LA 820 / LA 820 RC Liquid Adhesive Gunemanuals.nordson.com/adhesives/English_Manuals/7105681.pdf ·...

LA 820 / LA 820 RCLiquid Adhesive Gun

Manual P/N 7105681B English

Issued 04/07

NORDSON BENELUX � MAASTRICHT � THE NETHERLANDS

P/N 7105681B � 2007 Nordson CorporationLA 820 / LA 820 RCIssued 04/07

Order numberP/N = Order number for Nordson products

NoticeThis is a Nordson Corporation publication which is protected by copyright. Original copyright date 2005.No part of this document may be photocopied, reproduced, or translated to another language without theprior written consent of Nordson Corporation. The information contained in this publication is subject to

change without notice.

© 2007 All rights reserved.

TrademarksAccuJet, AeroCharge, AquaGuard, Asymtek, Automove, Autotech, Baitgun, Blue Box, CanWorks, Century, CF, Clean Coat, CleanSleeve, CleanSpray,Control Coat, Coolwave, Cross-Cut, Cyclo-Kinetic, Dispensejet, DispenseMate, DuraBlue, Durafiber, Durasystem, Easy Coat, Easymove Plus,Econo-Coat, EFD, ETI, Excel 2000, FlexiCoat, Flexi-Spray, Flex-O-Coat, Flow Sentry, Fluidmove, FoamMelt, FoamMix, Heli-flow, Helix, Horizon, Hot Shot,iControl, Isocoil, Isocore, Iso-Flo, JR, KB30, Kinetix, Little Squirt, Magnastatic, March, MEG, Meltex, Microcoat, Micromark, MicroSet, Millenium, Mini Squirt,Moist-Cure, Mountaingate, MultiScan, Nordson, OmniScan, OptiMix, Package of Values, PatternView, PermaFlo, Plasmod, PluraFoam, Porous Coat,PowderGrid, Powderware, Prism, ProBlue, Pro-Flo, ProLink, Pro-Meter, Pro-Stream, RBX, Rhino, Saturn, SC5, S. design stylized, Seal Sentry, Select Charge,Select Coat, Select Cure, Slautterback, Smart-Coat, Solder Plus, Spectrum, Speed-Coat, Spraymelt, Spray Squirt, Super Squirt, Sure Coat, Tela-Therm,Tracking Plus, Trends, Tribomatic, Ultrasaver, UniScan, UpTime, Veritec, VersaBlue, Versa-Coat, Versa-Screen, Versa-Spray, Walcom, Watermark,When you expect more. are registered trademarks ® of Nordson Corporation.

Advanced Plasma Systems, AeroDeck, AeroWash, Apogee, ATS, Auto-Flo, AutoScan, BetterBook, CanNeck, Celero, Chameleon, Check Mate,ColorMax, Controlled Fiberization, Control Weave, CPX, DispensLink, Dry Cure, Dura-Coat, DuraPail, Dura-Screen, Easy Clean, Eclipse, EcoDry, e.DOT,E-Nordson, Equi=Bead, ESP, e Stylized, Fillmaster, Fill Sentry, Gluie, HDLV, iFlow, Ink-Dot, iON, Iso-Flex, iTRAX, iTrend, KVLP, Lacquer Cure, Lean Cell,Maxima, MicroFin, MicroMax, Minimeter, Multifil, OptiStroke, Origin, PatternPro, PluraMix, Powder Pilot, Powercure, Primarc, Printplus, Process Sentry,Pulse Spray, PurTech, Ready Coat, Royal Blue, Scoreguard, Select Series, Sensomatic, Shaftshield, SheetAire, Spectral, Spectronic, Speedking, Spray Works,Summit, SureBead, Sure Brand, Sure Clean, Sure-Max, Swirl Coat, Tempus, ThruWave, Trade Plus, Trak, True Blue, Ultra, Ultrasmart, Universal,Vantage, Viper, Vista, Web Cure, 2 Rings (Design) are trademarks � of Nordson Corporation.

Designations and trademarks stated in this document may be brands that, when used by third parties for their own purposes, could lead to violation of the owners’ rights.

Table of Contents I

P/N 7105681B� 2007 Nordson Corporation LA 820 / LA 820 RCIssued 04/07

Table of Contents

Nordson International O-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Europe O-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Distributors in Eastern & Southern Europe O-1. . . . . . . . . . . . . . . . Outside Europe / Hors d’Europe / Fuera de Europa O-2. . . . . . . . . . .

Africa / Middle East O-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Asia / Australia / Latin America O-2. . . . . . . . . . . . . . . . . . . . . . . . . . Japan O-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . North America O-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Hot Melt Material Processing Instructions 0-3. . . . . . . . Storage 0-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preparations for Material Application/Coating 0-3. . . . . . . . . . . . . . . . Processing Temperature 0-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Danger of Burns 0-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mixing Hot Melt Materials 0-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disposal of Hot Melt Material 0-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Additional Note for Polyurethane (PUR) 0-4. . . . . . . . . . . . . . . . . . . . .

Safety 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Alert Symbols 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Responsibilities of the Equipment Owner 1-2. . . . . . . . . . . . . . . . . . . .

Safety Information 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instructions, Requirements, and Standards 1-2. . . . . . . . . . . . . . . User Qualifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Applicable Industry Safety Practices 1-4. . . . . . . . . . . . . . . . . . . . . . . . Intended Use of the Equipment 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . Instructions and Safety Messages 1-4. . . . . . . . . . . . . . . . . . . . . . . Installation Practices 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Practices 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance and Repair Practices 1-6. . . . . . . . . . . . . . . . . . . . . . .

Equipment Safety Information 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Equipment Shutdown 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Relieving System Hydraulic Pressure 1-7. . . . . . . . . . . . . . . . . . De-energizing the System 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabling the Guns 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Safety Warnings and Cautions 1-9. . . . . . . . . . . . . . . . . . . Other Safety Precautions 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . First Aid 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Special Safety Instructions 1-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Labels on the Gun 1-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Instructions in the Manual 1-13. . . . . . . . . . . . . . . . . . . . . . . .

Table of ContentsII


Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intended Use 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unintended Use Examples 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . Safety Instructions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Residual Risks 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Information 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Updated Bill of Material 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functioning 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Method of Operation 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Components 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LA 820 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LA 820 RC LogiComm 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LA 820 RC LA4xx 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unpacking 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transport 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disposal 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connecting 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Material Lines 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Lines 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting the Adhesive Quantity, LA 820 3-4. . . . . . . . . . . . . . . . . . . . . . Setting the Adhesive Quantity, LA 820 RC 3-4. . . . . . . . . . . . . . . . . . . Mounting Brackets 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Adhesive Processing Instructions 4-1. . . . . . . . . . . . . . . . . . . Compatibility of Different Types of Adhesives 4-1. . . . . . . . . . . . . . . . Switching Off in an Emergency 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . Initial Startup 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Daily Startup 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Daily Shutdown 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preventive Maintenance 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning the Liquid Adhesive Gun 5-2. . . . . . . . . . . . . . . . . . . . . . . Regular Maintenance 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disassembling the LA 820 Liquid Adhesive Gun 5-3. . . . . . . . . . . . . . Disassembling the LA 820 RC Liquid Adhesive Gun 5-5. . . . . . . . . . Assembling the LA 820 Liquid Adhesive Gun 5-7. . . . . . . . . . . . . . . . Assembling the LA 820 RC Liquid Adhesive Gun 5-7. . . . . . . . . . . . .

Table of Contents III


Troubleshooting 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Updated Bill of Material 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Liquid Adhesive Gun, LA 820 - 7/16-20 UNF 7-2. . . . . . . . . . . . . . Liquid Adhesive Gun, LA 820 - 1/2-20 UNF 7-4. . . . . . . . . . . . . . . Liquid Adhesive Gun, LA 820 RC LogiComm 7-6. . . . . . . . . . . . . . Liquid Adhesive Gun, LA 820 RC LA4xx 7-8. . . . . . . . . . . . . . . . . . Module, Liquid Adhesive Gun, LA 820 for LA 4xx 7-10. . . . . . . . . . Module, Liquid Adhesive Gun, LA 820 RC LogiComm 7-12. . . . . . Module, Liquid Adhesive Gun, LA 820 RC LA4xx 7-14. . . . . . . . . . Filter Ass’y, Liquid Adhesive Gun, LA 820 RC 7-16. . . . . . . . . . . . . Nozzles, Liquid Adhesive Gun, LA 820 7-17. . . . . . . . . . . . . . . . . . . Nozzles, Liquid Adhesive Gun, LA 820 RC 7-17. . . . . . . . . . . . . . . . Manifold for 2 Liquid Adhesive Guns, LA 820 - 7/16-20 UNF, Stackable 7-18. . . . . . . . . . . . . . . . . . . . . . . . Manifold for 2 Liquid Adhesive Guns, LA 820 - 1/2-20 UNF, Stackable 7-20. . . . . . . . . . . . . . . . . . . . . . . . . Manifold for Additional Liquid Adhesive Gun LA 820, Stackable 7-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Kits 7-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nozzle Kit, Liquid Adhesive Gun, LA 820 7-24. . . . . . . . . . . . . . . . . Upgrade Kit from Liquid Adhesive Guns LA 820 to LA 820 RC 7-25Needle and Nozzle Kit, Liquid Adhesive Gun, LA 820 7-26. . . . . . . Needle and Nozzle Kit, Liquid Adhesive Gun, LA 820 RC 7-27. . . Seal Kit, Liquid Adhesive Gun, LA 820 7-28. . . . . . . . . . . . . . . . . . .

Accessories 7-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Cables 7-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adhesive Connection Adapter 7-29. . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Data 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Data 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dimensions 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Liquid Adhesive Gun, LA 820 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . Liquid Adhesive Gun, LA 820 RC 8-3. . . . . . . . . . . . . . . . . . . . . . . . Mounting Bracket, Liquid Adhesive Gun, LA 820 RC 8-4. . . . . . .

Table of ContentsIV


O-1Introduction

� 2007 Nordson CorporationAll rights reserved

NI_EN_M-0307

Nordson International

http://www.nordson.com/Directory

Country Phone Fax

EuropeAustria 43-1-707 5521 43-1-707 5517

Belgium 31-13-511 8700 31-13-511 3995

Czech Republic 4205-4159 2411 4205-4124 4971

Denmark Hot Melt 45-43-66 0123 45-43-64 1101

Finishing 45-43-200 300 45-43-430 359

Finland 358-9-530 8080 358-9-530 80850

France 33-1-6412 1400 33-1-6412 1401

Germany Erkrath 49-211-92050 49-211-254 658

Lüneburg 49-4131-8940 49-4131-894 149

Nordson UV 49-211-9205528 49-211-9252148

EFD 49-6238 920972 49-6238 920973

Italy 39-02-904 691 39-02-9078 2485

Netherlands 31-13-511 8700 31-13-511 3995

Norway Hot Melt 47-23 03 6160 47-23 68 3636

Poland 48-22-836 4495 48-22-836 7042

Portugal 351-22-961 9400 351-22-961 9409

Russia 7-812-718 62 63 7-812-718 62 63

Slovak Republic 4205-4159 2411 4205-4124 4971

Spain 34-96-313 2090 34-96-313 2244

Sweden 46-40 680 1700 46-40-932 882

Switzerland 41-61-411 3838 41-61-411 3818

UnitedKingdom

Hot Melt 44-1844-26 4500 44-1844-21 5358

Finishing 44-161-495 4200 44-161-428 6716

Nordson UV 44-1753-558 000 44-1753-558 100

Distributors in Eastern & Southern Europe

DED, Germany 49-211-92050 49-211-254 658

O-2 Introduction

� 2007 Nordson CorporationAll rights reserved

NI_EN_M 0307

Outside Europe / Hors d’Europe / Fuera de Europa

� For your nearest Nordson office outside Europe, contact the Nordsonoffices below for detailed information.

� Pour toutes informations sur représentations de Nordson dans votrepays, veuillez contacter l’un de bureaux ci-dessous.

� Para obtener la dirección de la oficina correspondiente, por favordiríjase a unas de las oficinas principales que siguen abajo.

Contact Nordson Phone Fax

Africa / Middle EastDED, Germany 49-211-92050 49-211-254 658

Asia / Australia / Latin America

Pacific South Division,USA

1-440-685-4797

JapanJapan 81-3-5762 2700 81-3-5762 2701

North AmericaCanada 1-905-475 6730 1-905-475 8821

USA Hot Melt 1-770-497 3400 1-770-497 3500

Finishing 1-880-433 9319 1-888-229 4580

Nordson UV 1-440-985 4592 1-440-985 4593

Introduction 0-3

HMIPUR01_EN_B 1294� 1994 Nordson Corporation

General Hot Melt Material ProcessingInstructions

NOTE: Before processing hot melt material, carefully read the materialmanufacturer’s Material Safety Data Sheet (MSDS) or material informationsheet. Nordson supplies only general processing instructions and is notliable for hazards associated with or damage caused by the use of hot meltmaterial.

StorageStore the material in dry areas at room temperature. Keep it in covered,dust-protected containers.

Preparations for Material Application/CoatingKeep the substrate at room temperature, dry, and free of dust and grease.Perform tests to determine the suitable hot melt material, optimum operatingconditions, and preliminary treatment of the substrate for the application.

Some substrates contain plasticizers and other ingredients which dissipateover time. In some cases, surfaces are treated with waxes, anti-stick oils,etc. Without adequate pretreatment, the hot melt bond in these applicationsmay be defective at the time of dispensing.

Processing TemperatureThe application temperature of the hot melt material at the nozzle is crucialfor effective bonds.

Refer to the material manufacturer’s MSDS or material information sheet.

Avoid unnecessary thermal stress. If the work is interrupted, reduce themelting temperature.

Avoid heating the hot melt material above the prescribed processing tem-perature. Higher temperatures may cause charring of the hot melt material.This results in downtime. In addition, material may generate dangerous va-pors at excessively high temperatures. Remove these vapors by using ap-propriate exhaust systems.

Introduction0-4

HMIPUR01_EN_B 1294 � 1994 Nordson Corporation

Danger of BurnsBe careful when using hot melt materials. These materials are solid at roomtemperature. For proper application, they may be heated to temperatures ofup to 230 �C (450 �F). Refer to the safety instructions in the Safety section.

Mixing Hot Melt MaterialsAvoid mixing different hot melt materials. Refer to Changing the Hot MeltMaterial in the Maintenance section.

Disposal of Hot Melt MaterialRefer to the supplier’s MSDS or material information sheet.

Additional Note for Polyurethane (PUR)When processing Polyurethane-type hot melt materials (PUR), you mustfollow these additional instructions carefully:

� Use appropriate respiratory equipment when material vapors exceedpermissible limit values.

� If prescribed by the material manufacturer, pressurize the applicator’stank with an inert gas blanket.

� During production breaks, set the temperature back and close the gunnozzles temporarily with vaseline or dip them into another suitable oil.

� Do not empty the tank completely. PUR material residues in bores maycure.

� Before longer standstill periods, purge the system with a fluid recom-mended by the material manufacturer.

Safety 1-1

� 2004 Nordson CorporationA1EN 01 [XX SAFE] 10

Section 1Safety

Read this section before using the equipment. This section containsrecommendations and practices applicable to the safe installation,operation, and maintenance (hereafter referred to as “use”) of the productdescribed in this document (hereafter referred to as “equipment”).Additional safety information, in the form of task-specific safety alertmessages, appears as appropriate throughout this document.

WARNING: Failure to follow the safety messages, recommendations, andhazard avoidance procedures provided in this document can result inpersonal injury, including death, or damage to equipment or property.

Safety Alert Symbols

The following safety alert symbol and signal words are used throughout thisdocument to alert the reader to personal safety hazards or to identifyconditions that may result in damage to equipment or property. Comply withall safety information that follows the signal word.

WARNING: Indicates a potentially hazardous situation that, if not avoided,can result in serious personal injury, including death.

CAUTION: Indicates a potentially hazardous situation that, if not avoided,can result in minor or moderate personal injury.

CAUTION: (Used without the safety alert symbol) Indicates a potentiallyhazardous situation that, if not avoided, can result in damage to equipmentor property.

Safety1-2


Responsibilities of the Equipment Owner

Equipment owners are responsible for managing safety information,ensuring that all instructions and regulatory requirements for use of theequipment are met, and for qualifying all potential users.

Safety Information� Research and evaluate safety information from all applicable sources,

including the owner-specific safety policy, best industry practices,governing regulations, material manufacturer’s product information, andthis document.

� Make safety information available to equipment users in accordancewith governing regulations. Contact the authority having jurisdiction forinformation.

� Maintain safety information, including the safety labels affixed to theequipment, in readable condition.

Instructions, Requirements, and Standards� Ensure that the equipment is used in accordance with the information

provided in this document, governing codes and regulations, and bestindustry practices.

� If applicable, receive approval from your facility’s engineering or safetydepartment, or other similar function within your organization, beforeinstalling or operating the equipment for the first time.

� Provide appropriate emergency and first aid equipment.

� Conduct safety inspections to ensure required practices are beingfollowed.

� Re-evaluate safety practices and procedures whenever changes aremade to the process or equipment.

Safety 1-3


User QualificationsEquipment owners are responsible for ensuring that users:

� Receive safety training appropriate to their job function as directedby governing regulations and best industry practices

� Are familiar with the equipment owner’s safety and accidentprevention policies and procedures

� Receive, equipment- and task-specific training from another qualifiedindividual

NOTE: Nordson can provide equipment-specific installation,operation, and maintenance training. Contact your Nordsonrepresentative for information

� Possess industry- and trade-specific skills and a level of experienceappropriate to their job function

� Are physically capable of performing their job function and are notunder the influence of any substance that degrades their mentalcapacity or physical capabilities

Safety1-4


Applicable Industry Safety Practices

The following safety practices apply to the use of the equipment in themanner described in this document. The information provided here is notmeant to include all possible safety practices, but represents the best safetypractices for equipment of similar hazard potential used in similar industries.

Intended Use of the Equipment� Use the equipment only for the purposes described and within the limits

specified in this document.

� Do not modify the equipment.

� Do not use incompatible materials or unapproved auxiliary devices.Contact your Nordson representative if you have any questions onmaterial compatibility or the use of non-standard auxiliary devices.

Instructions and Safety Messages� Read and follow the instructions provided in this document and other

referenced documents.

� Familiarize yourself with the location and meaning of the safety warninglabels and tags affixed to the equipment. Refer to Safety Labels andTags (if available) at the end of this section.

� If you are unsure of how to use the equipment, contact your Nordsonrepresentative for assistance.

Safety 1-5


Installation Practices� Install the equipment in accordance with the instructions provided in this

document and in the documentation provided with auxiliary devices.

� Ensure that the equipment is rated for the environment in which it will beused and that the processing characteristics of the material will notcreate a hazardous environment. Refer to the Material Safety DataSheet (MSDS) for the material.

� If the required installation configuration does not match the installationinstructions, contact your Nordson representative for assistance.

� Position the equipment for safe operation. Observe the requirements forclearance between the equipment and other objects.

� Install lockable power disconnects to isolate the equipment and allindependently powered auxiliary devices from their power sources.

� Properly ground all equipment. Contact your local building codeenforcement agency for specific requirements.

� Ensure that fuses of the correct type and rating are installed in fusedequipment.

� Contact the authority having jurisdiction to determine the requirement forinstallation permits or inspections.

Operating Practices� Familiarize yourself with the location and operation of all safety devices

and indicators.

� Confirm that the equipment, including all safety devices (guards,interlocks, etc.), is in good working order and that the requiredenvironmental conditions exist.

� Use the personal protective equipment (PPE) specified for each task.Refer to Equipment Safety Information or the material manufacturer’sinstructions and MSDS for PPE requirements.

� Do not use equipment that is malfunctioning or shows signs of apotential malfunction.

Safety1-6


Maintenance and Repair Practices� Perform scheduled maintenance activities at the intervals described in

this document.

� Relieve system hydraulic and pneumatic pressure before servicing theequipment.

� De-energize the equipment and all auxiliary devices before servicing theequipment.

� Use only new or factory-authorized refurbished replacement parts.

� Read and comply with the manufacturer’s instructions and the MSDSsupplied with equipment cleaning compounds.

NOTE: MSDSs for cleaning compounds that are sold by Nordson areavailable at www.nordson.com or by calling your Nordsonrepresentative.

� Confirm the correct operation of all safety devices before placing theequipment back into operation.

� Dispose of waste cleaning compounds and residual process materialsaccording to governing regulations. Refer to the applicable MSDS orcontact the authority having jurisdiction for information.

� Keep equipment safety warning labels clean. Replace worn ordamaged labels.

Safety 1-7


Equipment Safety Information

This equipment safety information is applicable to the following types ofNordson equipment:

� hot melt and cold adhesive application equipment and all relatedaccessories

� pattern controllers, timers, detection and verification systems, and allother optional process control devices

Equipment ShutdownTo safely complete many of the procedures described in this document, theequipment must first be shut down. The level of shut down required variesby the type of equipment in use and the procedure being completed. Ifrequired, shut down instructions are specified at the start of the procedure.The levels of shut down are:

Relieving System Hydraulic PressureCompletely relieve system hydraulic pressure before breaking any hydraulicconnection or seal. Refer to the melter-specific product manual forinstructions on relieving system hydraulic pressure.

De-energizing the SystemIsolate the system (melter, hoses, guns, and optional devices) from allpower sources before accessing any unprotected high-voltage wiring orconnection point.

1. Turn off the equipment and all auxiliary devices connected to theequipment (system).

2. To prevent the equipment from being accidentally energized, lock andtag the disconnect switch(es) or circuit breaker(s) that provide inputelectrical power to the equipment and optional devices.

NOTE: Government regulations and industry standards dictate specificrequirements for the isolation of hazardous energy sources. Refer tothe appropriate regulation or standard.

Safety1-8


Disabling the GunsAll electrical or mechanical devices that provide an activation signal to theguns, gun solenoid valve(s), or the melter pump must be disabled beforework can be performed on or around a gun that is connected to apressurized system.

1. Turn off or disconnect the gun triggering device (pattern controller, timer,PLC, etc.).

2. Disconnect the input signal wiring to the gun solenoid valve(s).

3. Reduce the air pressure to the gun solenoid valve(s) to zero; thenrelieve the residual air pressure between the regulator and the gun.

Safety 1-9


General Safety Warnings and CautionsTable 1-1 contains the general safety warnings and cautions that apply toNordson hot melt and cold adhesive equipment. Review the table andcarefully read all of the warnings or cautions that apply to the type ofequipment described in this manual.

Equipment types are designated in Table 1-1 as follows:

HM = Hot melt (melters, hoses, guns, etc.)

PC = Process control

CA = Cold adhesive (dispensing pumps, pressurized container, andguns)

Table 1-1 General Safety Warnings and Cautions

EquipmentType Warning or Caution

HM

WARNING: Hazardous vapors! Before processing any polyurethanereactive (PUR) hot melt or solvent-based material through acompatible Nordson melter, read and comply with the material’sMSDS. Ensure that the material’s processing temperature andflashpoints will not be exceeded and that all requirements for safehandling, ventilation, first aid, and personal protective equipment aremet. Failure to comply with MSDS requirements can cause personalinjury, including death.

HM

WARNING: Reactive material! Never clean any aluminum componentor flush Nordson equipment with halogenated hydrocarbon fluids.Nordson melters and guns contain aluminum components that mayreact violently with halogenated hydrocarbons. The use ofhalogenated hydrocarbon compounds in Nordson equipment cancause personal injury, including death.

HM, CA

WARNING: System pressurized! Relieve system hydraulic pressurebefore breaking any hydraulic connection or seal. Failure to relievethe system hydraulic pressure can result in the uncontrolled release ofhot melt or cold adhesive, causing personal injury.

HM

WARNING: Molten material! Wear eye or face protection, clothingthat protects exposed skin, and heat-protective gloves when servicingequipment that contains molten hot melt. Even when solidified, hotmelt can still cause burns. Failure to wear appropriate personalprotective equipment can result in personal injury.

Continued...

Safety1-10


General Safety Warnings and Cautions (contd)

Table 1-1 General Safety Warnings and Cautions (contd)


HM, PC

WARNING: Equipment starts automatically! Remote triggeringdevices are used to control automatic hot melt guns. Before workingon or near an operating gun, disable the gun’s triggering device andremove the air supply to the gun’s solenoid valve(s). Failure todisable the gun’s triggering device and remove the supply of air to thesolenoid valve(s) can result in personal injury.

HM, CA, PC

WARNING: Risk of electrocution! Even when switched off andelectrically isolated at the disconnect switch or circuit breaker, theequipment may still be connected to energized auxiliary devices.De-energize and electrically isolate all auxiliary devices beforeservicing the equipment. Failure to properly isolate electrical power toauxiliary equipment before servicing the equipment can result inpersonal injury, including death.

CA

WARNING: Risk of fire or explosion! Nordson cold adhesiveequipment is not rated for use in explosive environments and shouldnot be used with solvent-based adhesives that can create anexplosive atmosphere when processed. Refer to the MSDS for theadhesive to determine its processing characteristics and limitations.The use of incompatible solvent-based adhesives or the improperprocessing of solvent-based adhesives can result in personal injury,including death.

HM, CA, PC

WARNING: Allow only personnel with appropriate training andexperience to operate or service the equipment. The use of untrainedor inexperienced personnel to operate or service the equipment canresult in injury, including death, to themselves and others and candamage to the equipment.

Continued...

Safety 1-11



HM

CAUTION: Hot surfaces! Avoid contact with the hot metal surfacesof guns, hoses, and certain components of the melter. If contact cannot be avoided, wear heat-protective gloves and clothing whenworking around heated equipment. Failure to avoid contact with hotmetal surfaces can result in personal injury.

HM

CAUTION: Some Nordson melters are specifically designed toprocess polyurethane reactive (PUR) hot melt. Attempting to processPUR in equipment not specifically designed for this purpose candamage the equipment and cause premature reaction of the hot melt.If you are unsure of the equipment’s ability to process PUR, contactyour Nordson representative for assistance.

HM, CA

CAUTION: Before using any cleaning or flushing compound on or inthe equipment, read and comply with the manufacturer’s instructionsand the MSDS supplied with the compound. Some cleaningcompounds can react unpredictably with hot melt or cold adhesive,resulting in damage to the equipment.

HM

CAUTION: Nordson hot melt equipment is factory tested withNordson Type R fluid that contains polyester adipate plasticizer.Certain hot melt materials can react with Type R fluid and form a solidgum that can clog the equipment. Before using the equipment,confirm that the hot melt is compatible with Type R fluid.

Safety1-12


Other Safety Precautions� Do not use an open flame to heat hot melt system components.

� Check high pressure hoses daily for signs of excessive wear, damage,or leaks.

� Never point a dispensing handgun at yourself or others.

� Suspend dispensing handguns by their proper suspension point.

First AidIf molten hot melt comes in contact with your skin:

1. Do NOT attempt to remove the molten hot melt from your skin.

2. Immediately soak the affected area in clean, cold water until the hot melthas cooled.

3. Do NOT attempt to remove the solidified hot melt from your skin.

4. In case of severe burns, treat for shock.

5. Seek expert medical attention immediately. Give the MSDS for the hotmelt to the medical personnel providing treatment.

Safety 1-13


Special Safety Instructions

Safety Labels on the GunThe following safety labels are affixed to the adhesive gun:

WARNING: Risk of electrical shock. Failure to observe may result inpersonal injury, death, or equipment damage.

Safety Instructions in the ManualThe following pictographs and the respective safety instructions are used inthe manual:

WARNING: Risk of electrical shock. Failure to observe may result inpersonal injury, death, or equipment damage.

WARNING: Hot! Risk of burns. Wear heat-protective gloves.

WARNING: Hot! Risk of burns. Wear safety goggles and heat-protectivegloves.

WARNING: System or material pressurized. Relieve pressure. Failure toobserve may result in serious burns.

CAUTION: Non-observance can result in damage to the equipment oraccessories.

Safety1-14


This page intentionally left blank.

Description 2-1


Section 2Description

Intended UseThe LA 820 / LA 820 RC series liquid adhesive guns subsequently alsoreferred to as guns have been specially designed for the application ofwater-based adhesives. They can be used for non-contact glue application.

Any other use is considered unintended use. The manufacturer is not liablefor personal injury or property damage resulting from unintended use.

Intended use includes observing the manufacturer’s prescribed operating,maintenance and service regulations.

The product described here may only be operated, serviced and maintainedby persons who are familiar with the product and have been informed of thehazards involved.

The respective rules for prevention of accidents as well as any othercommonly recognized safety regulations and industrial health regulationsmust be observed.

Unintended Use Examples The adhesive guns may not be used under the following conditions:

� In a defective condition

� In a potentially explosive atmosphere

� When the housing is open or protective equipment is removed

� In surroundings which do not correspond to the unit’s Degree ofProtection

� With unauthorized modifications.

� The guns may not be used to process the following materials:

� Explosive and flammable materials

� Materials sensitive to pressure

� Food products.

Description2-2


Safety InstructionsPrior to installation and first operation of the system, it is essential to readand follow the safety instructions.

The general safety instructions are enclosed as an annex to thedocumentation folder or they are a section of this manual.

The specific safety instructions are part of this manual.

Residual RisksNordson knows of no residual risks.

General InformationThe electrically controlled adhesive guns are designed for the application ofwater-based adhesives. They are particularly suited to the fast, intermittent,non-contact application of adhesive.

After switching on the power to the coils inside the adhesive gun, the nozzleneedle is raised, thus opening the nozzle. When the power is switched off, aspring forces the needle down, closing the nozzle.

The needle stroke can be adjusted by means of an adjustable pole facewhich can even be turned during operation.

A mounting bracket is available which can secure the adhesive gun inpractically all working positions.

Updated Bill of MaterialThe mounting brackets described in this section relate to standard mountingbrackets where reference is not made to any other units. Individualapplications require individual solutions. In such cases, please contactNordson.

Refer to the updated Bill of Material enclosed with your equipment.

For further questions, please contact Nordson.

Description 2-3


FunctioningThe following figure illustrates the basic method of operation of an adhesivegun within a complete system.

Adhesive is to be applied to a substrate (7). The transport belts (8) conveythe substrates. When the leading edge of a substrate reaches the photocell(10), the beam of light sent is reflected and the program is started. Thecontrol unit compiles all the data according to the speed of the productionmachine. The encoder (4) is mechanically connected to the transportequipment via a gear and supplies one pulse per mm. The control unitevaluates all the data and establishes the point at which the liquid adhesiveguns (5) must be activated.

The pump (12) is connected to the compressed air supply (1). It operatescontinuously and pumps the liquid adhesive from the adhesive reservoir (11) to the liquid adhesive guns (5).

A current between 0-20 mA is supplied from the control unit (3) to theproportional pressure control valve (2). The strength of the current isdependent on the speed of the production machine. The strength of thecurrent determines how far the proportional pressure control valve (2)should be opened and the regulator (9) opens accordingly. The adhesiveflows to the liquid adhesive guns (5) and is applied to the substrate. Thelength of the application is defined by the control unit program.

Description2-4


Functioning (contd.)

1

2

3

4

5

6

7

8

9

10

12

11

O615

Electric

Compressed air

Adhesive

Fig. 2-1 Principle Drawing

1 Compressed air feed2 Proportional pressure control

valve3 Control unit4 Encoder

5 Liquid adhesive gun6 Adhesive pattern7 Substrate8 Transport belts

9 LA380 adhesive pressureregulator

10 Photocell11 Adhesive reservoir12 LA300 adhesive pump

Description 2-5


Method of OperationWhen a peak voltage is applied to the magnetic coil in the adhesive gun, theneedle in the module moves from its home position, thus opening thenozzle. A holding voltage retains the needle in this position. When theholding voltage is switched off, a correspondingly pretensioned springmoves the needle back and closes the opening.

Components

LA 820

1

5

7

9

2 3 4

6

8O616

Fig. 2-2 LA 820 Adhesive Gun

1 Adhesive connection2 Protective cap3 Electrical connection

4 Adjustable pole face5 Module6 Sleeve nut with nozzle

7 Manifold8 Mounting bracket9 Fixing screw

Description2-6


LA 820 RC LogiComm

1

5

7

8

2 3 4

6

O617

Fig. 2-3 LA 820 RC LogiComm Adhesive Gun

1 Adhesive connection with glue filter2 Protective cap3 Electrical connection

4 Adjustable pole face5 Module6 Nozzle

7 Manifold8 Fixing screw

LA 820 RC LA4xx

1

5

7

8

2 3 4

6

O618

Fig. 2-4 LA 820 RC LA4xx Adhesive Gun

1 Adhesive connection with glue filter2 Protective cap3 Electrical connection

4 Adjustable pole face5 Module6 Nozzle

7 Manifold8 Fixing screw

Installation 3-1


Section 3Installation

WARNING: Allow only qualified personnel to perform the following tasks.Observe and follow the safety instructions in this document and all otherrelated documentation.

WARNING: Disconnect power to the control unit before connecting coilleads. Failure to do so may result in death.

UnpackingUnpack carefully. Then check for any damage caused during shipping.Reuse packaging materials or dispose of properly according to localregulations.

The liquid adhesive gun is fully preassembled at the factory (refer toComponents in Section Description).

The LA 820 adhesive gun is supplied without a nozzle, whereas adhesiveguns of the type LA 820 RC are supplied with a nozzle.

TransportThe adhesive gun is a high precision, valuable part. Handle very carefully!Protect the nozzle from damage, e.g. with the original packaging.

StorageDo not store outside! Protect from humidity and dust. Do not lay the unit onthe nozzle. Protect the nozzle from damage, e.g. by placing it in the originalpackaging.

DisposalWhen your Nordson product has exhausted its purpose and/or is no longerneeded, dispose of it properly according to local regulations.

Installation3-2


InstallationDue to possible self-vibrations caused by intermittent operation, the liquidadhesive gun should be installed as firmly as possible.

The transmission of vibrations from the production machine to the gunshould be avoided as much as possible.

The guns should be installed in an easily accessible location because theyneed to be removed for cleaning and maintenance purposes.

NOTE: In general, a production machine refers to a machine in whichNordson equipment for adhesive application is integrated (e.g. a packingmachine). The term production machine means the same as parentmachine which may appear in other Nordson literature.

ConnectingThe connections used most frequently are described in the following. Insome cases, e.g. for enclosed operation or under clean room conditions,deviations from these instructions may be necessary.

Material LinesRemove the protective cap (2). Connect the material hose coming from thepressurized adhesive tank or pump to the adhesive connection (1) on theliquid adhesive gun.

Electrical LinesWARNING: Disconnect power to the control unit before connecting theelectrical lines. Failure to do so may result in death.

Connect the connection cable from the control unit to the connection socket(3) on the liquid adhesive gun.

Installation 3-3


O619

1

5

2 3 41

5

2 3 4

6

LA 820 LA 820 RC LogiComm

Fig. 3-1 Installing and Connecting the Adhesive Guns

1 Adhesive connection2 Protective cap

3 Electrical connection4 Adjustable pole face

5 Fixing screw6 Mounting bracket

O620

O621

Installation3-4


Setting the Adhesive Quantity, LA 820The adhesive pattern is influenced by the adhesive pressure andadhesive quantity. The adhesive pressure is determined by thepump control unit according to the application speed.

The adhesive gun is equipped with an adjustable pole face toadjust the adhesive quantity (4, Fig. 3-1). Turn the adjustablepole face counterclockwise using an Allen key to increase thequantity of adhesive. Reduce the quantity of adhesive by turningthe key clockwise.

Fig. 3-2The upper side of the adhesive gun (Fig. 3-1) is provided withreference points which indicate the setting of the adjustable poleface. Turning the adjustable pole face one graduation pointadjusts the needle stroke by 0.05 mm (0.00195”).

NOTE: The default needle stroke setting is 0.15 mm (0.0059”).To achieve this setting, turn the adjustable pole face to its bottomsetting and then 3 graduations back.

NOTE: Increasing the needle stroke reduces the maximumadhesive pressure. When operating at high speeds, the length ofthe adhesive bead is increased and, therefore, requires greatercompensation.

Setting the Adhesive Quantity, LA 820 RCThe adhesive pattern is influenced by the adhesive pressure andadhesive quantity. The adhesive pressure is determined by thepump control unit according to the application speed.

The LA 820 RC adhesive gun is equipped with an adjustablepole face to adjust the adhesive quantity (4, Fig. 3-1). Turn theadjustable pole face counterclockwise to increase the quantity ofadhesive. Reduce the quantity of adhesive by turning the keyclockwise.

Fig. 3-3Turning the adjustable pole face one click adjusts the needlestroke by 0.02 mm (0.00078”). The reference points are notapplicable.

NOTE: The default needle stroke setting is achieved by turningthe adjustable pole face down fully and then turning it back 8clicks. The adjustable pole face should be turned back amaximum of 10 clicks and a minimum of 4 clicks.

NOTE: Increasing the needle stroke reduces the maximumadhesive pressure. When operating at high speeds, the length ofthe adhesive bead is increased and, therefore, requires greatercompensation.

Installation 3-5


Mounting BracketsThe mounting bracket illustrated in Fig. 3-4 is available for securing theadhesive gun.

2

3

4

1

5

Fig. 3-4 Mounting Bracket with Adhesive Gun

1 Folding carton bracket, P/N 7301642, for gun LA820 RCand photocell LA650

2 Photocell LA650

3 Liquid adhesive gun LA820 RC4 Adapter for GD100 glue sensor,

P/N 7301636

5 Glue sensor GD100

Installation3-6


Operation 4-1


Section 4Operation


General Adhesive Processing InstructionsNOTE: The following information is particularly important for the processingof liquid adhesives but is also applicable to other materials:

� Always pre-test the product before applying it for its ultimate purpose.

� The surface to be bonded should be at room temperature and free ofdust, grease and moisture.

� The suitability of material, optimum working conditions and anynecessary pre-treatment of the substrate must be determined by testing.

� Some substrates contain softeners and other components which maybecome volatile later. Occasionally, surfaces are covered with wax,isolating oil, etc. The bonding may fail immediately or later ifpre-treatment/tests are not carried out.

NOTE: Observe any comment sheets concerning the process to thematerial used.

Compatibility of Different Types of AdhesivesNOTE: Not all types of liquid adhesive are compatible. The adhesive maybecome degraded if improperly used, resulting in functional faults and,possibly, equipment damage.

In our capacity as suppliers of adhesive guns, we assume no liability fordamage to equipment, hoses and guns caused by the hardening ofadhesive through improper handling.

In case of doubt and/or intended change of adhesive, please contact theadhesive supplier, us or one of our representatives.

Operation4-2


Switching Off in an EmergencyFamiliarize yourself thoroughly in respect of behavior in emergencysituations and with the location and activation of the Emergency Stopoperating elements installed in the production area.

WARNING: Press the Emergency Stop switch immediately in anyemergency situation.

1. Trigger the nearest EMERGENCY STOP element (EMERGENCY STOPbutton, EMERGENCY STOP ripcord or main switch with EMERGENCYSTOP function).

2. Locate and clear the cause of the Emergency Stop situation beforeswitching the system on again.

Initial Startup1. Set the air pressure on the pump so that the max. hydraulic pressure is

not exceeded.

Liquid adhesive gun Max. hydraulic pressure

LA 820 20 bar (290 PSI)

LA 820 RC 25 bar (362 PSI)

NOTE: A higher pressure may damage the liquid adhesive gun.

2. Place a collecting vessel underneath the gun and switch on the controlunit.

3. Setup the control unit so that the adhesive flows out of the gun nozzleevenly and without any air bubbles.

4. Carry out test gluing and check the adhesive bead. If a thicker bead isrequired, the pressure can be increased but not in excess of themaximum hydraulic pressure.

Daily Startup1. Check whether there is sufficient adhesive in the reservoir.

2. Release the air pressure for the pump.

Daily Shutdown1. Shut off the compressed air supply to the pump (reduce to 0 bar).

2. Close the nozzle orifices with silicone paste, Nordson P/N 311 642.

Maintenance 5-1


Section 5Maintenance


The adhesive gun is easy to maintain and, in general, maintenance-free.Under normal conditions, all the components have a long service life.

WARNING: Disconnect the power supply!

WARNING: Shut off the adhesive supply.

WARNING: When possible, always wear protective gloves when carryingout the work.

Always observe the following basic points:

� Ensure that the material to be applied is in a clean, filtered condition.

� Individual operating conditions and different application materials requirea corresponding minimum effort for maintenance.

� Do not use metallic, sharp-edged tools to clean the outside of theequipment, e.g. nozzle tips, only use soft brushes.

� When carrying out repair or maintenance work, keep the working spaceas well as the gun to be repaired as clean as possible.

� Adhesive guns which are soiled should be thoroughly flushed throughwhen the opportunity occurs. This is possible particularly when thenozzle needle or material nozzles need to be replaced.

� The adhesive guns should not remain installed for any importantmaintenance work but be removed from the machine.

� Depressurize the material supply lines beforehand.

Maintenance5-2


Preventive Maintenance

Cleaning the Liquid Adhesive GunIt is not necessary to clean the adhesive gun if air is prevented fromentering into the hydraulic system and coming into contact with the glue. Ifthis occurs, however, the glue starts to solidify after approx. 30 minutes. Theprecise time varies according to the adhesive used. Blocked nozzle orificesor guns can be cleaned easily at any time.

NOTE: Do not disassemble an adhesive gun in which glue has solidified! Itis highly likely this would damage sensitive components.

We recommend immersing the adhesive gun in warm water for 1-2 days tosoften the glue. Repeat the process several times, if necessary. If theadhesive gun still cannot be disassembled, return it to us for repair.

Regular MaintenanceWe recommend flushing the liquid adhesive guns with water twice a year.The guns should always be kept clean, residual glue and dirt being removeddaily.

Maintenance 5-3


Disassembling the LA 820 Liquid Adhesive GunWARNING: Disconnect the power supply.

WARNING: The system and material are pressurized. Shut off thecompressed air supply! Otherwise, there is a considerable risk of injury.

Refer to figure 5-1.

1. Prepare a vessel with water.

2. Ensure that the working area and all the tools are clean.

NOTE: Foreign bodies can damage gaskets and seal fits causing leaks.

3. Place a collecting vessel under the application head.

4. Disconnect the adhesive hose from the adhesive connection (14). Sealthe adhesive hose with adhesive tape or plugs so that no adhesive canescape.

5. Loosen the two fixing screws (13) and remove the manifold (12) fromthe adhesive gun. Remove the sealing ring (11).

6. Remove the sleeve nut (10).

7. Remove the seat (9).

8. Remove the O-ring (8) from the seat.

9. Remove the needle (7) and compression spring (6) from the adhesivegun.

10. Screw the adjustable pole face (3) from the adhesive gun and removethe compression spring (5) and washer (2).

11. Remove the O-ring (4) from the adjustable pole face.

12. Clean all parts with water.

NOTE: The electrical coils and electrical connection cannot be removed.

WARNING: Do not remove the hollow bolt (15) from the housing. Theadhesive gun would be damaged as a result.

Maintenance5-4


1

6

11

13

2 3 4 5

7

8

9

10

12

14

15

O623

Fig. 5-1 Disassembling the LA 820 Liquid Adhesive Gun

1 Housing2 Washer3 Adjustable pole face4 O-ring5 Compression spring

6 Compression spring7 Needle8 O-ring9 Seat

10 Sleeve nut

11 Sealing ring12 Manifold13 Fixing screw14 Hose nipple15 Hollow bolt

Maintenance 5-5


Disassembling the LA 820 RC Liquid Adhesive GunThe instructions for disassembling the adhesive gun apply to the LA 820 RCLA4xx and LA 820 RC Logicomm liquid adhesive guns.

WARNING: Disconnect the power supply.

WARNING: The system and material are pressurized. Shut off thecompressed air supply! Otherwise, there is a considerable risk of injury.


1. Prepare a vessel with water.

2. Ensure that the working area and all the tools are clean.

NOTE: Foreign bodies can damage gaskets and seal fits causing leaks.

3. Place a collecting vessel under the application head.

4. Disconnect the adhesive hose from the adhesive connection (11). Sealthe adhesive hose with adhesive tape or plugs so that no adhesive canescape.

5. Loosen the two fixing screws (10) and remove the manifold (9) from theadhesive gun. Remove the sealing ring (8).

6. Unscrew the nozzle (7).

7. Remove the O-ring (6) from the nozzle.

8. Remove the needle (5) and compression spring (4) from the adhesivegun.

9. Unscrew the adjustable pole face (2) from the adhesive gun.

10. Remove the O-ring (3) from the adjustable pole face.

11. Clean all parts with water.

NOTE: The electrical coils and electrical connection cannot be removed.

NOTE: The adjustable pole face cannot be disassembled.

WARNING: Do not remove the hollow bolt (13) from the housing. Theadhesive gun would be damaged as a result.

Maintenance5-6


1 2 3

5

6

7

89

11

10

12

13

4

Fig. 5-2 Disassembling the LA 820 RC Liquid Adhesive Gun

1 Housing2 Adjustable pole face3 O-ring4 Compression spring

5 Needle6 O-ring7 Nozzle8 Sealing ring

9 Manifold10 Fixing screw11 Hose nipple12 Protection plug13 Hollow bolt

Maintenance 5-7


Assembling the LA 820 Liquid Adhesive GunRefer to figure 5-1.

1. Install the O-ring (8) on the seat (9).

2. Insert the compression spring (6) on the needle (7) and slide the needlein the adhesive gun.

3. Screw the seat in the adhesive gun.

4. Slide the O-ring (4) on the adjustable pole face (3).

5. Apply a little Vaseline or non-corrosive grease on the O-ring (4).

6. Slide the washer (2) and compression spring (5) on the adjustable poleface (3). Screw the adjustable pole face in the adhesive gun.

7. Use an Allen key to turn the adjustable pole face clockwise until it isfixed in place.

NOTE: Turn the adjustable pole face 3 graduations counterclockwise: Thestroke set is now 0.15 mm (0.0059”).

8. Insert the nozzle in the sleeve nut (10) and screw the sleeve nut firmly tothe housing.

Assembling the LA 820 RC Liquid Adhesive GunThe instructions for assembling the adhesive gun apply to the LA 820 RCLA4xx and LA 820 RC Logicomm liquid adhesive guns.


1. Install the O-ring (6) on the nozzle (7).

2. Insert the compression spring (4) on the needle (5) and slide the needlein the adhesive gun.

3. Screw the nozzle in the adhesive gun.

4. Slide the O-ring (3) on the adjustable pole face (2).

5. Apply a little Vaseline or non-corrosive grease on the O-ring (3).

6. Screw the adjustable pole face in the adhesive gun and fix using awrench.

NOTE: The default needle stroke setting is achieved by turning theadjustable pole face down fully and then turning it back 8 clicks.

WARNING: If the adjustable pole face is not unscrewed counterclockwisefar enough the needle may be damaged.

Maintenance5-8


Troubleshooting 6-1


Section 6Troubleshooting


The adhesive guns are easy to maintain and generally maintenance-free.When used for their intended purpose, all the elements have a long servicelife.

WARNING: Disconnect the power supply!

WARNING: Shut off the adhesive supply.

WARNING: When possible, always wear protective gloves when carryingout the work.

Always observe the following basic points:

� Ensure that the material to be applied is in a clean, filtered condition.The control air should also be clean when supplied to the equipment.

� Individual operating conditions and different application material requirea corresponding minimum effort for maintenance.

� Do not use metallic, sharp-edged tools to clean the outside of theequipment, e.g. nozzle tips, only use soft brushes.

� When carrying out repair or maintenance work, keep the working spaceas well as the gun to be repaired as clean as possible.

� Adhesive guns which are soiled should be thoroughly flushed throughwhen the opportunity occurs. This is possible particularly when thenozzle needle, gaskets or material nozzles need to be replaced.

� The adhesive guns should not remain installed for any importantmaintenance work but be removed from the machine.

� Depressurize the pressure and material supply lines beforehand.

Troubleshooting6-2


NOTE: For disassembly instructions: Refer to Section 5

Problem Possible Cause Corrective Action

Liquid adhesivegun does notapply any glue

Operating pressure toohigh

Check operating pressure of hydraulic system. If thepressure is higher than 20 bar (290 PSI) in the caseof the LA 820, or higher than 25 bar (362 PSI) in thecase of the LA 820 RC models, the needle may notopen. Reduce the pressure.

Solidified glue Remove the seat or nozzle, needle and adjustablepole face from the adhesive gun and check for anyresidual adhesive. Clean the elements under cold,running water.NOTE: Never use sharp or metallic tools forcleaning. They may damage the metallic parts.

Needle stroke too large Reduce the needle stroke using the adjustable poleface. To do this, switch the adhesive gun off and oncontinuously while turning the adjustable pole faceclockwise.

Nozzles clogged Clean the nozzles.


Adhesive leaksfrom nozzle

Solidified glue on the seat,in the nozzle or on theneedle.

Remove the seat or nozzle, needle and adjustablepole face from the adhesive gun and check for anyresidual adhesive. Clean the elements under cold,running water.NOTE: Never use sharp or metallic tools forcleaning. They may damage the metallic parts.

Needle, seat or nozzleworn

Replace the needle, seat or nozzle.


Adhesiveapplication longerthan that set oncontrol unit

Adhesive gun soiled Disassemble the adhesive gun and check for residualadhesive. Clean the elements under cold, runningwater.NOTE: Never use sharp or metallic tools forcleaning. They may damage the metallic parts.

Parts 7-1


Section 7Parts

Introduction1. Locate the reference position of the part to be replaced in the illustration

and note the ID number.

2. Locate the ID number matching that in the illustration in the first columnof the relevant table. If the ID number is not contained in the table, itdoes not relate to a standard spare part. It is possible that it belongs to akit.

3. The following columns contain the spare part numbers and possibly adescription or name of the part.

Updated Bill of Material

Please observe that your unit may differ slightly from the description orsome information details in the manual. Refer to the updated Bill of Materialenclosed with your equipment.

Parts7-2


Parts

Liquid Adhesive Gun, LA 820 - 7/16-20 UNF

2

1

2

4

6

2

5

3

7

8

Loctite 542

O625

Fig. 7-1 Liquid Adhesive Gun, LA 820 - 7/16-20 UNF

Parts 7-3


Item Part Description Quantity

7301322 Gun, LA 820 - 7/16-20 UNF 1

1 375327 Protection plug, 7/16-20 UNF 1

2 7301326 LA 820 module (refer to Module, Liquid Adhesive Gun, LA 820) 1

3 Nozzle (refer to Nozzle Kit, Liquid Adhesive Gun, LA 820) 1

4 375298 Manifold, LA 820 1

5 311037 Screw allenhead, M4x20, stainless 2

6 311038 Screw, allenhead, M4x30, stainless 2

7 375299 Bracket, 22 style 1

8 375300 Hose nipple, 7/16-20 UNF - 1/8 BSP 1

Parts7-4


Liquid Adhesive Gun, LA 820 - 1/2-20 UNF

2

1

2

4

6

2

5

3

7

Loctite 542

O626

Fig. 7-2 Liquid Adhesive Gun, LA 820 - 1/2-20 UNF

Parts 7-5



7301324 Gun, LA 820 - 1/2-20 UNF 1


2 377673 LA 820 module (refer to Module, Liquid Adhesive Gun, LA 820) 1

3 Nozzle (refer to Nozzle Kit, Liquid Adhesive Gun, LA 820) 1

4 375298 Manifold, LA 820 1



7 372570 Hose nipple, 1/2-20 UNF - 1/8 BSP 1

Parts7-6


Liquid Adhesive Gun, LA 820 RC LogiComm

1

2

3

4

5

6

Fig. 7-3 Liquid Adhesive Gun, LA 820 RC LogiComm

Parts 7-7



7301424 Gun, LA 820 RC LogiComm, 0.30 1





2 Module, LA 820 RC LogiComm (refer to Module, LiquidAdhesive Gun, LA 820 RC LogiComm)

1

3 375298 Manifold, LA 820 1



6 372570 Hose nipple, 1/8 BSP-1/2 20 UNF 1

Parts7-8


Liquid Adhesive Gun, LA 820 RC LA4xx

1

2

3

4

5

6

Fig. 7-4 Liquid Adhesive Gun LA 820 RC LA4xx

Parts 7-9



7301428 Gun, LA 820 RC LA4xx, 0.30 1

7301429 Gun, LA 820 RC LA4xx, 0.35 1

7301430 Gun, LA 820 RC LA4xx, 0.40 1

7301431 Gun, LA 820 RC LA4xx, 0.50 1


2 Module, LA 820 RC LA4xx (refer to Module, Liquid AdhesiveGun, LA 820 RC LA4xx)

1

3 375298 Manifold, LA 820 1



6 372570 Hose nipple, 1/8 BSP-1/2 20 UNF 1

Parts7-10


Module, Liquid Adhesive Gun, LA 820 for LA 4xx

1

6

2 3 4 5

7

8

9

10

11

O629

Fig. 7-5 Module, Liquid Adhesive Gun, LA 820 for LA 4xx

Parts 7-11



7301326 Module, LA 820, LA 4xx 1

1 377211 Adjustable pole face, LA 820 1

2 7300340 Ring, rigid plastic 1

3 375291 O-ring, 6 x 1 1

4 7300338 Compression spring 1

5 375283 Solenoid Assy, LA 820 1


7 Needle armature 1

8 377636 O-ring 1

9 Seat 1

10 375297 Sleeve nut 1

11 311478 O-ring, 2.9 x 1.78 1

Parts7-12


Module, Liquid Adhesive Gun, LA 820 RC LogiComm

1

6

4

5

2

3

7

O630

Fig. 7-6 Module, Liquid Adhesive Gun, LA 820 RC LogiComm

Parts 7-13



7301331 Module, LA 820 RC LogiComm, 0.30 1




1 7300566 Solenoid assy, LA 820 RC LogiComm, with adjustable polepiece

1

2 7301747 O-ring, 7.2 x 1.2, Viton 70 1

3 Nozzle (refer to Nozzles, Liquid Adhesive Gun LA 820 RC) 1

4 311478 O-ring, 2.8 x 1.78 1

5 Needle armature (refer to Needle and Nozzle Kit, LiquidAdhesive Gun, LA 820 RC)

1


7 7301036 Solenoid assy, LA 820 RC LogiComm, without adjustablepole piece

1

Parts7-14


Module, Liquid Adhesive Gun, LA 820 RC LA4xx

1

6

4

5

2

3

7

O631

Fig. 7-7 Module, Liquid Adhesive Gun, LA 820 RC LA4xx

Parts 7-15



7301330 Module, LA 820 RC LA4xx, 0.30 1

7301332 Module, LA 820 RC LA4xx, 0.35 1

7301334 Module, LA 820 RC LA4xx, 0.40 1

7301336 Module, LA 820 RC LA4xx, 0.50 1

1 7300689 Solenoid assy, LA 820 RC LA4xx, with adjustable pole piece 1

2 7301747 O-ring, 7.2 x 1.2 1

3 Nozzle (refer to Nozzles, Liquid Adhesive Gun LA 820 RC) 1

4 311478 O-ring, 2.8 x 1.78 1

5 Needle armature (refer to Needle and Nozzle Kit, LiquidAdhesive Gun, LA 820 RC)

1


7 375283 Solenoid assy, LA 820 RC LA4xx, without adjustable polepiece

1

Parts7-16


Filter Ass’y, Liquid Adhesive Gun, LA 820 RC

1

1

3

2

O632

Fig. 7-8 Filter Ass’y, Liquid Adhesive Gun, LA 820 RC


7300530 Filter assy, 75 mesh, 1/8 BSP-1/2 20 UNF 1

1 Filter subassy, 1/8 BSP-1/2 20 UNF 1

2 7300532 Filter cartridge, 75 mesh, stainless 1

3 7300531 O-ring, 10.82x1.78 1

Parts 7-17


Nozzles, Liquid Adhesive Gun, LA 820


- 374760 Bead nozzle long engagement diam. 0.3 mm 1







374755 Set, gasket replacement kit, 10 pc. 1

Nozzles, Liquid Adhesive Gun, LA 820 RC


- 7300536 Nozzle, 0.30 mm 1

- 7300537 Nozzle, 0.35 mm 1

- 7300538 Nozzle, 0.40 mm 1

- 7301195 Nozzle, 0.50 mm 1

Parts7-18


Manifold for 2 Liquid Adhesive Guns, LA 820 - 7/16-20 UNF, Stackable

LA820-11-A (a0494)

1

6

2

3

4

7

6

7

5

Fig. 7-9 Manifold for 2 Liquid Adhesive Guns, LA 820 7/16-20 UNF, Stackable

Parts 7-19



375320 Manifold, Stackable, LA 820, Kit 2 guns, 7/16-20 UNF 1

1 Blind plug, M8x0.75 1

2 375326 O-ring 4

3 375307 Hollow Bolt M8x0.75 1

4 375305 Manifold, Stackable, LA 820 2

5 375306 Hose nipple 7/16-20 UNF - M8x0.75 1

6 311037 Screw allenhead M4x20 stainless 4

7 311038 Screw, allenhead M4x30 stainless 4

Parts7-20


Manifold for 2 Liquid Adhesive Guns, LA 820 - 1/2-20 UNF, Stackable

LA820-12-A (a0494)

1

6

2

3

4

7

6

7

5

Fig. 7-10 Manifold for 2 Liquid Adhesive Guns, LA 820 1/2-20 UNF, Stackable

Parts 7-21



375321 Manifold, Stackable, LA 820, Kit 2 guns, 1/2-20 UNF 1

1 375308 Blind plug, M8x0.75 1

2 375326 O-ring 4



5 375309 Hose nipple 1/2-20 UNF - M8x0.75 1



Parts7-22


Manifold for Additional Liquid Adhesive Gun LA 820, Stackable

1

2

3

4

5

LA820-13-A (a0495)

Fig. 7-11 Manifold for Additional Liquid Adhesive Gun LA 820, Stackable

Parts 7-23



375322 Manifold, Stackable, LA 820 Extension 1 gun 1


2 375326 O-ring 2




Parts7-24


Kits

Nozzle Kit, Liquid Adhesive Gun, LA 820

LA820-20-A

2

1

Fig. 7-12 Nozzle Kit, Liquid Adhesive Gun, LA 820


1 - Nozzle (refer to Nozzles, Liquid Adhesive Gun, LA 820) 1

2 - Gasket 1

Parts 7-25


Upgrade Kit from Liquid Adhesive Guns LA 820 to LA 820 RC

1

2

O633

Fig. 7-13 Upgrade Kit from Liquid Adhesive Guns LA 820 to LA 820 RC


7301354 Upgrade Kit LA 820 to LA 820 RC 0.30 mm 1




1 7300560 Stroke adjustment mechanism 1

2 Needle & nozzle kit, LA 820 RC, 0.30 mm (refer to Needleand Nozzle Kit, LA 820 RC)

1

Needle & nozzle kit, LA 820 RC, 0.35 mm (refer to Needleand Nozzle Kit, LA 820 RC)

1


1


1

Parts7-26


Needle and Nozzle Kit, Liquid Adhesive Gun, LA 820

3

2

1

4

O634

Fig. 7-14 Needle and Nozzle Kit, Liquid Adhesive Gun, LA 820


1 - 4 7301263 LA 820 Needle and seal kit complete 1

Parts 7-27


Needle and Nozzle Kit, Liquid Adhesive Gun, LA 820 RC

21

4

3

2

O635

Fig. 7-15 Needle and Nozzle Kit, Liquid Adhesive Gun, LA 820 RC


7301358 Needle & nozzle kit, LA 820 RC, 0.30 mm 1





2 Needle, armature 1

3 7301747 O-ring, 7.2 x 1.2 1

4 7300536 Nozzle, LA 820 RC, 0.30 mm 1

7300537 Nozzle, LA 820 RC, 0.35 mm 1

7300538 Nozzle, LA 820 RC, 0.40 mm 1

7301195 Nozzle, LA 820 RC, 0.50 mm 1

Parts7-28


Seal Kit, Liquid Adhesive Gun, LA 820

1

23

O636

Fig. 7-16 Seal Kit, Liquid Adhesive Gun, LA 820


1 - 3 375319 Seal kit, Viton 70 1

2 377403 Seal, 2.9 x 1.78, chem. resistant, Kalrez 4078 1

Parts 7-29


Accessories

Power Cables


- 377377 Cable, LA 820 to WM 408 or LA 404-2, 5 m 1

- 377378 Cable, LA 820 to LA4xx, 5 m 1

- 377379 Cable, LA 820 hardwiring, 10 m 1

- 377380 Cable, lockable, LA 820 to WM 408 or LA 404-2, 10 m 1

- 377381 Cable, lockable, LA 820 to LA4xx, 10 m 1

- 7302530 Cable, LogiComm to LA 820 RC LogiComm, 2.5 m 1

- 7302531 Cable, LogiComm to LA 820 RC LogiComm, 5 m 1

- 7302532 Cable, LogiComm to LA 820 RC LogiComm, 10 m 1

- 7301617 Cable, splitter to drive two LogiComm guns at one channel 1

- 7301663 Cable, LA 820 to LA 404, 7 m 1

Adhesive Connection Adapter


- 7300017 Reducer, 1/2-20 female 7/16-20 male 1

Parts7-30


Technical Data 8-1


Section 8Technical Data

General DataLiquid adhesive gun type: LA 820 / LA 820 RC

Peak voltage durationLA4xx / LA 404-2:LogiComm (Universal Gun Driver):WM 408 driver board:SD electric gun driver:

1.8 ms0.8 ms at 1.6 A1.8 ms0.7 ms

Holding voltage (VDC) / Holding current (A):LA4xx / LA 404-2:LogiComm (Universal Gun Driver):WM 408 driver board:SD electric gun driver:

5 VDC0.4 A0.4 A0.4 A

Adhesive connection: LA 820: 1/2-20 UNF or7/16-20 UNFLA 820 RC: 1/2-20 UNF

Viscosity range*1: To 1500 mPas(Linear to 1200 MPas)

Minimal up-time*2

LA4xx / LA 404-2:WM 408 driver board:SD electric gun driver:

1 ms1 ms1.2 ms

Minimal down-time*2

LA4xx / LA 404-2:WM 408 driver board:SD electric gun driver:

1 ms1 ms1.6 ms

Adhesive pressure (max.):LA4xx / LA 404-2:WM 408 driver board:SD electric gun driver:

LA 820: LA820 RC:20 bar 25 bar18 bar 25 bar18 bar 25 bar

Continuous cycle rate (max.):LA4xx / LA 404-2:WM 408 driver board:SD electric gun driver:

70 Hz70 Hz20 Hz

IP class IP 65

NOTE: *1 The linearity is dependent on the reology of the adhesive. The viscosity is measured according to theBrookfield method.

NOTE: *2 The time is heavily dependent on the adhesive and only serves as a guideline value. The minimum up-time isrelated to the bead length, the minimum down-time to the distance between two beads (the stitch).

NOTE: 1 bar = 14.5 PSI = 105Pa 0.4536 kg = 1 lb 9 x °C/5 +32 = °F

NOTE: 25.4 mm = 1 in. 1 cP = 1 mPa s = 1 mNs/m2

Technical Data8-2


Dimensions

Liquid Adhesive Gun, LA 820

19,5

(0.7

6 in

.)

29.7 mm

51 mm (2.0 in.)19

mm

(0.7

4 in

.)7.

5 m

m

76.2

mm

(3.

00 in

.)

89.2

mm

(3.

51 in

.)

82.5

mm

(3.

25 in

.)

29 mm(1.14 in.)

23.5 mm(0.96 in.)

52.5 mm (2.07 in.)

64.5 mm (2.54 in.)

72.5 mm (2.85 in.)

(1.16 in.)(0

.30

in.)

O639

Fig. 8-1 Liquid Adhesive Gun, LA 820

Technical Data 8-3


Liquid Adhesive Gun, LA 820 RC

19.5

mm

(0.7

6 in

.)

29.7 mm

51 mm (2.0 in.)

92.1

mm

(3.

63 in

.)

122.

6 m

m (

4.83

in.)

29 mm

(1.14 in.)

(1.16 in.)

Fig. 8-2 Liquid Adhesive Gun, LA 820 RC

Technical Data8-4


Mounting Bracket, Liquid Adhesive Gun, LA 820 RC

521

mm

(20

,51

in.)

23 mm

(0,91 in.) 350 mm (13.78 in.)

257 mm (10.12 in.)

150 mm (5.91 in.)

Fig. 8-3 Mounting Bracket, Liquid Adhesive Gun, LA 820 RC

Folding carton bracket for liquid adhesive gun LA820 RC and photocellLA650, P/N 7301642, with adapter P/N 7301636 for GD100 sensor.

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