Nordson AN-8 Plus Reference guide

Model AN-8 Plus Manual
Electrostatic Air Spray Gun
Customer Product Manual
Part 107 962H
NORDSON CORPORATION DAMHERST, OHIO DUSA

E1999 Nordson Corporation
All rights reserved
107 962H
Issued 11/99
Manual 21-19
Nordson Corporation welcomes requests for information, comments and inquiries about its products. General
information about Nordson can be found on the Internet using the following address: http://www.nordson.com.
Address all correspondence to:
Nordson Corporation
Attn: Customer Service
555 Jackson Street
Amherst, OH 44001
Notice
This is a Nordson Corporation publication which is protected by copyright. Original copyright date 1991. No part of
this document may be photocopied, reproduced, or translated to another language without the prior written consent
of Nordson Corporation. The information contained in this publication is subject to change without notice.
Trademarks
Blue Box, Can Works, Century, CleanSleeve, CleanSpray, Control Coat, Cross-Cut, Easy Coat, Econo-Coat, Excel
2000, Flow Sentry, FoamMix, Horizon, Hot Shot, Isocoil, Isocore, Iso-Flo, MEG, Nordson, the Nordson logo,
Package of Values, PowderGrid, Pro-Flo, PRX, RBX, Ready Coat, Rhino, SCF, Select Coat, Select Cure, Shur-Lok,
Smart-Coat, System Sentry, Tribomatic, Versa-Coat, Versa-Screen, and Versa-Spray
are registered trademarks of Nordson Corporation.
Accu-Jet, Auto-Flo, CanNeck, Clean Coat, CPX, EasyClean, Ink-Dot, OptiMix, PowderGrid, Pulse-Spray, Sure
Coat, Swirlcoat and Walcom are trademarks of Nordson Corporation.
Parker Lubricant is a registered trademark of Parker Seal.

Table of Contents i
E1999 Nordson Corporation
All rights reserved 107 962H
Issued 11/99
Manual 21-19
Table of Contents
1. Introduction 1-1...............................................
2. Qualified Personnel 1-1.......................................
3. Intended Use 1-1.............................................
4. Regulations and Approvals 1-1.................................
5. Personal Safety 1-2...........................................
High-Pressure Fluids 1-3....................................
6. Fire Safety 1-4...............................................
Halogenated Hydrocarbon Solvent Hazards 1-5................
7. Action in the Event of a Malfunction 1-5..........................
8. Disposal 1-5.................................................
9. Safety Labels 1-7.............................................
1. Introduction 2-1...............................................
2. Options 2-2..................................................
3. Typical Heated Circulating System 2-3..........................
4. Theory of Operation 2-4.......................................
5. Equipment Certification 2-4....................................
1. Introduction 3-1...............................................
2. Installing the Electrostatic Cable 3-1............................
Installing the Cable to the Power Supply 3-1...................
Installing the Cable to the AN-8 Plus Gun 3-2..................
3. Installing the Gun 3-4.........................................
Installing the Tip Resistor, Fluid Tip, and Air Cap 3-4............
Installing the Air Flow Switch, Hoses, and Fittings 3-5...........
4. Securing the Hoses and Gun 3-6...............................
5. Checking the Gun After Installation 3-7..........................
Section 1
Safety
Section 2
Description
Section 3
Installation

Table of Contents
ii
E1999 Nordson Corporation
All rights reserved
107 962H
Issued 11/99
Manual 21-19
6. Converting the Gun for Waterborne Coatings 3-7.................
7. Installing a New Extension Resistor Kit and Cable 3-8............
8. Installing the Optional Miniature Isocoil 3-8.......................
1. Daily 4-1.....................................................
1. Introduction 5-1...............................................
2. Cable and Electrostatic System Maintenance 5-1.................
3. Gun Maintenance 5-2.........................................
1. Introduction 6-1...............................................
2. Mechanical Problems 6-2......................................
3. Electrostatic Problems 6-3.....................................
1. Introduction 7-1...............................................
2. Applying Dielectric Grease 7-1.................................
3. Disassembling the Gun 7-3....................................
Preparation 7-3............................................
External Parts 7-3..........................................
Internal Parts 7-4...........................................
4. Replacing the Extension Resistor Service Kit and Cable 7-7........
5. Replacing the Resistor Only 7-8................................
6. Replacing Parts and Cleaning the Gun 7-9.......................
7. Assembling the Gun 7-10......................................
Internal Parts 7-10..........................................
External Parts 7-11.........................................
Final Assembly and Adjustments 7-12.........................
Section 3
Installation (contd)
Section 4
Operation
Section 5
Maintenance
Section 6
Troubleshooting
Section 7
Repair

Table of Contents iii
E1999 Nordson Corporation
All rights reserved 107 962H
Issued 11/99
Manual 21-19
1. Introduction 8-1...............................................
Using the Illustrated Parts List 8-1............................
2. Gun Assembly 8-2............................................
3. Recommended Spare Parts 8-5................................
4. Service Kits 8-5..............................................
Resistor Service Kit 8-5.....................................
Air Valve Service Kit 8-6.....................................
Trigger Stop Adjustment Service Kit 8-6.......................
Handle Replacement Kit 8-7.................................
Extension Service Kit 8-8....................................
AN-8 Plus Electrostatic Cables 8-8...........................
Cable Cleaning Service Kit 8-8...............................
5. Optional Isocoils 8-9..........................................
AN-8 Plus Miniature Isocoils 8-9..............................
High-Conductivity Isocoil 8-10................................
1. Introduction 9-1...............................................
Dimensions 9-1............................................
Operating Pressures 9-1....................................
Electrical Ratings 9-1.......................................
Air Quality 9-2.............................................
Fittings 9-2................................................
Resistance Values 9-2......................................
Section 8
Parts
Section 9
Specifications

Table of Contents
iv
E1999 Nordson Corporation
All rights reserved
107 962H
Issued 11/99
Manual 21-19

E1998 Nordson Corporation
All rights reserved Issued 10/98
S1EN−03−[SF−LECAP]−7
Section 1
Safety

Safety
1-0
E1998 Nordson Corporation
All rights reserved
Issued 10/98
S1EN−03−[SF−LECAP]−7

Safety 1-1
E1998 Nordson Corporation
All rights reserved Issued 10/98
S1EN−03−[SF−LECAP]−7
Section 1
Safety
Read and follow these safety instructions. Task- and equipment-specific
warnings, cautions, and instructions are included in equipment
documentation where appropriate.
Make sure all equipment documentation, including these instructions, is
accessible to persons operating or servicing equipment.
Equipment owners are responsible for making sure that Nordson
equipment is installed, operated, and serviced by qualified personnel.
Qualified personnel are those employees or contractors who are trained
to safely perform their assigned tasks. They are familiar with all relevant
safety rules and regulations and are physically capable of performing
their assigned tasks.
Use of Nordson equipment in ways other than those described in the
documentation supplied with the equipment may result in injury to
persons or damage to property.
Some examples of unintended use of equipment include
Susing incompatible materials
Smaking unauthorized modifications
Sremoving or bypassing safety guards or interlocks
Susing incompatible or damaged parts
Susing unapproved auxiliary equipment
Soperating equipment in excess of maximum ratings
Make sure all equipment is rated and approved for the environment in
which it is used. Any approvals obtained for Nordson equipment will be
voided if instructions for installation, operation, and service are not
followed.
1. Introduction
2. Qualified Personnel
3. Intended Use
4. Regulations and
Approvals

Safety
1-2
E1998 Nordson Corporation
All rights reserved
Issued 10/98
S1EN−03−[SF−LECAP]−7
To prevent injury follow these instructions.
SDo not operate or service equipment unless you are qualified.
SDo not operate equipment unless safety guards, doors, or covers are
intact and automatic interlocks are operating properly. Do not bypass
or disarm any safety devices.
SKeep clear of moving equipment. Before adjusting or servicing
moving equipment, shut off the power supply and wait until the
equipment comes to a complete stop. Lock out power and secure the
equipment to prevent unexpected movement.
SRelieve (bleed off) hydraulic and pneumatic pressure before adjusting
or servicing pressurized systems or components. Disconnect, lock
out, and tag switches before servicing electrical equipment.
SWhile operating manual spray guns, make sure you are grounded.
Wear electrically conductive gloves or a grounding strap connected to
the gun handle or other true earth ground. Do not wear or carry
metallic objects such as jewelry or tools.
SIf you receive even a slight electrical shock, shut down all electrical or
electrostatic equipment immediately. Do not restart the equipment
until the problem has been identified and corrected.
SObtain and read Material Safety Data Sheets (MSDS) for all materials
used. Follow the manufacturer’s instructions for safe handling and
use of materials, and use recommended personal protection devices.
SMake sure the spray area is adequately ventilated.
STo prevent injury, be aware of less-obvious dangers in the workplace
that often cannot be completely eliminated, such as hot surfaces,
sharp edges, energized electrical circuits, and moving parts that
cannot be enclosed or otherwise guarded for practical reasons.
5. Personal Safety

Safety 1-3
E1998 Nordson Corporation
All rights reserved Issued 10/98
S1EN−03−[SF−LECAP]−7
High-pressure fluids, unless they are safely contained, are extremely
hazardous. Always relieve fluid pressure before adjusting or servicing
high pressure equipment. A jet of high-pressure fluid can cut like a knife
and cause serious bodily injury, amputation, or death. Fluids penetrating
the skin can also cause toxic poisoning.
If you suffer a fluid injection injury, seek medical care immediately. If
possible, provide a copy of the MSDS for the injected fluid to the health
care provider.
The National Spray Equipment Manufacturers Association has created a
wallet card that you should carry when you are operating high-pressure
spray equipment. These cards are supplied with your equipment. The
following is the text of this card:
WARNING: Any injury caused by high pressure liquid can be
serious. If you are injured or even suspect an injury:
SGo to an emergency room immediately.
STell the doctor that you suspect an injection injury.
SShow him this card.
STell him what kind of material you were spraying.
MEDICAL ALERT−AIRLESS SPRAY WOUNDS: NOTE TO PHYSICIAN
Injection in the skin is a serious traumatic injury. It is important to treat
the injury surgically as soon as possible. Do not delay treatment to
research toxicity. Toxicity is a concern with some exotic coatings injected
directly into the bloodstream.
Consultation with a plastic surgeon or a reconstructive hand surgeon may
be advisable.
The seriousness of the wound depends on where the injury is on the
body, whether the substance hit something on its way in and deflected
causing more damage, and many other variables including skin
microflora residing in the paint or gun which are blasted into the wound.
If the injected paint contains acrylic latex and titanium dioxide that
damage the tissue’s resistance to infection, bacterial growth will flourish.
The treatment that doctors recommend for an injection injury to the hand
includes immediate decompression of the closed vascular compartments
of the hand to release the underlying tissue distended by the injected
paint, judicious wound depravement, and immediate antibiotic treatment.
High-Pressure Fluids

Safety
1-4
E1998 Nordson Corporation
All rights reserved
Issued 10/98
S1EN−03−[SF−LECAP]−7
To avoid a fire or explosion, follow these instructions.
SGround all conductive equipment in the spray area. Use only
grounded air and fluid hoses. Check equipment and workpiece
grounding devices regularly. Resistance to ground must not exceed
one megohm.
SShut down all equipment immediately if you notice static sparking or
arcing. Do not restart the equipment until the cause has been
identified and corrected.
SDo not smoke, weld, grind, or use open flames where flammable
materials are being used or stored.
SDo not heat materials to temperatures above those recommended by
the manufacturer. Make sure heat monitoring and limiting devices are
working properly.
SProvide adequate ventilation to prevent dangerous concentrations of
volatile particles or vapors. Refer to local codes or your material
MSDS for guidance.
SDo not disconnect live electrical circuits while working with flammable
materials. Shut off power at a disconnect switch first to prevent
sparking.
SKnow where emergency stop buttons, shutoff valves, and fire
extinguishers are located. If a fire starts in a spray booth,
immediately shut off the spray system and exhaust fans.
SShut off electrostatic power and ground the charging system before
adjusting, cleaning, or repairing electrostatic equipment.
SClean, maintain, test, and repair equipment according to the
instructions in your equipment documentation.
SUse only replacement parts that are designed for use with original
equipment. Contact your Nordson representative for parts
information and advice.
6. Fire Safety

Safety 1-5
E1998 Nordson Corporation
All rights reserved Issued 10/98
S1EN−03−[SF−LECAP]−7
Do not use halogenated hydrocarbon solvents in a pressurized system
that contains aluminum components. Under pressure, these solvents
can react with aluminum and explode, causing injury, death, or property
damage. Halogenated hydrocarbon solvents contain one or more of the
following elements:
Element Symbol Prefix
Fluorine F “Fluoro-”
Chlorine Cl “Chloro-”
Bromine Br “Bromo-”
Iodine I “Iodo-”
Check your material MSDS or contact your material supplier for more
information. If you must use halogenated hydrocarbon solvents, contact
your Nordson representative for information about compatible Nordson
components.
If a system or any equipment in a system malfunctions, shut off the
system immediately and perform the following steps:
SDisconnect and lock out system electrical power. Close hydraulic and
pneumatic shutoff valves and relieve pressures.
SIdentify the reason for the malfunction and correct it before restarting
the system.
Dispose of equipment and materials used in operation and servicing
according to local codes.
Halogenated Hydrocarbon
Solvent Hazards
7. Action in the Event of a
Malfunction
8. Disposal

Safety
1-6
E1998 Nordson Corporation
All rights reserved
Issued 10/98
S1EN−03−[SF−LECAP]−7

Safety 1-7
E1999 Nordson Corporation
All rights reserved 107 962H
Issued 11/99
Manual 21-19
Table 1-1 contains the text of the safety label on this equipment. The
safety label is provided to help you operate and maintain your equipment
safely. See Figure 1-1 for the location of the safety label.
Table 1-1 Safety Labels
Item Part Description
1. 241 162 WARNING: High voltage. Read manual before using. All conductive objects in area must be
grounded.
—600 001 WARNING: The following procedures MUST be followed when working with this electrostatic
spray equipment. Failure to follow these instructions may result in a fire and/or
serious personal injury. Display this warning on the spray booth.
1. NO SMOKING. Keep open flames, hot surfaces, and sparks
from torches or grinding away from booth.
2. Turn the electrostatic power unit OFF when the spray gun is
not in use.
3. Appropriate control interlocks and fire suppression apparatus
must be installed and operative.
4. Ground the power unit, the spray booth, work hangers,
conveyor rollers, channels, and all other conductive objects
within approximately 3 m (10 ft) of the electrostatic spay gun.
THE FLOOR MUST BE CONDUCTIVE AND GROUNDED.
5. Examine all equipment at the beginning of each work period
and repair or replace any damaged, loose, or missing parts.
6. Maintain grounding of all work pieces. Work hangers,
conveyor rollers, channels, etc. MUST BE CLEAN. Electrical
sparks from discharge of static accumulation are capable of
igniting fires. If any sparking is seen around the workpiece,
conveyors, or other metal objects in the area, immediately
shut down the process and correct grounding before
continuing process.
7. Operator must be grounded to prevent shocks from static
electricity. Floor surface must be conductive. Footwear and
gloves must be static dissipative in accordance with ANSI
Z41-1991.
8. Before cleaning the nozzle or performing any work on the
electrostatic spray gun, turn off the power unit and ground the
nozzle. The nozzle MUST BE REMOVED for cleaning. Use
a non-flammable solvent in a non-conductive container, i.e.
glass container.
Continued on next page
9. Safety Labels

Safety
1-8
E1999 Nordson Corporation
All rights reserved
107 962H
Issued 11/99
Manual 21-19
Item Part Description
9. NEVER use or store flammable solvents in the spray area.
10. Make no modification to this electrostatic equipment or its
fluid feed system without written permission from Nordson
Corporation, 555 Jackson Street, Amherst, OH, 44001,
U.S.A.
11. When providing an air supply to an electrostatic waterborne
hand spray gun, the air hose must be electrically conductive
in nature. Continuity between end fittings must be 1 megohm
or less.
12. Refer to: Instruction manuals; appropriate federal, state, and
local regulations; and to ANSI/NFPA 33 for further guidance
and requirements for safe operations.
If you have questions concerning this electrostatic spray equipment, call [phone], and
ask to speak with the Liquid Systems Group Technical Service Department.
Nordson Corporation, Amherst, OH, 44001, U.S.A.
2119001A
1
Fig. 1-1 AN-8 Plus Gun Safety Label Location
1. Safety Label
9. Safety Labels (contd)

E1999 Nordson Corporation
All rights reserved 107 962H
Issued 11/99
Manual 21-19
Section 2
Description

Description
2-0
E1999 Nordson Corporation
All rights reserved
107 962H
Issued 11/99
Manual 21-19

Description 2-1
E1999 Nordson Corporation
All rights reserved 107 962H
Issued 11/99
Manual 21-19
Section 2
Description
See Figure 2-1. The Model AN-8 Plus is an air-atomizing, electrostatic,
manual spray gun. This light-weight gun can spray a wide range of
solvent-based coating materials. The AN-8 Plus gun is designed for use
with a Nordson model EPS8 electrostatic power supply, which is
equipped with an electro-pneumatic flow switch.
The AN-8 Plus gun is light weight and well balanced. You can adjust the
horn air pressure and fluid flow rate of the AN-8 Plus gun, and easily
disassemble the gun for cleaning and repair.
Optional equipment for the AN-8 Plus gun includes 8-, 12-, and 16-meter
(25-, 37-, and 52-feet, respectively) electrostatic cables, a miniature
Isocoil for highly conductive coating materials, a variety of fluid tips and
air caps, an electro-pneumatic air flow switch for the EPS8 electrostatic
power supply, and air and fluid hoses and fittings.
2119002A
Fig. 2-1 AN-8 Plus Manual Electrostatic Air Spray Gun
1. Introduction

Description
2-2
E1999 Nordson Corporation
All rights reserved
107 962H
Issued 11/99
Manual 21-19
NOTE: Refer to the following documents for more information about
AN-8 Plus gun parts:
SStandard and Conical Air Spray Nozzles and Air Flow Switch
instruction sheets
SLow Pressure Fluid Hose, Air Hose, High Dielectric Strength Fluid
Connectors instruction sheet
SAN-8 Plus Air Spray Gun Solvent-Based to Waterborne Conversion
Kit instruction sheet
SAN-8 Fluid Tubes and Isocoils instruction sheet
SIsocore Hose Connector Kit instruction sheet
SElectrostatic System Checks instruction sheet
Refer to the Parts section of this manual for more information on the
electrostatic cables and the Isocoil.
WARNING: To prevent hazards that can cause personal injury
or death, do not use unauthorized parts or modify any
component of the gun, including parts of the fluid-feed system
between the gun and the earth ground connection of the gun.
When you use highly conductive coating materials, you might need to
install the optional Isocoil in place of the standard fluid tube. The Isocoil
increases the length of the fluid tube and provides a greater resistance to
the electrostatic charge, which prevents it from traveling back to the gun
handle. Refer to the Parts section for ordering information for the Isocoil.
You can also convert the AN-8 Plus gun for use with waterborne
materials. Refer to AN-8 Plus Waterborne Conversion Kit instructions for
conversion data.
WARNING: To prevent a fire hazard, make sure that you
effectively connect all electrically conductive objects near the
spray operation to a true earth ground. Ungrounded conductive
objects can accumulate an electrical charge great enough to
cause a fire when they discharge.
When correctly installed and maintained, an AN-8 Plus gun will not
discharge sparks capable of igniting any common solvent-based coating
materials, and can be used at any distance from the workpiece.
1. Introduction (contd)
2. Options