Graco 333011B User Manual
Instructions-Parts
333011B
Pro Xp Auto AA Spray Gun
For use in Class I, Div. I Hazardous Locations using Group D spray materials.
Automatic Electrostatic Gun for use in Group II, Zone 1 explosive atmosphere locations
using Group IIA spray materials.
For professional use only.
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Press
100 psi (0.7 MPa, 7 bar) Maximum Working Fluid Pressure
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for Table of Contents and page 3 for
List of Models.
EN
WLD
Table of Contents
Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . 2
List of Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
How the Electrostatic AA Spray Gun Works . . . . 6
Operating the Spray Function . . . . . . . . . . . . . . . 6
Operating the Electrostatics . . . . . . . . . . . . . . . . 6
Gun Features and Options . . . . . . . . . . . . . . . . . 6
Smart Gun Features . . . . . . . . . . . . . . . . . . . . . . 6
System Overview . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical System Installation . . . . . . . . . . . . . . . . . 7
Gun Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Install the System . . . . . . . . . . . . . . . . . . . . . . . . 9
Warning Signs . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ventilate the Spray Booth . . . . . . . . . . . . . . . . . . 9
Install the Air Line Accessories . . . . . . . . . . . . . . 9
Install Fluid Line Accessories . . . . . . . . . . . . . . . 9
Install the Gun . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Install the Pro Xp Auto Control Module . . . . . . . 11
Connect the Air and Fluid Lines . . . . . . . . . . . . 11
Manifold Connections . . . . . . . . . . . . . . . . . . . . 12
Fiber Optic Cable Connection . . . . . . . . . . . . . . 13
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Check Electrical Grounding . . . . . . . . . . . . . . . 14
Check Fluid Resistivity . . . . . . . . . . . . . . . . . . . 15
Check Fluid Viscosity . . . . . . . . . . . . . . . . . . . . 15
Install the Fabric Cover . . . . . . . . . . . . . . . . . . . 15
Flush Before Using Equipment . . . . . . . . . . . . . 15
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Pressure Relief Procedure . . . . . . . . . . . . . . . . 16
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Select a Spray Tip . . . . . . . . . . . . . . . . . . . . . . . 16
Install the Spray Tip . . . . . . . . . . . . . . . . . . . . . 17
Set the Atomization Fluid Pressure . . . . . . . . . . 17
Adjust the Electrostatics . . . . . . . . . . . . . . . . . . 18
Spraying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Triggering the Fluid Alone . . . . . . . . . . . . . . . . . 18
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Daily Care and Cleaning Checklist . . . . . . . . . . 19
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Clean Outside of Gun . . . . . . . . . . . . . . . . . . . . 19
Clean the Spray Gun . . . . . . . . . . . . . . . . . . . . 20
Check for Fluid Leakage . . . . . . . . . . . . . . . . . . 21
Electrical Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Test Gun Resistance . . . . . . . . . . . . . . . . . . . . . 22
Test Power Supply Resistance . . . . . . . . . . . . . 22
Test Barrel Resistance . . . . . . . . . . . . . . . . . . . 23
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Spray Pattern Troubleshooting . . . . . . . . . . . . . 24
Gun Operation Troubleshooting . . . . . . . . . . . . 25
Electrical Troubleshooting . . . . . . . . . . . . . . . . . 27
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Prepare the Gun for Service . . . . . . . . . . . . . . . 28
Remove the Gun from the Manifold . . . . . . . . . . 28
Install the Gun on the Manifold . . . . . . . . . . . . . 29
Air Cap/Tip Guard, Spray Tip, and Fluid Seat
Housing Replacement . . . . . . . . . . . . . . . . . 29
Electrode Replacement . . . . . . . . . . . . . . . . . . . 30
Fluid Tube Replacement . . . . . . . . . . . . . . . . . . 30
Fluid Filter Removal . . . . . . . . . . . . . . . . . . . . . . 31
Fluid Needle Replacement . . . . . . . . . . . . . . . . 31
Piston Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Adjust the Actuator Arm . . . . . . . . . . . . . . . . . . . 32
Barrel Removal . . . . . . . . . . . . . . . . . . . . . . . . . 33
Barrel Installation . . . . . . . . . . . . . . . . . . . . . . . . 33
Power Supply Removal and Replacement . . . . 33
Turbine Removal and Replacement . . . . . . . . . 34
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Standard Pro Xp Auto AA Gun Models . . . . . . . 36
Smart Pro Xp Auto AA Gun Models . . . . . . . . . 38
Air Cap Assembly . . . . . . . . . . . . . . . . . . . . . . . 40
Turbine Assembly . . . . . . . . . . . . . . . . . . . . . . . 41
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Spray Tip Selection Chart . . . . . . . . . . . . . . . . . . . 45
AEM Fine Finish Spray Tips . . . . . . . . . . . . . . . 45
AEF Fine Finish Pre-Orifice Spray Tips . . . . . . . 46
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Graco Pro Xp Warranty . . . . . . . . . . . . . . . . . . . . . 48
2 333011B
List of Models
List of Models
Standard
Part No. kV
HA1M10 85
HA1T10 85
HA2M10 85
HA2T10 85
Model
Approvals
Smart
Model
✔✔
✔✔
✔✔
✔✔
Bottom
Manifold
0.24 mJ
FM14ATEX0081
EN 50050-1
Ta 0°C-50°C
Rear
Manifold
Related Manuals
Manual No. Description
332989 Instructions - Pro Xp Auto Control Module
333011B 3
Warnings
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.
WARNING
WARNINGWARNINGWARNING
FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help
prevent fire and explosion and electric shock:
• Electrostatic equipment must be used only by trained, qualified personnel who understand the
requirements of this manual.
• Ground all equipment, personnel, object being sprayed, and conductive objects in or close to spray
area. Resistance must not exceed 1 megohm. See Grounding instructions.
• Only use grounded Graco conductive air supply hoses.
• Do not use pail liners unless they are conductive and grounded.
• Stop operation immediately if static sparking occurs or you feel a shock. Do not use equipment
until you identify and correct the problem.
• Check gun resistance, hose resistance, and electrical grounding daily.
• Use and clean equipment only in well ventilated area.
• Interlock the gun air supply to prevent operation unless ventilating fans are on.
• Use cleaning solvents with highest possible flash point when flushing or cleaning equipment.
• To clean the exterior of the equipment, cleaning solvents must have a flash point at least 5°C above
ambient temperature.
• Always turn the electrostatics off when flushing, cleaning or servicing equipment.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic
drop cloths (potential static arc).
• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present.
• Keep spray area free of debris, including solvent, rags and gasoline.
• Keep a working fire extinguisher in the work area.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just
a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
4 333011B
Warnings
WARNING
WARNINGWARNINGWARNING
PLASTIC PARTS CLEANING SOLVENT HAZARD
Many solvents can degrade plastic parts and cause them to fail, which could cause serious injury or
property damage.
• Use only compatible water-based solvents to clean plastic structural or pressure-containing parts.
•See Technical Data in this and all other equipment instruction manuals. Read fluid and solvent
manufacturer’s MSDSs and recommendations.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read MSDSs to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. This protective equipment includes but is
not limited to:
• Protective eye wear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and
create safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
333011B 5
Introduction
Introduction
How the Electrostatic AA Spray Gun Works
This is not an air spray gun. To help prevent serious
injury from pressurized fluid, such as skin injection,
and splashing fluid, read and follow the Skin Injection
Hazard Warnings on page 4.
The electrostatic air-assisted spray gun combines airless and air spraying concepts. The spray tip shapes the
fluid into a fan pattern, as does a conventional airless
spray tip. Air from the air cap further atomizes the fluid
and completes the atomization of the fluid tails to produce a uniform pattern.
The high working fluid pressure of this gun provides the
power needed to atomize higher solid materials.
Operating the Spray Function
Applying a minimum of 60 psi (0.42 MPa, 4.2 bar) air
pressure to the gun manifold’s cylinder air fitting (CYL)
will retract the gun piston, which opens the air valves
and a short time later opens the fluid needle. This provides the proper air lead and lag when triggering the
gun. A spring returns the piston when the cylinder air is
shut off.
Gun Features and Options
• The gun's full voltage setting is 85kV.
• The gun is designed for use with a reciprocator, and
can be mounted directly on a 1/2 in. (13 mm) rod.
With additional brackets, the gun can be mounted
for robotic applications.
• The gun’s quick-disconnect design enables its
removal without disconnecting air lines to the gun.
• Gun functions are activated from a separate controller that sends the appropriate signal to the actuating
solenoids.
Smart Gun Features
Smart gun models with the Pro Xp Auto Control Module
have the ability to:
• Display the spraying voltage and current
• Change the gun voltage setting
• Display the gun turbine speed
• Store spray profiles
• Communicate equipment faults to a PLC
• Display and set maintenance totalizers
Operating the Electrostatics
To operate the electrostatics, apply air pressure to the
gun manifold’s turbine air fitting (TA) through a Graco
Grounded Turbine Air Hose. The air enters the manifold
and is directed to the inlet of the power supply turbine.
The air spins the turbine, which then provides electrical
power to the internal high voltage power supply. The
fluid is charged by the spray gun electrode. The charged
fluid is attracted to the nearest grounded object, wrapping around and evenly coating all surfaces.
6 333011B
• Use a PLC to select a spray profile
See the Pro Xp Auto Control Module manual 332989 for
more information.
System Overview
Typical System Installation
F
IGURE
1 shows a typical electrostatic air spray system. It is not an actual system design. For assistance in designing
a system to suit your particular needs, contact your Graco distributor.
Introduction
Non-Hazardous Area
Hazardous Area
*
FIG. 1 Typical System Installation
AGun
B Graco Grounded Turbine Air Hose
C Atomizer, Fan, and Cylinder Air
D Air Supply and controls
E Fluid Supply and controls
* Approved for hazardous locations
333011B 7
Smart System Components
F Programmable Logic Controller (PLC)
G Pro Xp Auto Control Module
H Power Supply (24 Volt)
J Bulkhead (optional)
K F/O Cable
L I/O Cable
Introduction
Gun Overview
K
1
B
F
J
A
C
D
H
G
2
TA
A2
EXH
P
CYL
A1
FIG. 2 Gun Overview
Key
AAir Cap
B Spray Tip
C Retaining Ring
D Shroud
FManifold
G Turbine
H Power Supply
J Electrode
8 333011B
Manifold Fittings and Indicators
A1 Atomization Air Inlet Fitting
A2 Fan Air Inlet Fitting
CYL Cylinder Air Inlet Fitting
1
2
K ES Indicator Light (standard models only)
P Fluid Supply Inlet Fitting
TA Turbine Air Inlet Fitting (to drive turbine)
EXH Exhaust Outlet Fitting
Fiber Optic Fitting Transmit
(Operational on Smart models only)
Fiber Optic Fitting Receive
(Operational on Smart models only)
Installation
Installation
Install the System
Installing and servicing this equipment requires
access to parts which may cause electric shock or
other serious injury if work is not performed properly.
• Do not install or service this equipment unless you
are trained and qualified.
• Be sure your installation complies with local, state,
and national codes for the installation of electrical
apparatus in a Class I, Div. I, hazardous location
or a Group II, Zone I explosive atmosphere
location.
• Comply with all applicable local, state, and
national fire, electrical, and other safety
regulations.
Warning Signs
Mount warning signs in the spray area where they can
easily be seen and read by all operators. An English
Warning Sign is provided with the gun.
Ventilate the Spray Booth
Install the Air Line Accessories
See F
IGURE
3.
1. Install a bleed-type master air valve (L) on the main
air line (W) to shut off all air to the gun.
2. Install an air line filter/water separator on the gun air
line to ensure a dry, clean air supply to the gun. Dirt
and moisture can ruin the appearance of your finished workpiece and can cause the gun to malfunction.
3. Install a bleed-type air pressure regulator (M) on
each of the air supply lines (B, C, D, E) to control air
pressure to the gun.
Trapped air can cause the gun to spray unexpectedly,
which can result in serious injury, including splashing
fluid in the eyes or on the skin. The solenoid valves (K)
must have a quick exhaust port so trapped air will be
relieved between the valve and gun when the
solenoids are shut off.
4. Install a solenoid valve (K) on the cylinder air line
(E) to actuate the gun. The solenoid valve must
have a quick exhaust port.
Provide fresh air ventilation to reduce the risk of fire or
explosion caused by the buildup of flammable or toxic
vapors when spraying, flushing, or cleaning the gun.
Do not operate the gun unless ventilation fans are
operating.
Electrically interlock the gun turbine air supply (B) with
the ventilators to prevent gun operation without ventilating fans operating. Check and follow all local, state, and
national codes regarding air exhaust velocity requirements.
NOTE: High velocity air exhaust will decrease the operating efficiency of the electrostatic system. Air exhaust
velocity of 100 ft/min (31 linear meters/minute) should
be sufficient.
5. Install a solenoid valve (K) to actuate the turbine.
Install Fluid Line Accessories
1. Install a fluid filter and drain valve at the pump outlet. Filtering the fluid will help remove coarse particles and sediment that could clog the spray tip.
NOTE: The gun includes an inline fluid filter for additional filtration.
To reduce the risk of serious injury, including
splashing in the eyes or on the skin, do not operate
equipment without the fluid drain valve installed.
2. Install a fluid regulator on the fluid line to control
fluid pressure to the gun.
3. The fluid drain valve is required in your system to
assist in relieving fluid pressure in the displacement
pump, hose, and gun. Triggering the gun to relieve
pressure may not be sufficient. Install a drain valve
close to the pump's fluid outlet.
333011B 9
Installation
F
IGURE
3 shows a typical electrostatic spray system. It is not an actual system design. For assistance in designing a
system to suit your particular needs, contact your Graco distributor.
NOTE: The grounded turbine air hose (TA) must be electrically
interlocked with the spray booth ventilation fans to prevent the
power supply from operating without ventilating fans on.
See Note above
L
A
L
K
W
K
M
Non-Hazardous Area Hazardous Area
F
IG
. 3 Typical Installation
IGURE
Key to F
3
A Air Hose Ground Wire
B Graco Grounded Turbine Air Hose (TA)
C Atomizing Air Hose, 5/16 in. (8 mm) OD (A1)
D Fan Air Hose, 5/16 in. (8 mm) OD (A2)
E Cylinder Air Hose, 5/32 in. (4 mm) OD (CYL)
High Pressure Fluid Supply Hose to 1/4-18 npsm
G
gun fluid inlet (P)
L
BCD
Manifold Back View
N
E
G
K Solenoid Valve, requires quick exhaust port
L Bleed-Type Master Air Valve
M Air Pressure Regulator
N True Earth Ground
W Main Air Line
10 333011B
Installation
Install the Gun
1. Loosen the manifold’s two set screws (29) and slide
the manifold (20) onto a 1/2 in. (13 mm) mounting
rod.
2. Position the gun and tighten the two set screws.
NOTE: For added positioning reliability, insert a 1/8 in.
(3 mm) locating pin into the slot (NN) in the bracket and
through a hole in the rod. See the detail in F
NN
20
FIG. 4 Mounting Bracket
29
8.00 in.
(203.2 mm)
IGURE
4.
2.88 in.
(73.2 mm)
To nozzle tip
Install the Pro Xp Auto Control Module
Connect the Air and Fluid Lines
F
IGURE
3 shows a schematic of air and fluid line connections, and F
Connect the air and fluid lines as instructed below.
To reduce the risk of electric shock, the turbine air
supply hose must be electrically connected to a true
earth ground. Use only Graco Grounded Turbine
Air Hose.
1. Connect the Graco Grounded Turbine Air Hose (B)
to the gun's turbine air inlet (TA) and connect the
hose ground wire (A) to a true earth ground (N). The
gun turbine air inlet fitting has left-hand threads to
prevent connecting another type of air hose to the
turbine air inlet.
2. Check the electrical grounding of the gun as
instructed on page 14.
3. Before connecting the high pressure fluid hose (P),
blow it out with air and flush it with solvent. Use solvent which is compatible with the fluid to be
sprayed.
IGURE
5 shows the manifold connections.
The Pro Xp Auto Control Module is required for use with
smart models. To install a Pro Xp Auto Control Module,
see the module instruction manual 332989.
333011B 11
Installation
Manifold Connections
1
2
A2
TA
Rear Inlet
P
CYL
A1
A2
A1
EXH
P
CYL
Bottom Inlet
2
1
TA
EXH
FIG. 5 Manifold Connections
Atomization Air Inlet Fitting
A1
Connect a 5/16 in. (8mm) OD tube between this fitting and the air supply.
Fan Air Inlet Fitting
A2
Connect a 5/16 in. (8 mm) OD tube between this fitting and the air supply.
Cylinder Air Inlet Fitting
CYL
Connect a 5/32 in. (4 mm) OD tube between this fitting and the solenoid. For quicker response, use the
shortest hose length possible.
Fiber Optic Fitting Transmit (Operational on Smart models only)
1
Connect the Graco Fiber Optic cable (see page 13).
Fiber Optic Fitting Receive (Operational on Smart models only)
2
Connect the Graco Fiber Optic cable (see page 13).
Fluid Supply Inlet Fitting
P
Connect a 1/4 npsm swivel fitting between this fitting and the fluid supply.
Turbine Air Inlet Fitting
TA
Connect the Graco Grounded Turbine Air Hose between this fitting (left-hand thread) and the solenoid.
Connect the air hose ground wire to a true earth ground.
Exhaust
EXH
Connect an exhaust tube to route the turbine exhaust air. Fitting is for a 5/16 in OD tube.
12 333011B
Fiber Optic Cable Connection
(Operational on Smart models only)
Installation
For a 2 Gun System
NOTE: Only use the supplied fiber optic cable.
The fiber optic cable allows the gun to communicate
with the Pro Xp Auto control module.
For a 1 Gun System
1. Connect Port 1 of the gun 1 manifold to Port 1 of the
Control Module.
2. Connect Port 2 of the gun 1 manifold to Port 2 of the
Control Module.
Non-Hazardous Area
1. Connect Port 1 of the gun 2 manifold to Port 5 of the
Control Module.
2. Connect Port 2 of the gun 2 manifold to Port 6 of the
Control Module.
FIG. 6 . Making Fiber Optic Connections
Hazardous Area
H*
Port 1
R
Key for F
H Pro Xp Auto AA Gun
P 24 Volt Power Supply Connection
Q Remote I/O Connection
R Pro Xp Auto Control Module
U Bulkhead (optional)
V Fiber Optic Cable
IGURE
7
* Approved for hazardous locations.
V
U
Port 2
Port 5
Port 6
1
2
Gun 1
HVH*
P
Q
Gun 2
FIG. 7 . Fiber Optic Schematic
333011B 13
Installation
Grounding
When operating the electrostatic gun, any
ungrounded objects in the spray area (people, containers, tools, etc.) can become electrically charged.
Improper grounding can result in static sparking,
which can cause a fire, explosion, or electric shock.
Ground all equipment, personnel, object being
sprayed, and conductive objects in or close to the
spray area. Resistance must not exceed 1 megohm.
Follow the grounding instructions below.
The following are minimum grounding requirements for
a basic electrostatic system. Your system may include
other equipment or objects which must be grounded.
Check your local electrical code for detailed grounding
instructions. Your system must be connected to a true
earth ground.
•
Pump:
wire and clamp as described in your separate pump
instruction manual.
•
Electrostatic Air Assisted Spray Gun:
gun by connecting the Graco Grounded Turbine Air
Hose to the turbine air inlet and connecting the air
hose ground wire to a true earth ground. See Check
Electrical Grounding, page 14.
•
Air compressors and hydraulic power supplies:
ground the equipment according to the manufacturer's recommendations.
•
All air and fluid lines
•
All electrical cables
All persons entering the spray area:
•
have conductive soles, such as leather, or personal
grounding straps must be worn. Do not wear shoes
with non-conductive soles such as rubber or plastic.
•
Object being sprayed:
ers clean and grounded at all times. Resistance
must not exceed 1 megohm.
•
The floor of the spray area:
conductive and grounded. Do not cover the floor
with cardboard or any non-conductive material
which would interrupt grounding continuity.
•
Flammable liquids in the spray area:
kept in approved, grounded containers. Do not use
plastic containers. Do not store more than the quantity needed for one shift.
ground the pump by connecting a ground
ground the
must be properly grounded.
must be properly grounded.
shoes must
keep the workpiece hang-
must be electrically
must be
All electrically conductive objects or devices in the
•
spray area
cans, must be properly grounded.
•
Fluid and waste containers:
waste containers in the spray area. Do not use pail
liners unless they are conductive and grounded.
When flushing the spray gun, the container used to
catch the excess fluid must be electrically conductive and grounded.
•
All solvent pails:
metal containers, which are conductive. Do not use
plastic containers. Use only non-flammable solvents. Do not store more than the quantity needed
for one shift.
including fluid containers and wash
ground all fluid and
use only approved, grounded
Check Electrical Grounding
Megohmmeter Part No. 241079 (AA-see F
not approved for use in a hazardous area. To reduce
the risk of sparking, do not use the Megohmmeter to
check electrical grounding unless:
The gun has been removed from the hazardous area
Or
All spraying devices in the hazardous area are turned
off, ventilation fans in the hazardous area are
operating, and there are no flammable vapors in the
area (such as open solvent containers or fumes from
spraying).
Failure to follow this warning could cause fire,
explosion, and electric shock and result in serious
injury and property damage.
Graco Part No. 241079 Megohmmeter is available as an
accessory to check that the gun is properly grounded.
1. Have a qualified electrician check the electrical
grounding continuity of the spray gun and turbine air
hose.
2. Make sure the turbine air hose (B) is connected and
the hose ground wire is connected to a true earth
ground (N).
3. Turn off the air and fluid supply to the gun. The fluid
hose must not have any fluid in it.
4. Measure the resistance between the turbine air inlet
fitting (TA) and a true earth ground (N).
a.
If using a black or gray turbine air hose,
Megohmmeter to measure the resistance. Use
IGURE
8) is
use a
14 333011B
Installation
an applied voltage of 500 minimum to 1000
volts maximum. The resistance should not
exceed 1 megohm.
b.
If using a red turbine air hose,
use an ohmmeter
to measure the resistance. The resistance
should not exceed 100 ohms.
5. If the resistance is greater than the maximum reading specified above for your hose, check the tightness of the ground connections and be sure the
turbine air hose ground wire is connected to a true
earth ground. If the resistance is still too high,
replace the turbine air hose.
N
AA
B
TA
FIG. 8 Check Gun Grounding
Check Fluid Resistivity
Check Fluid Viscosity
To check fluid viscosity you will need:
• a viscosity cup
• a stopwatch
1. Completely submerge the viscosity cup in the fluid.
Lift the cup out quickly, starting the stopwatch as
soon as the cup is completely removed.
2. Watch the stream of fluid coming from the bottom of
the cup. As soon as there is a break in the stream,
shut off the stopwatch.
3. Record the fluid type, elapsed time, and size of the
viscosity cup.
4. Compare to the chart supplied by viscosity cup
manufacturer to determine your fluid viscosity.
5. If the viscosity is too high or too low, contact the
material supplier. Adjust as necessary.
Install the Fabric Cover
See F
IGURE
9.
1. Install a fabric cover (XX) over the front of the gun
and slide it back to cover the exposed tubing and
hoses at the back of the manifold.
Check the fluid resistivity in a non-hazardous area
only. Resistance Meter 722886 and Probe 722860
are not approved for use in a hazardous area.
Failure to follow this warning could cause fire,
explosion, and electric shock and result in serious
injury and property damage.
Graco Part No. 722886 Resistance Meter and 722860
Probe are available as accessories to check that the
resistivity of the fluid being sprayed meets the requirements of an electrostatic air spray system.
Follow the instructions included with the meter and
probe. Readings of 25 megohms-cm and above provide
the best electrostatic results.
Megohms-cm
1-5 5-25 25-200 200-2000
Test
electrostatic
performance
Good
electrostatic
results
Best
electrostatic
results
Good
electrostatic
results
2. Route the exhaust tube (YY) outside the cover. This
enables you to monitor the exhaust tube for the
presence of any paint or solvent. See Check for
Fluid Leakage on page 21. Strap down the exhaust
tube to prevent it from moving around.
YY
XX
YY
WLD
FIG. 9 . Fabric Cover
Flush Before Using Equipment
The equipment was tested in fluid at the factory. To
avoid contaminating your fluid, flush the equipment with
a compatible solvent before using the equipment. See
Flushing, page 19.
333011B 15
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