LAC Series Oven Owner’s Manual Version 1 LAC-7 SERIES OVEN WITH PROTOCOL 3™ CONTROLLER OWNER’S MANUAL PREFACE 1 C-242 PN 320126 VERSION 1 6/2012 Copyright © 2012 by Despatch Industries. All rights reserved.
LAC Series Oven Owner’s Manual Version 1 PREFACE 2 Revision History Revision 1 Date 6/2012 Author Livingston Description Update to LAC-7 version from LAC-6 (Version 10). Update to Protocol 3. Copyright © 2012 by Despatch Industries. All rights reserved.
LAC Series Oven Owner’s Manual Version 1 Table of Contents 1. 2. 3. 4. 5. About This Manual ............................................................................................................. 6 1.1. Important User Information ..................................................................................... 6 1.2. Manufacturer & Service .......................................................................................... 7 1.3. Organization of this Manual ............................
LAC Series Oven Owner’s Manual Version 1 PREFACE 4 6. 7. 8. 5.3.1. Start Oven .......................................................................................................... 30 5.3.2. Working with Protocol 3 Operating Modes ...................................................... 30 Maintenance ..................................................................................................................... 31 6.1. Checklist ..................................................................
LAC Series Oven Owner’s Manual Version 1 Figure 20. LAC1-67-7, 240V (Drawing 313907A01)................................................................... 45 Figure 21. LAC2-12-7, 208V (Drawing 320164A01)................................................................... 45 Figure 22. LAC2-12-7, 240V (Drawing 313908A01)................................................................... 45 Figure 23. LAC2-18-7, 208V (Drawing 320166A01)..................................................................
LAC Series Oven Owner’s Manual Version 1 ABOUT THIS MANUAL 6 1. 1.1. About This Manual Important User Information Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied, or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of the publisher, unless it is for the purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 ABOUT THIS MANUAL 7 Danger! Only fully-trained and qualified personnel should setup and maintain this equipment. Improper setup and operation of this equipment could cause an explosion that may result in equipment damage, personal injury or possible death. The information in this document is not intended to cover all possible conditions and situations that might occur.
LAC Series Oven Owner’s Manual Version 1 ABOUT THIS MANUAL 8 Danger! Failure to heed warnings in this instruction manual and on the oven could result in personal injury, property damage or death. 1.4. Conventions This icon signifies information that describes an unsafe condition that may result in death, serious injury, or damage to the equipment.
LAC Series Oven Owner’s Manual Version 1 1.5. ABOUT THIS MANUAL 9 Specifications 1.5.1. Dimensions LAC Model No. Chamber Size in (cm) W * 0F D H Capacity 3 feet (liters) Overall Size in (cm) W D H Max. Number of Shelf Positions Exhaust Diameter Located on Back of Chamber in (cm) 1-10 13.75 (35) 12 (31) 12 (31) 1 (33) 23 (58) 19 (48) 29.5 (75) 5 1 (2.5) 1-38 A 18.75 (48) 18 (46) 19 (48) 3.7 (105) 28 (71) 25 (64) 35.5 (90) 9 2.5 (6.4) 1-38 B 18.
LAC Series Oven Owner’s Manual Version 1 ABOUT THIS MANUAL 10 Contact Despatch for options available to help prevent such failures. 1.5.2. Capacities LAC-7 Model Number 1-10-7 1-38 A-7 & 138 B-7 1-67-7 2-12-7 2-18-7 150 (68) 175 (79) 250 (113) 300 (136) 300 (136) 50 (23) 50 (23) 50 (23) 50 (23) 50 (23) CFM Adjustable to 5 Adjustable to 12 CFM 150 300 300 600 600 H.P.
LAC Series Oven Owner’s Manual Version 1 1.5.3. ABOUT THIS MANUAL 11 Power If the line voltage for your LAC-7 Series oven varies more than 10% from the oven voltage rating, electrical components such as relays and temperature controls may operate erratically.
LAC Series Oven Owner’s Manual Version 1 ABOUT THIS MANUAL 12 1.5.4. Temperature LAC-7 Model Number 40 °C – 100 °C 40 °C – 200 °C 40 °C – 260 °C Time to Temperature (approximate minutes with no load) Recovery Time - Door Open One Minute (approximate minutes with no load) Temperature Uniformity at 1.5.5. 100 °C 200 °C 260 °C 1-10 1-38 A 1-38 B 1-67 2-12 2-18 8 25 40 9 32 60 6 22 36 6 20 34 6 19 31 4 17 29 1 3 7 1 6 14 1 4 8 1 3 5 1 6 9 1 4 8 § ± 1 °C ± 2 °C ± 2.
LAC Series Oven Owner’s Manual Version 11 2. Safety 2.1. Safety Information Do not work on the LAC-7 Series oven without reading and understanding this section which contains important information and warnings. Ignoring these warnings can result in death, serious injury or damage to the machine and product. 2.1.1. Lockout Carefully follow the established Lock Out Tag Out policies of your company in all cases.
LAC Series Oven Owner’s Manual Version 1 SAFETY 14 4. Identify the Lockout Condition with a tag on the electrical disconnect and pneumatic shut off valve. 5. When work is complete, remove all tags and restore the machine to its working state. 2.1.2. Door and Panel Danger! Electrical panels contain high voltage. Disconnect and lock out the power supply before working inside any electrical panels. Failure to lock out the power supply can result in death or injury.
LAC Series Oven Owner’s Manual Version 11 2.3. SAFETY 15 LAC1-67, LAC2-12 & LAC2-18: Do not lift by hand. Lift with fork lifter and transport pallet. Maintenance Only qualified and trained personnel should perform maintenance or repair. 2.4. Electrical Power Only qualified and trained personnel should perform electrical maintenance or electrical repair. Danger! Contact with energized electrical sources may result in serious injury or death.
LAC Series Oven Owner’s Manual Version 1 SAFETY 16 2.5. Fire Keep the LAC-7 Series oven clean and free of scrap materials, oil or solvents to prevent the possibility of fire. In the event of fire, use a fire extinguisher as follows. 1. Leave door as it is. 2. De-energize the machine immediately by turning OFF the DISCONNECT SWITCH. 3. Turn off the remote main disconnect (customer supplied disconnect). 4. Shut off fuel. 5. Call the fire department. 6. Stay away.
LAC Series Oven Owner’s Manual Version 11 SAFETY 17 The disconnecting device must be installed in close proximity to the equipment and within easy reach of the operator. The disconnecting device must be marked as the disconnecting device for the equipment. If the unit is equipped with an ON/OFF switch, mark the ON/OFF position clearly. Follow local codes and requirements for installing and using disconnect switches.
LAC Series Oven Owner’s Manual Version 1 THEORY OF OPERATION 18 3. 3.1. Theory of Operation The LAC-7 Series Oven The LAC-7 high-performance bench-top oven uses digitally-controlled, horizontal recirculating airflow to ensure uniform temperatures throughout the oven for fast-processing (Figure 2). A high-volume fan circulates air through perforated, stainless steel walls to create a constant horizontal airflow across all sections of the oven (Figure 3).
LAC Series Oven Owner’s Manual Version 1 3.2. THEORY OF OPERATION 19 Damper Control The LAC-7 oven is equipped with a manually-adjustable damper mechanism. The damper control arm is located on the front panel of the oven (Figure 1). The damper adjustment controls the fresh air opening which, due to pressurization of the oven chamber, controls the flow of exhaust. If the damper is in the full open position, the maximum exhaust rate is achieved.
LAC Series Oven Owner’s Manual Version 1 THEORY OF OPERATION 20 3.2.1.3. Other Damper Settings The damper can be set to several other distinct operating positions. In most cases the damper setting is influenced by two specific performance factors: uniformity and cool-down rates. Chamber Uniformity The system’s inside chamber pressure influences chamber uniformity. Pressure inside the chamber depends on the amount of fresh air flowing into the chamber.
LAC Series Oven Owner’s Manual Version 1 THEORY OF OPERATION 21 Timer: Oven operates at a fixed temperature for a user-selected time period, and then automatically turns off. Profile: Temperatures increase or decrease as defined by 255 segments that can be allocated to 64 ramp and soak profiles. The profiles can be linked to provide additional temperature combinations. Review the Protocol 3 Controller Owner’s Manual for more information. Figure 5. Protocol 3 Controller Operator Interface.
LAC Series Oven Owner’s Manual Version 1 ASSEMBLY & SETUP 22 4. Assembly & Setup Assembly and Setup provides directions for unpacking and installing your LAC-7 Series oven. 4.1. Unpack & Inspect the LAC-7 Series Oven Remove all packing materials and thoroughly inspect the oven for any damage that might have occurred during shipment. Note condition of carton and plastic cover sheet inside carton. Observe all outside surfaces and corners of the oven for scratches and dents.
LAC Series Oven Owner’s Manual Version 1 4.1.1. ASSEMBLY & SETUP 23 If Damaged During Shipping If damage occurred during shipping: 1. Contact the shipper immediately and file a written damage claim. 2. Contact Despatch Industries (1-800-473-7373 or 1-952-469-8230 or service@despatch.com) to report your findings and to order replacement parts for those damaged or missing. Send a copy of your filed damage claims to Despatch industries (Despatch Industries, 8860 207th Street, Lakeville, MN 555044, USA). 3.
LAC Series Oven Owner’s Manual Version 1 ASSEMBLY & SETUP 24 Caution! Do not tilt oven while lifting or lift oven using the door handle to prevent damage to the oven and/or personnel involved. Caution! Do not risk injury when lifting equipment. Take proper precautions when lifting, carrying or otherwise maintaining heavy items. How to lift the different sizes of ovens: Notice LAC1-10: Two people lift oven’s lower corners and place on wheeled transport pallet.
LAC Series Oven Owner’s Manual Version 1 ASSEMBLY & SETUP 25 Danger! All grounding and safety equipment must be in compliance with applicable codes, ordinances and accepted safe practices. Models LAC 1-10, 1-38A, 1-38B, and 1-67 come equipped with an appropriate plug and cord. Models LAC 2-12 and 2-18 must be hardwired to the electric supply using 10 AWG or larger wires suitable for at least 75 °C (167 °F). Figure 6. LAC2-18-7 Nameplate. 4.2.3.1.
LAC Series Oven Owner’s Manual Version 1 ASSEMBLY & SETUP 26 1. Open the knock-out near the rear-access panel (Figure 7). Power cord fitting or conduit Access plate to assist in tightening conduit fitting Figure 7. Rear Access Panel for Hard-Wired Connections. 2. Turn hinged front panel latches ¼ turn for easy access to access power connection (Figure 8). Figure 8. Hinged Panel for Simpler Access to Power Connections. 3.
LAC Series Oven Owner’s Manual Version 1 ASSEMBLY & SETUP 27 Connect power at main circuit board terminals L1 and L2. Figure 9. Power Connections at Main Circuit Board. Copyright © 2012 by Despatch Industries. All rights reserved.
OPERATION 28 5. LAC Series Oven Owner’s Manual Version 1 Operation Users and operators of this oven must comply with operating procedures and training of operating personnel as required by the Occupational Safety and Health Act (OSHA) of 1970, Section 5 and relevant safety standards, and other safety rules and regulations of state and local governments. Refer to the relevant safety standards in OSHA and National Fire Protection Association (NFPA), Section 86 of 1990.
LAC Series Oven Owner’s Manual Version 1 OPERATION 29 Avoid spilling on the heater elements or oven floor when loading the oven. Do not place the load on the oven floor plate. Placing the load on the oven floor may cause the load to heat unevenly and the weight may cause shorting out of the heater elements. Use the shelves provided. Caution! Always place loads on the shelves provided to avoid possible uneven heating and damage to the oven.
OPERATION 30 5.3.1. LAC Series Oven Owner’s Manual Version 1 Start Oven 1. Start fan a. Open oven door b. Press Power Switch to ON (Figure 1). Listen for the recirculating fan to start. c. Shut oven door d. Check that control display turns ON. 2. Operate temperature control as desired by following the control operation instructions to follow. 5.3.2. Working with Protocol 3 Operating Modes Refer to the Protocol 3 Controller Owner’s Manual for specifics on working with the controller.
LAC Series Oven Owner’s Manual Version 1 6. MAINTENANCE 31 Maintenance Only qualified and trained personnel should perform maintenance or repair. Maintenance tasks should be performed with appropriate proper personal protective equipment (PPE). Appropriate PPE includes safety glasses, rubber gloves for handling chemicals, high-temperature gloves for handling hot parts, and a dust mask for working with insulation.
MAINTENANCE 32 6.2. LAC Series Oven Owner’s Manual Version 1 dirt may produce unsatisfactory work results. Keep all equipment accessible. Do not permit other materials to be stored or piled against it. Protect controls against excessive heat—particularly controls, motors or other equipment containing electronic components. Temperatures greater than 51.5°C (125°F) should be avoided. Establish maintenance and checkup schedules. Do this promptly and follow the schedules faithfully.
LAC Series Oven Owner’s Manual Version 1 6.3.2. MAINTENANCE 33 Decontaminating the LAC-7 Series Oven Warning! Do not decontaminate oven without first disconnecting power. Ensure adequate personal safety while decontaminating oven. Notice Before using any cleaning or decontamination method except those recommended by the manufacturer, users should check with the manufacturer that the proposed method will not damage the equipment. For best results, decontaminate the work zone daily. 1.
MAINTENANCE 34 LAC Series Oven Owner’s Manual Version 1 2. Press Menu and lower the High Limit setpoint to a value just below the current process temperature. 3. Press Run. 4. The High Limit alarm indicator will flash and a High Limit alarm message will display. 5. Press Stop. 6. Press Reset. 7. Return the control setpoint and High Limit setpoint values to their original values. 6.5.
LAC Series Oven Owner’s Manual Version 1 6.6.2. MAINTENANCE 35 Replace Heater Unit Tools needed: 3/8" wrench, T20 Torx bit driver 1. Remove the floor plate. a. Remove the screws from the floor plate Figure 10. Remove Screws to Remove Floor Plate. (Figure 10). b. Lift the floor plate out of the oven to expose heater panel/inlet cone (Figure 11). Figure 11. Heater Panel and Inlet Cone. 2. Remove side walls by removing the screws on the front edge of each panel (Figure 12). 3.
MAINTENANCE 36 LAC Series Oven Owner’s Manual Version 1 4. 5. 6. 7. 8. Unscrew the screws holding the heater frame to the oven body (Figure 13). Remove heater and discard. Screw down the new heater frame. Attach the heater leads to appropriate terminals. Replace and screw in interior floor and side panels. Figure 13. Remove Heater Panel by Removing Screw in Front Edge of Each Panel. 6.6.3. Replace Fan Motor Tools needed: T20 Torx bit driver, 5/32 inch Allen wrench, one quarter (¼) inch socket set 1.
LAC Series Oven Owner’s Manual Version 1 MAINTENANCE 37 17. Install the fan motor. a. Insert shaft seal onto shaft. b. Insert the shaft into shaft collar. c. Fasten motor to plug assembly with the four screws. 18. Install fan wheel onto motor shaft. 19. Replace and fasten the fan inlet cover. 20. Adjust the fan wheel for 3/16 inch clearance between the wheel and the inlet ring and tighten the set screws on the fan wheel. Check that the set screws hit the flats machined into the motor shaft. 21.
MAINTENANCE 38 7. 7.1. LAC Series Oven Owner’s Manual Version 1 Troubleshooting Troubleshooting Symptoms Table 2 lists symptoms, probably causes and suggested remedies. Table 3 shows how to troubleshoot the control panel mounted circuit board. Table 2. Troubleshooting Oven Symptoms.
LAC Series Oven Owner’s Manual Version 1 Symptom Oven will not control at setpoint Heater does not shut down until temp. reaches the High Limit setting Possible Cause High Limit set too low Protocol 3 controller malfunction SSR malfunction Air friction of recirculation fan TROUBLESHOOTING 39 Next Step Set the High Limit higher. Replace controller. Replace SSR and/or check control output voltage. Open exhaust air vent. Unit will not control below minimum operating temperature with vent closed.
TROUBLESHOOTING 40 LAC Series Oven Owner’s Manual Version 1 Danger! Electrical panels contain high voltage. Turning the power switch off on the oven does not de-energize the circuit board. Disconnect and lock out the power supply before working on the circuit board. Failure to lock out the power supply can result in death or injury. 7.2. Troubleshooting Error Messages and Alarms Table 4 lists the more common error messages, possible problems and remedies. Table 4. Error Messages and Next Steps.
LAC Series Oven Owner’s Manual Version 1 8. 8.1. APPENDICES 41 Appendices Standard Products Warranty Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 42 8.2. LAC Series Oven Owner’s Manual Version 1 LAC-7 Series Oven Options 8.2.1. Optional MRC5000 Recorder Setup Refer to instructions provided by the recorder manufacturer for more specific installation notes. Temperature is retransmitted to the MRC5000 recorder from the controller. To set up the recorder: 1. Ensure hardware jumper JU1 is in place for the 5 VDC setting (Refer to MRC5000 Manual included). 2. Move MODE to PROG/TEST/CAL to display Prog. 3. Press ▼ twice to display Inps.
LAC Series Oven Owner’s Manual Version 1 8.2.2. APPENDICES 43 Optional Pneumatic and Electronic Door Lock The LAC-7 Series oven pneumatic and electronic door lock option prevents the door from being opened if a Protocol 3 controller event is active. 8.2.3. Optional Interior Light The LAC-7 Series oven optional interior light allows users to see inside the oven during operation. The interior lights uses a 50W bulb mounted inside the oven.
APPENDICES 44 8.2.6. LAC Series Oven Owner’s Manual Version 1 Optional Forced Exhaust The LAC-7 Series oven optional forced exhaust allows increased cooling by using an extra fan. The forced exhaust is triggered by an event or by pressing Exhaust Fan on the control panel—or both. Find more information about exhaust and the LAC-7 Series ovens in Sections 3.1, 3.2 and 5.2. 8.2.7.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 45 Figure 15. LAC1-10-7, 120V (Drawing 313904A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 46 LAC Series Oven Owner’s Manual Version 1 Figure 16. LAC1-38A-7, 120V (Drawing 313906A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 47 Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 48 LAC Series Oven Owner’s Manual Version 1 Figure 17. LAC1-38B-7, 208V (Drawing 320160A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 49 Figure 18. LAC1-38B-7, 240V (Drawing 320125A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 50 Figure 19. LAC1-67-7, 208V (Drawing 320162A01). LAC Series Oven Owner’s Manual Version 1 Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 51 Figure 20. LAC1-67-7, 240V (Drawing 313907A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 52 Figure 21. LAC2-12-7, 208V (Drawing 320164A01). LAC Series Oven Owner’s Manual Version 1 Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 53 Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 54 LAC Series Oven Owner’s Manual Version 1 Figure 22. LAC2-12-7, 240V (Drawing 313908A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 55 Figure 23. LAC2-18-7, 208V (Drawing 320166A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
APPENDICES 56 LAC Series Oven Owner’s Manual Version 1 Figure 24. LAC2-18-7, 240V (Drawing 313905A01). Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 1 APPENDICES 57 Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
LAC Series Oven Owner’s Manual Version 11 58 3rdDraft— Copyright © 2012 by Despatch Industries. All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
