LA 820 / LA 820 RC Liquid Adhesive Gun

Liquid Adhesive Gun Manual English NORDSON BENELUX MAASTRICHT THE NETHERLANDS

Order number P/N = Order number for Nordson products Notice This 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 the prior written consent of Nordson Corporation. The information contained in this publication is subject to change without notice. 2007 All rights reserved. Trademarks AccuJet, 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. 2007 Nordson Corporation

Table of Contents I 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 2007 Nordson Corporation

II Table of Contents 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 2007 Nordson Corporation

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 7-25 Needle 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 2007 Nordson Corporation

IV Table of Contents 2007 Nordson Corporation

Introduction O-1 Nordson International http://www.nordson.com/directory Europe Country Phone Fax Austria 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 46-40680 1700 46-40-932 882 Switzerland 41-61-411 3838 41-61-411 3818 United Kingdom 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 2007 Nordson Corporation All rights reserved NI_EN_M-0307

O-2 Introduction Outside Europe / Hors d Europe / Fuera de Europa For your nearest Nordson office outside Europe, contact the Nordson offices below for detailed information. Pour toutes informations sur représentations de Nordson dans votre pays, veuillez contacter l un de bureaux ci-dessous. Para obtener la dirección de la oficina correspondiente, por favor diríjase a unas de las oficinas principales que siguen abajo. Contact Nordson Phone Fax Africa / Middle East DED, Germany 49-211-92050 49-211-254 658 Asia / Australia / Latin America Pacific South Division, USA 1-440-685-4797 Japan North America Japan 81-3-5762 2700 81-3-5762 2701 Canada 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 NI_EN_M0307 2007 Nordson Corporation All rights reserved

Introduction 0-3 General Hot Melt Material Processing Instructions NOTE: Before processing hot melt material, carefully read the material manufacturer s Material Safety Data Sheet (MSDS) or material information sheet. Nordson supplies only general processing instructions and is not liable for hazards associated with or damage caused by the use of hot melt material. Storage Store the material in dry areas at room temperature. Keep it in covered, dust-protected containers. Preparations for Material Application/Coating Keep the substrate at room temperature, dry, and free of dust and grease. Perform tests to determine the suitable hot melt material, optimum operating conditions, and preliminary treatment of the substrate for the application. Some substrates contain plasticizers and other ingredients which dissipate over time. In some cases, surfaces are treated with waxes, anti-stick oils, etc. Without adequate pretreatment, the hot melt bond in these applications may be defective at the time of dispensing. Processing Temperature The application temperature of the hot melt material at the nozzle is crucial for effective bonds. Refer to the material manufacturer s MSDS or material information sheet. Avoid unnecessary thermal stress. If the work is interrupted, reduce the melting temperature. Avoid heating the hot melt material above the prescribed processing temperature. Higher temperatures may cause charring of the hot melt material. This results in downtime. In addition, material may generate dangerous vapors at excessively high temperatures. Remove these vapors by using appropriate exhaust systems. 1994 Nordson Corporation HMIPUR01_EN_B1294

0-4 Introduction Danger of Burns Be careful when using hot melt materials. These materials are solid at room temperature. For proper application, they may be heated to temperatures of up to 230 C (450 F). Refer to the safety instructions in the Safety section. Mixing Hot Melt Materials Avoid mixing different hot melt materials. Refer to Changing the Hot Melt Material in the Maintenance section. Disposal of Hot Melt Material Refer to the supplier s MSDS or material information sheet. Additional Note for Polyurethane (PUR) When processing Polyurethane-type hot melt materials (PUR), you must follow these additional instructions carefully: Use appropriate respiratory equipment when material vapors exceed permissible limit values. If prescribed by the material manufacturer, pressurize the applicator s tank with an inert gas blanket. During production breaks, set the temperature back and close the gun nozzles temporarily with vaseline or dip them into another suitable oil. Do not empty the tank completely. PUR material residues in bores may cure. Before longer standstill periods, purge the system with a fluid recommended by the material manufacturer. HMIPUR01_EN_B1294 1994 Nordson Corporation

Safety 1-1 Section 1 Safety Read this section before using the equipment. This section contains recommendations and practices applicable to the safe installation, operation, and maintenance (hereafter referred to as use ) of the product described in this document (hereafter referred to as equipment ). Additional safety information, in the form of task-specific safety alert messages, appears as appropriate throughout this document. WARNING: Failure to follow the safety messages, recommendations, and hazard avoidance procedures provided in this document can result in personal injury, including death, or damage to equipment or property. Safety Alert Symbols The following safety alert symbol and signal words are used throughout this document to alert the reader to personal safety hazards or to identify conditions that may result in damage to equipment or property. Comply with all 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 potentially hazardous situation that, if not avoided, can result in damage to equipment or property. 2004 Nordson Corporation A1EN01[XXSAFE]10

1-2 Safety Responsibilities of the Equipment Owner Equipment owners are responsible for managing safety information, ensuring that all instructions and regulatory requirements for use of the equipment 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, and this document. Make safety information available to equipment users in accordance with governing regulations. Contact the authority having jurisdiction for information. Maintain safety information, including the safety labels affixed to the equipment, 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 best industry practices. If applicable, receive approval from your facility s engineering or safety department, or other similar function within your organization, before installing or operating the equipment for the first time. Provide appropriate emergency and first aid equipment. Conduct safety inspections to ensure required practices are being followed. Re-evaluate safety practices and procedures whenever changes are made to the process or equipment. A1EN01[XXSAFE]10 2004 Nordson Corporation

Safety 1-3 User Qualifications Equipment owners are responsible for ensuring that users: Receive safety training appropriate to their job function as directed by governing regulations and best industry practices Are familiar with the equipment owner s safety and accident prevention policies and procedures Receive, equipment- and task-specific training from another qualified individual NOTE: Nordson can provide equipment-specific installation, operation, and maintenance training. Contact your Nordson representative for information Possess industry- and trade-specific skills and a level of experience appropriate to their job function Are physically capable of performing their job function and are not under the influence of any substance that degrades their mental capacity or physical capabilities 2004 Nordson Corporation A1EN01[XXSAFE]10

1-4 Safety Applicable Industry Safety Practices The following safety practices apply to the use of the equipment in the manner described in this document. The information provided here is not meant to include all possible safety practices, but represents the best safety practices for equipment of similar hazard potential used in similar industries. Intended Use of the Equipment Instructions and Safety Messages 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 on material compatibility or the use of non-standard auxiliary devices. Read and follow the instructions provided in this document and other referenced documents. Familiarize yourself with the location and meaning of the safety warning labels and tags affixed to the equipment. Refer to Safety Labels and Tags (if available) at the end of this section. If you are unsure of how to use the equipment, contact your Nordson representative for assistance. A1EN01[XXSAFE]10 2004 Nordson Corporation

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 be used and that the processing characteristics of the material will not create a hazardous environment. Refer to the Material Safety Data Sheet (MSDS) for the material. If the required installation configuration does not match the installation instructions, contact your Nordson representative for assistance. Position the equipment for safe operation. Observe the requirements for clearance between the equipment and other objects. Install lockable power disconnects to isolate the equipment and all independently powered auxiliary devices from their power sources. Properly ground all equipment. Contact your local building code enforcement agency for specific requirements. Ensure that fuses of the correct type and rating are installed in fused equipment. Contact the authority having jurisdiction to determine the requirement for installation 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 required environmental conditions exist. Use the personal protective equipment (PPE) specified for each task. Refer to Equipment Safety Information or the material manufacturer s instructions and MSDS for PPE requirements. Do not use equipment that is malfunctioning or shows signs of a potential malfunction. 2004 Nordson Corporation A1EN01[XXSAFE]10

1-6 Safety Maintenance and Repair Practices Perform scheduled maintenance activities at the intervals described in this document. Relieve system hydraulic and pneumatic pressure before servicing the equipment. De-energize the equipment and all auxiliary devices before servicing the equipment. Use only new or factory-authorized refurbished replacement parts. Read and comply with the manufacturer s instructions and the MSDS supplied with equipment cleaning compounds. NOTE: MSDSs for cleaning compounds that are sold by Nordson are available at www.nordson.com or by calling your Nordson representative. Confirm the correct operation of all safety devices before placing the equipment back into operation. Dispose of waste cleaning compounds and residual process materials according to governing regulations. Refer to the applicable MSDS or contact the authority having jurisdiction for information. Keep equipment safety warning labels clean. Replace worn or damaged labels. A1EN01[XXSAFE]10 2004 Nordson Corporation

Safety 1-7 Equipment Safety Information This equipment safety information is applicable to the following types of Nordson equipment: hot melt and cold adhesive application equipment and all related accessories pattern controllers, timers, detection and verification systems, and all other optional process control devices Equipment Shutdown To safely complete many of the procedures described in this document, the equipment must first be shut down. The level of shut down required varies by the type of equipment in use and the procedure being completed. If required, shut down instructions are specified at the start of the procedure. The levels of shut down are: Relieving System Hydraulic Pressure Completely relieve system hydraulic pressure before breaking any hydraulic connection or seal. Refer to the melter-specific product manual for instructions on relieving system hydraulic pressure. De-energizing the System Isolate the system (melter, hoses, guns, and optional devices) from all power sources before accessing any unprotected high-voltage wiring or connection point. 1. Turn off the equipment and all auxiliary devices connected to the equipment (system). 2. To prevent the equipment from being accidentally energized, lock and tag the disconnect switch(es) or circuit breaker(s) that provide input electrical power to the equipment and optional devices. NOTE: Government regulations and industry standards dictate specific requirements for the isolation of hazardous energy sources. Refer to the appropriate regulation or standard. 2004 Nordson Corporation A1EN01[XXSAFE]10

1-8 Safety Disabling the Guns All electrical or mechanical devices that provide an activation signal to the guns, gun solenoid valve(s), or the melter pump must be disabled before work can be performed on or around a gun that is connected to a pressurized 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; then relieve the residual air pressure between the regulator and the gun. A1EN01[XXSAFE]10 2004 Nordson Corporation

Safety 1-9 General Safety Warnings and Cautions Table 1-1 contains the general safety warnings and cautions that apply to Nordson hot melt and cold adhesive equipment. Review the table and carefully read all of the warnings or cautions that apply to the type of equipment 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, and guns) Equipment Type HM Table 1-1 General Safety Warnings and Cautions Warning or Caution WARNING: Hazardous vapors! Before processing any polyurethane reactive (PUR) hot melt or solvent-based material through a compatible Nordson melter, read and comply with the material s MSDS. Ensure that the material s processing temperature and flashpoints will not be exceeded and that all requirements for safe handling, ventilation, first aid, and personal protective equipment are met. Failure to comply with MSDS requirements can cause personal injury, including death. HM WARNING: Reactive material! Never clean any aluminum component or flush Nordson equipment with halogenated hydrocarbon fluids. Nordson melters and guns contain aluminum components that may react violently with halogenated hydrocarbons. The use of halogenated hydrocarbon compounds in Nordson equipment can cause personal injury, including death. HM, CA WARNING: System pressurized! Relieve system hydraulic pressure before breaking any hydraulic connection or seal. Failure to relieve the system hydraulic pressure can result in the uncontrolled release of hot melt or cold adhesive, causing personal injury. HM WARNING: Molten material! Wear eye or face protection, clothing that protects exposed skin, and heat-protective gloves when servicing equipment that contains molten hot melt. Even when solidified, hot melt can still cause burns. Failure to wear appropriate personal protective equipment can result in personal injury. Continued... 2004 Nordson Corporation A1EN01[XXSAFE]10

1-10 Safety General Safety Warnings and Cautions (contd) Table 1-1 General Safety Warnings and Cautions (contd) Equipment Type HM, PC Warning or Caution WARNING: Equipment starts automatically! Remote triggering devices are used to control automatic hot melt guns. Before working on or near an operating gun, disable the gun s triggering device and remove the air supply to the gun s solenoid valve(s). Failure to disable the gun s triggering device and remove the supply of air to the solenoid valve(s) can result in personal injury. HM, CA, PC WARNING: Risk of electrocution! Even when switched off and electrically isolated at the disconnect switch or circuit breaker, the equipment may still be connected to energized auxiliary devices. De-energize and electrically isolate all auxiliary devices before servicing the equipment. Failure to properly isolate electrical power to auxiliary equipment before servicing the equipment can result in personal injury, including death. CA WARNING: Risk of fire or explosion! Nordson cold adhesive equipment is not rated for use in explosive environments and should not be used with solvent-based adhesives that can create an explosive atmosphere when processed. Refer to the MSDS for the adhesive to determine its processing characteristics and limitations. The use of incompatible solvent-based adhesives or the improper processing of solvent-based adhesives can result in personal injury, including death. HM, CA, PC WARNING: Allow only personnel with appropriate training and experience to operate or service the equipment. The use of untrained or inexperienced personnel to operate or service the equipment can result in injury, including death, to themselves and others and can damage to the equipment. Continued... A1EN01[XXSAFE]10 2004 Nordson Corporation

Safety 1-11 Equipment Type HM Warning or Caution CAUTION: Hot surfaces! Avoid contact with the hot metal surfaces of guns, hoses, and certain components of the melter. If contact can not be avoided, wear heat-protective gloves and clothing when working around heated equipment. Failure to avoid contact with hot metal surfaces can result in personal injury. HM CAUTION: Some Nordson melters are specifically designed to process polyurethane reactive (PUR) hot melt. Attempting to process PUR in equipment not specifically designed for this purpose can damage the equipment and cause premature reaction of the hot melt. If you are unsure of the equipment s ability to process PUR, contact your Nordson representative for assistance. HM, CA CAUTION: Before using any cleaning or flushing compound on or in the equipment, read and comply with the manufacturer s instructions and the MSDS supplied with the compound. Some cleaning compounds can react unpredictably with hot melt or cold adhesive, resulting in damage to the equipment. HM CAUTION: Nordson hot melt equipment is factory tested with Nordson Type R fluid that contains polyester adipate plasticizer. Certain hot melt materials can react with Type R fluid and form a solid gum that can clog the equipment. Before using the equipment, confirm that the hot melt is compatible with Type R fluid. 2004 Nordson Corporation A1EN01[XXSAFE]10

1-12 Safety 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 Aid If 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 melt has 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 hot melt to the medical personnel providing treatment. A1EN01[XXSAFE]10 2004 Nordson Corporation

Safety 1-13 Special Safety Instructions Safety Labels on the Gun The following safety labels are affixed to the adhesive gun: WARNING: Risk of electrical shock. Failure to observe may result in personal injury, death, or equipment damage. Safety Instructions in the Manual The following pictographs and the respective safety instructions are used in the manual: WARNING: Risk of electrical shock. Failure to observe may result in personal injury, death, or equipment damage. WARNING: Hot! Risk of burns. Wear heat-protective gloves. WARNING: Hot! Risk of burns. Wear safety goggles and heat-protective gloves. WARNING: System or material pressurized. Relieve pressure. Failure to observe may result in serious burns. CAUTION: Non-observance can result in damage to the equipment or accessories. 2007 Nordson Corporation

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Description 2-1 Section 2 Description Intended Use The series liquid adhesive guns subsequently also referred to as guns have been specially designed for the application of water-based adhesives. They can be used for non-contact glue application. Any other use is considered unintended use. The manufacturer is not liable for 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 maintained by persons who are familiar with the product and have been informed of the hazards involved. The respective rules for prevention of accidents as well as any other commonly recognized safety regulations and industrial health regulations must 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 of Protection With unauthorized modifications. The guns may not be used to process the following materials: Explosive and flammable materials Materials sensitive to pressure Food products. 2007 Nordson Corporation

2-2 Description Safety Instructions Residual Risks Prior to installation and first operation of the system, it is essential to read and follow the safety instructions. The general safety instructions are enclosed as an annex to the documentation folder or they are a section of this manual. The specific safety instructions are part of this manual. Nordson knows of no residual risks. General Information Updated Bill of Material The electrically controlled adhesive guns are designed for the application of water-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 nozzle needle is raised, thus opening the nozzle. When the power is switched off, a spring forces the needle down, closing the nozzle. The needle stroke can be adjusted by means of an adjustable pole face which can even be turned during operation. A mounting bracket is available which can secure the adhesive gun in practically all working positions. The mounting brackets described in this section relate to standard mounting brackets where reference is not made to any other units. Individual applications require individual solutions. In such cases, please contact Nordson. Refer to the updated Bill of Material enclosed with your equipment. For further questions, please contact Nordson. 2007 Nordson Corporation

Description 2-3 Functioning The following figure illustrates the basic method of operation of an adhesive gun within a complete system. Adhesive is to be applied to a substrate (7). The transport belts (8) convey the substrates. When the leading edge of a substrate reaches the photocell (10), the beam of light sent is reflected and the program is started. The control unit compiles all the data according to the speed of the production machine. The encoder (4) is mechanically connected to the transport equipment via a gear and supplies one pulse per mm. The control unit evaluates all the data and establishes the point at which the liquid adhesive guns (5) must be activated. The pump (12) is connected to the compressed air supply (1). It operates continuously 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 the proportional pressure control valve (2). The strength of the current is dependent on the speed of the production machine. The strength of the current determines how far the proportional pressure control valve (2) should be opened and the regulator (9) opens accordingly. The adhesive flows to the liquid adhesive guns (5) and is applied to the substrate. The length of the application is defined by the control unit program. 2007 Nordson Corporation

2-4 Description Functioning (contd.) 3 2 1 10 4 9 5 6 12 7 Electric Compressed air Adhesive 11 8 O615 Fig. 2-1 Principle Drawing 1 Compressed air feed 2 Proportional pressure control valve 3 Control unit 4 Encoder 5 Liquid adhesive gun 6 Adhesive pattern 7 Substrate 8 Transport belts 9 LA380 adhesive pressure regulator 10 Photocell 11 Adhesive reservoir 12 LA300 adhesive pump 2007 Nordson Corporation

Description 2-5 Method of Operation Components LA 820 When a peak voltage is applied to the magnetic coil in the adhesive gun, the needle in the module moves from its home position, thus opening the nozzle. A holding voltage retains the needle in this position. When the holding voltage is switched off, a correspondingly pretensioned spring moves the needle back and closes the opening. 1 2 3 4 5 6 9 8 7 O616 Fig. 2-2 LA 820 Adhesive Gun 1 Adhesive connection 2 Protective cap 3 Electrical connection 4 Adjustable pole face 5 Module 6 Sleeve nut with nozzle 7 Manifold 8 Mounting bracket 9 Fixing screw 2007 Nordson Corporation

2-6 Description LA 820 RC LogiComm 1 2 3 4 5 8 6 7 O617 Fig. 2-3 LA 820 RC LogiComm Adhesive Gun 1 Adhesive connection with glue filter 4 Adjustable pole face 2 Protective cap 5 Module 3 Electrical connection 6 Nozzle 7 Manifold 8 Fixing screw LA 820 RC LA4xx 1 2 3 4 5 8 6 7 O618 Fig. 2-4 LA 820 RC LA4xx Adhesive Gun 1 Adhesive connection with glue filter 4 Adjustable pole face 2 Protective cap 5 Module 3 Electrical connection 6 Nozzle 7 Manifold 8 Fixing screw 2007 Nordson Corporation

Installation 3-1 Section 3 Installation WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. WARNING: Disconnect power to the control unit before connecting coil leads. Failure to do so may result in death. Unpacking Transport Storage Disposal Unpack carefully. Then check for any damage caused during shipping. Reuse packaging materials or dispose of properly according to local regulations. The liquid adhesive gun is fully preassembled at the factory (refer to Components in Section Description). The LA 820 adhesive gun is supplied without a nozzle, whereas adhesive guns of the type LA 820 RC are supplied with a nozzle. The adhesive gun is a high precision, valuable part. Handle very carefully! Protect the nozzle from damage, e.g. with the original packaging. Do not store outside! Protect from humidity and dust. Do not lay the unit on the nozzle. Protect the nozzle from damage, e.g. by placing it in the original packaging. When your Nordson product has exhausted its purpose and/or is no longer needed, dispose of it properly according to local regulations. 2007 Nordson Corporation

3-2 Installation Installation Connecting Material Lines Electrical Lines Due to possible self-vibrations caused by intermittent operation, the liquid adhesive gun should be installed as firmly as possible. The transmission of vibrations from the production machine to the gun should be avoided as much as possible. The guns should be installed in an easily accessible location because they need to be removed for cleaning and maintenance purposes. NOTE: In general, a production machine refers to a machine in which Nordson equipment for adhesive application is integrated (e.g. a packing machine). The term production machine means the same as parent machine which may appear in other Nordson literature. The connections used most frequently are described in the following. In some cases, e.g. for enclosed operation or under clean room conditions, deviations from these instructions may be necessary. Remove the protective cap (2). Connect the material hose coming from the pressurized adhesive tank or pump to the adhesive connection (1) on the liquid adhesive gun. WARNING: Disconnect power to the control unit before connecting the electrical 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. 2007 Nordson Corporation

Installation 3-3 1 2 3 4 1 2 3 4 6 5 5 LA 820 LA 820 RC LogiComm O619 Fig. 3-1 Installing and Connecting the Adhesive Guns 1 Adhesive connection 2 Protective cap 3 Electrical connection 4 Adjustable pole face 5 Fixing screw 6 Mounting bracket 2007 Nordson Corporation

3-4 Installation Setting the Adhesive Quantity, LA 820 The adhesive pattern is influenced by the adhesive pressure and adhesive quantity. The adhesive pressure is determined by the pump control unit according to the application speed. Fig. 3-2 O620 The adhesive gun is equipped with an adjustable pole face to adjust the adhesive quantity (4, Fig. 3-1). Turn the adjustable pole face counterclockwise using an Allen key to increase the quantity of adhesive. Reduce the quantity of adhesive by turning the key clockwise. The upper side of the adhesive gun (Fig. 3-1) is provided with reference points which indicate the setting of the adjustable pole face. Turning the adjustable pole face one graduation point adjusts 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 bottom setting and then 3 graduations back. NOTE: Increasing the needle stroke reduces the maximum adhesive pressure. When operating at high speeds, the length of the adhesive bead is increased and, therefore, requires greater compensation. Setting the Adhesive Quantity, LA 820 RC The adhesive pattern is influenced by the adhesive pressure and adhesive quantity. The adhesive pressure is determined by the pump control unit according to the application speed. Fig. 3-3 O621 The LA 820 RC adhesive gun is equipped with an adjustable pole face to adjust the adhesive quantity (4, Fig. 3-1). Turn the adjustable pole face counterclockwise to increase the quantity of adhesive. Reduce the quantity of adhesive by turning the key clockwise. Turning the adjustable pole face one click adjusts the needle stroke by 0.02 mm (0.00078 ). The reference points are not applicable. NOTE: The default needle stroke setting is achieved by turning the adjustable pole face down fully and then turning it back 8 clicks. The adjustable pole face should be turned back a maximum of 10 clicks and a minimum of 4 clicks. NOTE: Increasing the needle stroke reduces the maximum adhesive pressure. When operating at high speeds, the length of the adhesive bead is increased and, therefore, requires greater compensation. 2007 Nordson Corporation

Installation 3-5 Mounting Brackets The mounting bracket illustrated in Fig. 3-4 is available for securing the adhesive gun. 1 5 2 3 4 Fig. 3-4 Mounting Bracket with Adhesive Gun 1 Folding carton bracket, 3 Liquid adhesive gun LA820 RC P/N 7301642, for gun LA820 RC 4 Adapter for GD100 glue sensor, and photocell LA650 P/N 7301636 2 Photocell LA650 5 Glue sensor GD100 2007 Nordson Corporation

3-6 Installation 2007 Nordson Corporation

Operation 4-1 Section 4 Operation WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. General Adhesive Processing Instructions NOTE: The following information is particularly important for the processing of 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 of dust, grease and moisture. The suitability of material, optimum working conditions and any necessary pre-treatment of the substrate must be determined by testing. Some substrates contain softeners and other components which may become volatile later. Occasionally, surfaces are covered with wax, isolating oil, etc. The bonding may fail immediately or later if pre-treatment/tests are not carried out. NOTE: Observe any comment sheets concerning the process to the material used. Compatibility of Different Types of Adhesives NOTE: Not all types of liquid adhesive are compatible. The adhesive may become degraded if improperly used, resulting in functional faults and, possibly, equipment damage. In our capacity as suppliers of adhesive guns, we assume no liability for damage to equipment, hoses and guns caused by the hardening of adhesive through improper handling. In case of doubt and/or intended change of adhesive, please contact the adhesive supplier, us or one of our representatives. 2007 Nordson Corporation

4-2 Operation Switching Off in an Emergency Familiarize yourself thoroughly in respect of behavior in emergency situations and with the location and activation of the Emergency Stop operating elements installed in the production area. WARNING: Press the Emergency Stop switch immediately in any emergency situation. Initial Startup 1. Trigger the nearest EMERGENCY STOP element (EMERGENCY STOP button, EMERGENCY STOP ripcord or main switch with EMERGENCY STOP function). 2. Locate and clear the cause of the Emergency Stop situation before switching the system on again. 1. Set the air pressure on the pump so that the max. hydraulic pressure is not exceeded. Liquid adhesive gun LA 820 LA 820 RC Max. hydraulic pressure 20 bar (290 PSI) 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 control unit. 3. Setup the control unit so that the adhesive flows out of the gun nozzle evenly and without any air bubbles. 4. Carry out test gluing and check the adhesive bead. If a thicker bead is required, the pressure can be increased but not in excess of the maximum hydraulic pressure. Daily Startup 1. Check whether there is sufficient adhesive in the reservoir. 2. Release the air pressure for the pump. Daily Shutdown 1. 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. 2007 Nordson Corporation

Maintenance 5-1 Section 5 Maintenance WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. 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 carrying out 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 require a corresponding minimum effort for maintenance. Do not use metallic, sharp-edged tools to clean the outside of the equipment, e.g. nozzle tips, only use soft brushes. When carrying out repair or maintenance work, keep the working space as well as the gun to be repaired as clean as possible. Adhesive guns which are soiled should be thoroughly flushed through when the opportunity occurs. This is possible particularly when the nozzle needle or material nozzles need to be replaced. The adhesive guns should not remain installed for any important maintenance work but be removed from the machine. Depressurize the material supply lines beforehand. 2007 Nordson Corporation

5-2 Maintenance Preventive Maintenance Cleaning the Liquid Adhesive Gun Regular Maintenance It is not necessary to clean the adhesive gun if air is prevented from entering into the hydraulic system and coming into contact with the glue. If this occurs, however, the glue starts to solidify after approx. 30 minutes. The precise time varies according to the adhesive used. Blocked nozzle orifices or guns can be cleaned easily at any time. NOTE: Do not disassemble an adhesive gun in which glue has solidified! It is highly likely this would damage sensitive components. We recommend immersing the adhesive gun in warm water for 1-2 days to soften the glue. Repeat the process several times, if necessary. If the adhesive gun still cannot be disassembled, return it to us for repair. We recommend flushing the liquid adhesive guns with water twice a year. The guns should always be kept clean, residual glue and dirt being removed daily. 2007 Nordson Corporation

Maintenance 5-3 Disassembling the LA 820 Liquid Adhesive Gun WARNING: Disconnect the power supply. WARNING: The system and material are pressurized. Shut off the compressed 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). Seal the adhesive hose with adhesive tape or plugs so that no adhesive can escape. 5. Loosen the two fixing screws (13) and remove the manifold (12) from the 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 adhesive gun. 10. Screw the adjustable pole face (3) from the adhesive gun and remove the 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. The adhesive gun would be damaged as a result. 2007 Nordson Corporation

5-4 Maintenance 1 2 3 4 5 15 6 7 14 8 9 13 10 12 11 O623 Fig. 5-1 Disassembling the LA 820 Liquid Adhesive Gun 1 Housing 6 Compression spring 2 Washer 7 Needle 3 Adjustable pole face 8 O-ring 4 O-ring 9 Seat 5 Compression spring 10 Sleeve nut 11 Sealing ring 12 Manifold 13 Fixing screw 14 Hose nipple 15 Hollow bolt 2007 Nordson Corporation

Maintenance 5-5 Disassembling the LA 820 RC Liquid Adhesive Gun The instructions for disassembling the adhesive gun apply to the LA 820 RC LA4xx and LA 820 RC Logicomm liquid adhesive guns. WARNING: Disconnect the power supply. WARNING: The system and material are pressurized. Shut off the compressed air supply! Otherwise, there is a considerable risk of injury. Refer to figure 5-2. 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). Seal the adhesive hose with adhesive tape or plugs so that no adhesive can escape. 5. Loosen the two fixing screws (10) and remove the manifold (9) from the adhesive 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 adhesive gun. 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. The adhesive gun would be damaged as a result. 2007 Nordson Corporation