boxes?
Sound optional
horn until all
guns (with
loaded material)
are in gun flush
boxes.
Flash alarm light until done. Purge guns (with
mixed material) in order
fro m gun 1 to g un 4
YES
YES
NO
NO
YES
YES
After putting
guns in boxes,
operator puts
unit in
”PURGE”
mode
Flash alarm light until done. Purge guns (with
mixed material) in order
fro m gun 1 to g un 4
Operator puts
unit in ”MIX”
mode
Sound horn until
all guns (with
mixed material)
are in the box
and flash alarm
light.
Color Change
autofill is set
to ON and the
CC input is
ON during
purge cycle
Potlife
Warning
Option is set
O to 10 m in.
Is gun potlife
timer less than
specified warning
time?
Sound horn until
timer is reset.
(If gun is out of
box)
Gun1 triggered more
than 40 sec?
YES YES
POTLIFE MANUAL PURGE LOAD PAINT CC AUTOFILL
POTLIFE WARNING
If gun1 is in box, then
load paint to gun1 (for
the amount set for G1 fill
volume)
If there is more than 1
gun in the system, the
unit will load paint to the
remaining guns
Reset gun1 potlife timer
After done purging, the
unit loads paint to gun1
(for the amount set for
G1 fill volume)
If there is more than 1
gun in the system, the
unit will load paint to the
remaining guns
Timer
Continues
No
No, Go to Potlife
Fig. 18
Gun Flush Box Operation Logic

18 684019
Operation
PrecisionMixII Controller Operation
See your PrecisionMix II system manual 308916 for operation instructions.
Gun Flush Box Controller 570262 Operation
Operating Checklist.
Check the following list daily, before starting to operate
the system, to help ensure safe, efficient operation.
____ 1. All operators are properly trained to safely
operate the system.
____ 2. If using electrostatics, all operators are prop-
erly trained to safety operate an electrostatic
spray system. Operators must always turn off
the electrostatics (P) before placing the spray
gun in the Gun Flush Box. See Fig. 19.
____ 3. The system is thoroughly grounded and the
operator and all persons entering the spray
area are properly grounded. See Grounding,
page 7.
____ 4. The ventilation fans are operating properly.
____ 5. All the debris, including flammable liquids,
rags, and non-essential equipment, is re-
moved from the spray area.
____ 6. All flammable liquids in the spray booth are in
approved, grounded containers.
____ 7. All electrically conductive objects in the spray
area, including paint containers; Gun Flush
Boxes; and wash cans, are electrically
grounded and the floor of the spray area is
electrically conductive and grounded.
Fig. 19
P

684019 19
Operation
Gun Flush Box Controller 570262 Operation (continued)
NOTE: The following instructions are not for use with the PrecisionMix II system. See your PrecisionMix II system
manual 308916 for operation instructions.
Single Gun Flush Box
General
1. Complete the operating checklist.
2. If cleaning an electrostatic gun, turn off the electro-
statics (P). See Fig. 20.
Fig. 20
P
3. Open the Gun Flush Box door. Place the gun (Q) in
the box and close the door. See Figs. 21 and 22.
WARNING
FIRE AND EXPLOSION HAZARD
For Electrostatic Guns: To reduce the
risk of fire, explosion, or electric shock,
always turn off the electrostatics on an
electrostatic gun before placing the gun
in the Gun Flush Box.
Resetting Alarms
To reset an alarm when the alarm light is solid red, turn
the Operator Station switch from MIX to STANDBY.
See Fig. 23. See Troubleshooting, page 22.
Fig. 21
Q
Fig. 22
To reset an alarm when the alarm light is flashing (pot
life alarm), follow the Pot Life Monitor and Alarm
procedure, page 21.
NOTE: The first three PrecisionMix alarms will be reset
by the Gun Flush Box controller to prevent nuisance
alarms during flushing and loading.

20 684019
Operation
Gun Flush Box Controller 570262 Operation (continued)
NOTE: The following instructions are not for use with the PrecisionMix II system. See your PrecisionMix II system
manual 308916 for operation instructions.
Purging the System
1. Follow the General Operation instructions on
page 19.
2. Turn the Operator Switch to PURGE. The red
alarm light will flash on and off until the purge is
complete.
3. When the alarm light stops flashing, turn the Oper-
ator Switch to STANDBY.
Typical Remote Operator Station
STANDBY
MIX PURGE
Fig. 23
05122
Alarm Light
Operator
Switch
Loading the Material
1. Follow the General Operation instructions on
page 19.
2. Turn the Operator Switch to MIX.
3. The red alarm light will flash on and off until a
preset amount of mixed material is loaded through
the gun.
4. When the alarm light stops flashing, turn the Oper-
ator Switch to STANDBY.
5. When ready to spray, remove the gun from the
Gun Flush Box and close its door.
6. Turn the Operator Switch to MIX to start spraying.
NOTE: The Gun Flush Box door must be closed for the
atomizing air valve to open.
Color Change
Steps 2 to 5 must be completed within the set purge
sequence time or the old color may be reloaded or the
PrecisionMix may have an I/O error. The operator can
turn the color change autofill option OFF on the Gun
Flush Box controller. With this option off, the operator
can fill the guns by turning the Operator Switch to MIX
after the color change is complete.
1. Follow the General Operation instructions on
page 19.
2. Turn the Operator Switch to PURGE. The red
alarm light will flash on and off until the purge is
complete.
3. While the unit is purging, turn the solvent switch
ON and then press the dump valve on the color
change control box.
4. After the old resin dumps through the valve, select
the new color, then turn the solvent switch to OFF.
5. Press the dump valve again to load the new color
from the color stack to the PrecisionMix manifold.
6. The Gun Flush Box controller will purge the mixed
material and load the new color to a preset vol-
ume.
7. When the alarm light stops flashing, turn the Oper-
ator Switch to STANDBY.
8. When ready to spray, remove the gun from the
Gun Flush Box and close its door.
NOTE: The resin dump valve must be activated to
automatically load the new color.
9. Turn the Operator Switch to MIX to start spraying.
NOTE: The Gun Flush Box door must be closed for the
atomizing air valve to open.